tender for supply of nabl accreditation of fcl, midnapore for laboratory chemicals / glassgoods and articles , description of products / chemicals/ glassgoods/laboratory articles , chemicals:- potassium dihydrogen phosphate : [104873 supelco] specifications : traceable to the international organization for standardization (iso) standard 6353; assay- =99.5% dry basis (alkalimetric), 99.5-100.5% (alkalimetric); solubility-208 g/l; quality level-300; anion traces-chloride (cl-): =0.0005%, sulfate (so42-): =0.003%; ph-4.2-4.6 (20 °c, 20 g/l in h2o) (emsure®) (merck/sigma aldrich) , phosphate standard solution certified reference material, 1000 mg/l (po4),[1.04690 supelco] specifications : traceable to srm from nist kh2po4 in h2o, certipur; quality level-300; density-0.998 g/cm3 at 20 °c (emsure®)(merck/sigma aldrich) , potassium standard solution [170230 supelco] specifications : traceable to srm from nist kno3 in hno3 0.5 mol/l 1000 mg/l k certipur®; quality level-300; density-1.013 g/cm3 at 20 °c; ph value- 0.5 (h2o, 20 °c) (emsure®) (merck/sigma aldrich) , ammonium chloride [101145 supelco] for analysis emsure® acs,iso,reag. ph eur. specifications : quality level-300; density- 1.53 g/cm3 (25 °c); ph- 5 - 5.5 (h2o, 25 °c) (external msds); bd-600 - 900 kg/m3; solubility- 372 g/l (external msds) (emsure®) (merck/sigma aldrich) , urea [nist2141] nist® srm® 2141 specifications : grade-certified reference material; mp-132-135 °c (lit.); form-crystals (merck/sigma aldrich) , nist999c potassium chloride primary standard (nist) , acetone for analysis [1.00014 supelco ] specifications : grade-acs, iso, reag. ph eur; assay- =99.8% (gc); density-0.790-0.793 g/cm3 at 20 °c; grade-acs reagent (emsure®) (merck/sigma aldrich) , nitric acid 65% [100456 supelco] specifications : grade- eur,iso ; quality level-300; density- 1.39 g/cm3 (20 °c); ph value- <1 (h2o, 20 °c) strongly acid (emsure®) (merck/sigma aldrich) , citric acid monohydrate (100244 supelco ) specifications : grade- for analysis acs,iso,reag. ph eur; quality level-300; density- 1.54 g/cm3 (20 °c); ph value- 1.8 (50 g/l, h2o, 20 °c) ; strongly acid; solubility- 880 g/l; (emsure®) (merck/sigma aldrich) , sodium molybdate dehydrate (106521 supelco) specifications : grade: acs,reag. ph eur; quality level-300; density- 2.71 g/cm3 (22 °c) (for the dihydrate); mp- 687 °c elimination of water of crystallization; ph- 9 - 10 (840 g/l, h2o, 20 °c); bd- 1000 - 1400 kg/m3 (emsure®) (merck/sigma aldrich) , synthetic quinoline analytical standard (94517 supelco) specifications : titration (nt) hclo4 0.1m- 97.5 - 102.5 %; purity (gc area %)- = 98.0 %; (sigma) (merck/sigma aldrich) , sodium hydroxide pellets for analysis (1.06498 supelco) specifications : traceable to nist standards; assay- =99% naoh basis (acidimetric); impurities - =0.0003% total nitrogen (n); ph- >14 (20 °c, 100 g/l in h2o); mp- 318 °c (lit.); quality level-300; assay- =99% naoh basis (acidimetric). (emsure®) (merck/sigma aldrich) , hydrochloric acid solution (titripur) (1.09060 supelco) c(hcl) = 0.1 mol/l (0.1 n), specifications : grade -:reag. ph. eur., reag. usp, volumetric solution for titration; quality level -200; quality ; quality -analyzed in ouriso 17025 accredited qc lab; (titripur®) (merck/sigma aldrich) , sodium hydroxide solution (1.09141 supelco) (titripur) c(naoh) = 0.1 mol/l (0.1 n), specifications : grade -:reag. ph. eur., reag. usp, volumetric solution for titration; quality level -200; quality ; quality -analyzed in ouriso 17025 accredited qc lab; (titripur®) (merck/sigma aldrich) , sulphuric acid solution (1.09074 titripur) c(h2so4) = 0.1 mol/l (0.1 n), specifications : grade -:reag. ph. eur., reag. usp, volumetric solution for titration; quality level -200; quality ; quality -analyzed in ouriso 17025 accredited qc lab; (titripur®) (merck/sigma aldrich) , hydrochloric acid (30721 sigma-aldrich) specifications : =37%, puriss. p.a., acs reagent, reag. iso, reag. ph. eur., fuming, apha: =10 (sigma) (merck/sigma aldrich) , silica gel beads, desiccant ~ 2 - 5 mm; [1.07735.1000] specifications - quality level -200; (merck) (merck/sigma aldrich) , sulfuric acid 95-97% (100732 supelco) specifications :grade-acs,iso,reag. ph eur; density-1.84 g/cm3 (20 °c); ph-0.3 (49 g/l, h2o, 25 °c); vp-0.0001 hpa (20 °c); mp--20. 0°c); quality level-300 (emsure®) (merck/sigma aldrich) , potassium sulfate (105153 supelco) specifications- for analysis emsure® acs,iso,reag. ph eur; quality level-300; density- 2.662 g/cm3 (20 °c); ph- 7 (h2o, 25 °c); mp- 1067 °c; solubility- 111 g/l (emsure®) (merck/sigma aldrich) , copper(ii) sulfate (451657 sigma-aldrich) specifications- anhydrous, powder, =99.99% trace metals basis - £100.0 ppm; (sigma) (merck/sigma aldrich) , zinc powder for analysis particle size < 45 μm (108789 supelco) quality level-300; density- 7.140 g/cm3 (20 °c); ph- 7 (h2o, 25 °c); vp- 1.33 hpa (487 °c); mp- 411 °c; solubility- 111 g/l; bd- 1800 - 2700 kg/m3 (emsure®) (merck/sigma aldrich) , sodium tetraphenyl borate (106669 supelco) specifications grade - gr for analysis acs,reag. ph eur; mp- >300 °c; ph- 8 (50 g/l, h2o, 20 °c); bd- 500 kg/m3 (gr) (merck/sigma aldrich) , benzalkonium chloride solution =50% (via cl), 50% in h2o (63249 sigma-aldrich) specifications: quality level- (sigma) (merck/sigma aldrich) , formaldehyde solution 37 wt. % in h2o, solution (252549 sigma-aldrich) specifications-grade-acs reagent grade,contains 10-15% methanol as stabilizer (to prevent polymerization); color test-£10 apha; titration by h2so4-36.5 - 38.0 %; titratable acid (meq/g)- £ 0.006; residue on ignition (ash)- £ 0.006; (sigma) (emsure®) (merck/sigma aldrich) , titan yellow (c.i. 19540) (1.01307 supelco) specifications-grade-metal indicator, reag. ph eur; quality level-200; loss- =8% loss on drying, 110°c; mp- >300 °c (decomposition); ph- 5.1 (20 °c, 10 g/l in h2o), 20 °c); bd- 310 kg/m3; ?max- 398-402 nm (buffer ph 7.0); solubility- 29 g/l (merck) (emsure®) (merck/sigma aldrich) , methyl red (250198 sigma-aldrich) specifications-grade- acs reagent; melting point 179 - 182 °c;infrared spectrum conforms to structure; solubility (turbidity)-pass 0.1%, ethanol clear solution with only a faint trace of turbidity or insoluble matter visual interval 0pass; ph 4.2 = pink; visual interval-pass; ph 5.5 = orange visual interval- pass ph 6.2 = yellow (sigma) (merck/sigma aldrich) , methylcarbinol/ethanol absolute for analysis (1.00983 supelco) specifications-grade- acs,iso,reag. ph eur; assay: =99.9% (gc); bp:-78 °c (lit.);vapor pressure:-59 hpa( 20 °c) (emsure®) (merck/sigma aldrich) , boric acid for analysis (1.00165 supelco) specifications-grade- acs,iso,reag. ph eur; assay- 99.5-100.5% (alkalimetric); quality level-300; vapor pressure:- 2.6 mmhg ( 20 °c); ph- 3.8-4.8 (20 °c, 33 g/l in h2o) (emsure®) (merck/sigma aldrich) , di-ammonium hydrogen phosphate (1.01207 supelco) specifications-grade- acs, iso,reag. ph eur; assay- =99.0% (acidimetric); quality level-300; impurities- =0.005% insoluble matter; ph- 7.6-8.2 (20 °c, 100 g/l in h2o); solubility-690 g/l (emsure®) (merck/sigma aldrich) , potassium hydrogen phthalate volumetric standard, secondary reference material for alkalimetry, (102400 supelco) specifications-grade- traceable to nist standard reference material (srm) certipur® reag. ph eu. quality level-300; mp- 301.7 °c; ph- 4.0 (50 g/l, h2o, 20 °c); bd- 900 kg/m3; solubility-80 g/l (merck) (merck/sigma aldrich) , ammonia solution 25%, for analysis (1.05423 supelco) specifications-grade- iso,reag. ph eur; quality level-300; mp- -57.5 °c; ph- 4.0 (50 g/l, h2o, 20 °c); bp- 37.7 °c/1013 hpa;density- 0.9 g/ml at 25 °c (lit.); vp- 483 hpa ( 20 °c); expl. lim.- 27 % (emsure®) (merck/sigma aldrich) , magnesium oxide for analysis (105865 supelco) specifications - assay:=97% (complexometric); quality level -300; impurities-=0.1% substances insoluble in hydrochloric acid, =0.5% substances soluble in water; ph- 10.3 (20 °c in h2o, saturated solution); bp-3600 °c/1000 hpa; mp-2800 °c; density-3.58 g/cm3 at 25 °c (emsure®) (merck/sigma aldrich) , citric acid/sodium hydroxide/hydrogen chloride ) ph 4.00 (25°c) [[1990640001] specifications- grade- traceable to srm from nist and ptb; quality level-300; ph- 4.0 (25 °c in h2o); density- 1.01 g/cm3 at 20 °c (certipur®) (merck/ sigma aldrich) , potassium dihydrogen phosphate/di-sodium hydrogen phosphate buffer solution ph(s) = 7.0 (25°c) [1.99002 supelco], specifications- grade-directly traceable to primary srm from nist/ptb; quality level-300; ph- 7.0 (25 °c in h2o); bp- 109 °c/1013 hpa; mp- -5 °c; density- 1.01 g/cm3 at 20 °c (certipur®) (merck/sigma aldrich) , di-sodium tetraborate decahydrate ph 9.18 (25°c) [107203 supelco], specifications- grade- primary srm from nist/ptb; quality level-300; ph- 9.2 (h2o, 25 °c); bp- 100 °c (1013 hpa); density- 1.00 g/cm3 (20 °c) (certipur®) (merck/sigma aldrich) , salicylic acid for synthesis (818731 sigma-aldrich) specifications- quality level-200; mp- 158 - 160 °c; ph- 2.4 (h2o, 20 °c) (saturated solution); bp- 211 °c (1013 hpa);density- 1.44 g/cm3 (20 °c); vp- 1 hpa (114 °c); solubility- 2 g/l, bd- 400 - 500 kg/m3 (sigma) (merck/sigma aldrich) , sodium thiosulfate anhydrous (106512 supelco) specifications- quality level-200; mp- 48 °c; ph- 6.0 - 9.5 (50 g/l, h2o, 20 °c); bp- 211 °c (1013 hpa);density- 1.667 g/cm3 (20 °c); solubility- 701 g/l, bd- 1350 kg/m3 (emplura®) (merck/sigma aldrich) , chromium =99% trace metals basis, powder, <45 μm (266299 sigma-aldrich) specifications- quality level-100; resistivity-12.7 μ?-cm, 20°c; bp-2672 °c (lit.); mp-1857 °c (lit.); density-7.14 g/ml at 25 °c (lit.) (sigma) (merck/sigma aldrich) , iron(ii) sulfate heptahydrate for analysis (103965 supelco) specifications- grade- acs,iso,reag. ph eur ; quality level-100; molar mass-278.01 g/mol;ph-3.0 - 4.0 (50 g/l, h2o, 25 °c), vp-14.6 hpa (25 °c); bp-2672 °c (lit.); mp-64 °c elimination of water of crystallisatio; density-1.898 g/cm3 (25 °c); bd-600 kg/m3, solubility -400 g/l (emplura®) (merck/sigma aldrich) , barium chloride dehydrate (101719 supelco) specifications- grade- acs,iso,reag. ph eur; molar mass- 244.28 g/mol; density-3.100 g/cm3 (18 - 25 °c); melting point- 113 °c (anhydrous substance); ph value-5.0 - 8.0 (50 g/l, h2o, 25 °c); bulk density- 1200 - 1400 kg/m3 (emsure®) (merck/sigma aldrich) , sodium carbonate anhydrous (102405 supelco) specifications- grade- volumetric standard, secondary reference material for acidimetry, traceable to nist srm; molar mass- 105.99 g/mol; boiling point-1600 °c (decomposition); density-2.52 - 2.53 g/cm3 (20 °c);melting point-851 °c; ph value-11.16 (4 g/l, h2o, 25 °c);bulk density-1100 kg/m3;solubility-212.5 g/l (certipur®) (merck/sigma aldrich) , silver nitrate for analysis (101512 supelco)specifications- grade- acs,iso,reag. ph eur; molar mass- 169.87 g/mol; quality level-300; boiling point- 444 °c (1013 hpa) (decomposition); density-4.350 g/cm3;melting point-212 °c; ph value-5.4 - 6.4 (100 g/l, h2o, 20 °c);bulk density-2350 kg/m3; solubility-2160 g/l (emsure®) (merck/sigma aldrich) , potassium sodium tartrate tetrahydrate for analysis (108087 supelco) specifications- grade-acs,iso,reag. ph eur; quality level-300; molar mass- 282.23 g/mol; quality level-300; melting point -70 - 80 °c; ph value-7.0 - 8.5 (h2o); bulk density-1000 kg/m3; solubility-630 g/l. (emsure®) (merck/sigma aldrich) , biuret 98% (contains =10%(w/w) triuret) (15270 sigma-aldrich) specifications- molecular weight-103.08; quality level -100; assay-98% (contains =10%(w/w) triuret); impurities-=1% water; mp-185-190 °c (dec.) (lit.) (sigma)(merck/sigma aldrich) , calcium carbonate volumetric standard, secondary reference material for complexometry (102410 supelco) specifications-grade- nist standard reference material (srm) usp; molecular weight-100.09 g/mol; quality level -300; density-2.8 g/cm3; melting point-825 °c (decomposition); ph value-8.0 (h2o) (slurry); bulk density-300 - 1400 kg/m3; solubility-0.017 g/l (certipur®) (merck/sigma aldrich) , ethylenedinitrilotetraacetic acid disodium salt dihydrate (1.08454 supelco) specifications-grade- essential, ph. eur., bp, chp, jp, usp; molecular weight-327.24 g/mol; quality level -100; ph- 4-5 (20 °c, 50 g/l in h2o); mp-248 °c (dec.) (lit.); solubility-100 g/l; bulk density-700 kg/m3 (merck)(merck/sigma aldrich) , magnesium sulfate heptahydrate for analysis (1.93245 supelco) specifications-grade- acs; molecular weight-246.47 g/mol; quality level-200; vapor density-<0.01 (vs air); vapor pressure-<0.1 mmhg ( 20 °c) ( emparta®) (merck/sigma aldrich) , eriochrome black t (c.i. 14645) (103170 supelco) specifications-grade- acs,reag. ph eu; molecular weight- 461.38 g/mol ; quality level -200; absorption maximum ?max. (buffer ph 10.0) -612 - 616 nm; spec. absorptivity a 1%/1cm (?max; 0.02 g/l; buffer ph 10.0; calc. on dried substance)-400 – 510; loss on drying (110 °c)-= 7 % (merck) (merck/sigma aldrich) , ammonium iron(ii) sulfate hexahydrate (215406 sigma-aldrich) specifications-grade- acs, molecular weight- 392.14g/mol ; quality level -200; assay-98.5-101.5%; 99%;impurities-=0.01% insolubles; =0.05% not nh4oh pptd.; ph-3-5 (20 °c, 50 g/l); mp-100 °c (dec.) (lit.) (sigma) (merck/sigma aldrich) , ammonium thiocyanate (101213 supelco) specifications-grade-acs, iso,reag. ph eur; molecular weight- 76.12g/mol ; quality level -300; density -1.31 g/cm3 (20 °c); melting point-152 - 154 °c; ph value-4.0 - 5.5 (76.1 g/l, h2o, 25 °c); vapor pressure-<0.1 hpa (20 °c); bulk density-600 - 700 kg/m3; solubility-1600 g/l (emsure®) (merck/sigma aldrich) , benzene for analysis (1.01783.2500) specification-grade acs, iso, reag. ph eur; purity-=99.7%, mp-=5.2ºc, bp-79-81ºc; density-0.877-0.879 g/cm3 (d 20º c/4º c) (emsure®) (merck/sigma aldrich) , ammonium nitrate for analysis (101188 supelco) specification-grade-acs, mol. mass-80.04g/mol; quality level -300; boiling point-210 °c (15.0 hpa); density-1.725 g/cm3 (25 °c); melting point-169 °c; ph value-4.5 - 7.0 (100 g/l, h2o, 20 °c);bulk density-600 - 700 kg/m3;solubility-1920 g/l (emsure®) (merck/sigma aldrich) , bromothymol blue (103026 supelco) specifications- grade- acs,reag. ph eur ; molecular weight- 624.40 g/mol; quality level -200; melting point-201 °c; bd-450kg/m3; transition range-ph 5.8 - ph 7.6 yellow – blue; absorption maximum ? 1 max. (buffer ph 5.8) -430 - 435 nm; absorption maximum ? 2 max. (buffer ph 7.6)-615 - 618 nm; spec. absorptivity a 1%/1cm (? 1 max.; 0.005 g/l; buffer ph 5.8; calc. on dried substances)-260 - 305 (merck) (merck/sigma aldrich) , phenolphthalein (107233 supelco) specifications-grade- acs,reag. ph eur; molecular weight- 318.33 g/mol; quality level -200; density -1.27 g/cm3 (32 °c); melting point-263.7 °c; vapor pressure-<0.1 hpa (50 °c); bulk density-350 - 450 kg/m3; solubility-3.36 mg/l (merck) (merck/sigma aldrich) , sulfur (414980 sigma-aldrich) specifications- 99.98% trace metals basis; molecular weight- 32.07 g/mol; assay-99.98% trace metals basis; trace metal analysis < 250.0 ppm (sigma) (merck/sigma aldrich) , ammonium iron(iii) citrate (103762 safc) specifications-quality level-200; density-1.064 g/cm3 (978 hpa, 26 °c): ph value -6 - 8 (100 g/l, h2o, 20 °c); solubility-1200 g/l (emparta®) (merck/sigma aldrich) , calcon metal indicator specifications-absorption maximum ?max (ethanol) : 569-572nm, spec. absorptivity a 1%/1cm (?max: 0.025g/l ; ethanol; calc, on water free substance) = 250, water (according to karl fischer )= 9 (emparta®) (merck/sigma aldrich) , carbon disulfide (102214 supelco) specifications-grade- reag. ph eur, molecular weight- 76.14 g/mol; quality level -300; boiling point-46.5 °c (1013 hpa); density-1.26 g/cm3 (20 °c); explosion limit-1 - 60 %(v);flash point--30 °c; ignition temperature-95 °c; melting point--111.5 °c; vapor pressure-274 hpa (25 °c);solubility- 2.1 g/l (emparta®) (merck/sigma aldrich) , barium hydroxide octahydrate for analysis specifications- grade- acs,iso,reag. ph eur: quality level-100; molar mass-315.48 g/mole; ph-12.5 (50 g/l, h2o, 20 °c) (saturated aqueous solution), mp-78°c; density-2.180 g/cm3; bd-900 - 1100 kg/m3, solubility -72 g/l. (emparta®) (merck/sigma aldrich) , d(-)-mannitol (105983 supelco) specifications- quality level-100; molar mass-182.17 g/mol; boiling point-290 - 295 °c (4 hpa); density-1.52 g/cm3 (20 °c); ignition temperature-410 °c; melting point-165 °c; ph value- 5.0 - 6.5 (182 g/l, h2o, 25 °c); bulk density-400 - 500 kg/m3;solubility-213 g/l (merck) (merck/sigma aldrich) , bismuth (iii) nitrate (101878 supelco) alkaline for analysis specifications- grade- reag. ph eur; quality level-300; molar mass- 1461.99 g/mole; density-4.93 g/cm3; melting point-500 °c not applicable,(decomposition); ph value-3.2 (50 g/l, h2o, 20 °c) (slurry); bulk density-600 kg/m3 (emsure®) (merck/sigma aldrich) , sodium diethyldithiocarbamate trihydrate (106689 supelco) specifications- grade-acs; quality level-100; molar mass- 225.31g/mole; melting point-93 °c; ph value-7 (20 g/l, h2o, 20 °c); solubility-600 g/l (merck) (merck/sigma aldrich) , carbon tetrachloride reagent grade, 99.9% (319961 sigma-aldrich) specifications- assay-99.9%; bp-76-77 °c (lit.); vapor pressure-143 mmhg ( 30 °c); 91 mmhg ( 20 °c) (sigma) (merck/sigma aldrich) , potassium permanganate (105082 supelco) specifications- grade: acs,reag. ph eur; molar mass- 158.03 g/mole; quality level-300; density -2.70 g/cm3 (20 °c); melting point->240 °c (decomposition); ph value-7 - 9 (20 g/l, h2o, 20 °c); vapor pressure-<0.01 hpa (20 °c); bulk density-1300 - 1600 kg/m3; solubility-64 g/l (emsure®) (merck/sigma aldrich) , ortho-phosphoric acid 85% (100573 supelco) specifications- grade: acs,iso,reag. ph eur; quality level-300; boiling point- 158 °c (1013 mbar); density-;1.71 g/cm3 (20 °c); melting point-21 °c; ph value-0.5 (100 g/l, h2o, 20 °c); vapor pressure-2 hpa (20 °c); viscosity kinematic- 30.5 mm2/s (20 °c) (emsure®) (merck/sigma aldrich) , potassium thiocyanate (105125 supelco) specifications- grade: acs,iso,reag. ph eur; molar mass- 97.18 g/mole; quality level-300; boiling point->400 °c (1013 hpa) not applicable,(decomposition); density-1.890 g/cm3 (20 °c); melting point-173 °c; ph value-5.3 - 8.7 (97.2 g/l, h2o, 25 °c); vapor pressure- <0.1 hpa (20 °c); bulk density- 750 - 1000 kg/m3; solubility->1000 g/l (emsure®) (merck/sigma aldrich) , potassium chromate (104952 supelco) specifications- grade: acs,iso,reag. ph eur; molar mass- 194.2 g/mole; quality level-300; density- 2.73 g/cm3; melting point- 968.3 °c; ph value- 8.5 - 10.0 (50 g/l, h2o, 20 °c); bulk density-1400 kg/m3; solubility-637 g/l (emsure®) (merck/sigma aldrich) , strontium chloride hexahydrate (107865 supelco) specifications- grade: acs; molar mass- 266.62 g/mole; quality level-300; density- 1.95 g/cm3 (20 °c); melting point-61 °c; ph value-5 - 7 (50 g/l, h2o, 25 °c); bulk density-1050 kg/m3; solubility-2058 g/l (emsure®) (merck/sigma aldrich) , sulfate standard solution na2so4 in h2o 1000 mg/l so4 (119813 supelco) specifications- grade: traceable to srm from nist; density- 0.998 g/cm3 (20 °c); (certipur®) (merck/sigma aldrich) , hydroxylamine hydrochloride (55460 sigma-aldrich) =99.0% (rt) specifications- grade- acs; formula weight- 69,49 g/mol; ph of solution (ph) 2.5 - 3.5 at 25º c, 50 mg/ml in h2o; assay- =99.0% (rt) (sigma) (merck/sigma aldrich) , iso-amyl alcohol (100979 supelco) specifications- grade- acs,reag. ph eur; molar mass-88.15g/mole; density-0.81 g/cm3 (20 °c); explosion limit-1.2 - 8 %(v); flash point-43.5 °c; ignition temperature-335 °c; melting point--147 °c; ph value-5.6 (25 g/l, h2o, 20 °c); saturation concentration (air)-11 g/m3 (20 °c) air; vapor pressure 3 hpa (20 °c); viscosity kinematic-5.32 mm2/s (20 °c);solubility-25 g/l (emsure®) (merck/sigma aldrich) , triethanolamine (108379 millipore) specifications-molar mass- 149.19 g/mol; boiling point -360 °c (1013 hpa) (decomposition); density-1.124 g/cm3 (20 °c); explosion limit-3.6 - 7.2 %(v); flash point-179 °c; ignition temperature-325 °c din 51794; melting point-20.5 °c; ph value 10.5 - 11.5 (149 g/l, h2o, 25 °c); vapor pressure-<0.01 hpa (20 °c) (emparta) (merck/sigma aldrich) , zinc standard solution (aas std)- 1000 ppm (119806 supelco) specifications- metrological traceability: directly traceable to nist srm 3168a, lot 120629, certified value as mass fraction 10.007 mg/g ± 0.020 mg/g (certipur®) (merck/sigma aldrich) , iron standard solution (aas std)- 1000 ppm (119781 supelco) specifications- metrological traceability: directly traceable to nist srm 3126a, lot 140812, certified value as mass fraction 987 mg/kg, associated uncertainty, u=k•u (k=2) as mass fraction ± 5mg/kg (certipur®) (merck/sigma aldrich) , manganese standard sol. (aas std)- 1000 ppm (1.19789 supelco) specifications- metrological traceability: directly traceable to nist srm 3132, lot 050429, certified value as mass fraction 986 mg/kg,associated uncertainty, u=k•u (k=2) as mass fraction ± 5mg/kg (certipur®) (merck/sigma aldrich) , copper standard solution (aas std)- 1000 ppm (119786 supelco) specifications-metrological traceability: directly traceable to nist srm 3114, lot 120618, certified value as mass fraction 986 mg/kg, associated uncertainty, u=k•u (k=2) as mass fraction ± 5mg/kg (certipur®) (merck/sigma aldrich) , boron standard solution(aas std)- 1000 ppm (119500 supelco) specifications-metrological traceability: directly traceable to traceable to srm from nist (certipur®) (merck/sigma aldrich) , molybdenum standard solution (aas std)- 1000 ppm (170227 supelco) specifications-metrological traceability: directly traceable to nist srm 3134, lot 130418, certified value as mass fraction 1003 mg/kg, associated uncertainty, u=k•u (k=2) as mass fraction ± 5mg/kg (certipur®) (merck/sigma aldrich) , calcium standard solution (aas std)- 1000 ppm (119778 supelco) specifications-metrological traceability: directly traceable to nist srm 3109a, lot 130213, certified value as mass fraction 9.819 mg/g ± 0.019 mg/g (certipur®) (merck/sigma aldrich) , magnesium standard solution (aas std)- 1000 ppm (119788 supelco) specifications- metrological traceability: directly traceable to nist srm 3131,lot 140110, certified value as mass fraction 982 mg/kg, (certipur®) (merck/sigma aldrich) , sodium standard solution (aas std)- 1000 ppm (170238 supelco) specifications-metrological traceability: directly traceable to nist srm 3152a, lot 200413, certified value as mass fraction 988 mg/kg,associated uncertainty, u=k•u(k=2) as mass fraction ± 6 mg/kg (certipur®) (merck/sigma aldrich) , lead standard solution (aas std)- 1000 ppm (1.19776 supelco)specifications-metrological traceability: directly traceable to nist srm 3128, lot 101026, certified value as mass fraction 987 mg/kg, associated uncertainty, u=k•u (k=2) as mass fraction ± 5mg/kg (certipur®) (merck/sigma aldrich) , cadmium standard solution (aas std)- 1000 ppm (1.19777 supelco)specifications- metrological traceability: directly traceable to nist srm 3108, lot 130116, certified value as mass fraction 984 mg/kg, associated uncertainty, u=k·u (k=2) as mass fraction ± 5mg/kg (certipur®) (merck/sigma aldrich) , nickel standard solution (aas std)- 1000 ppm (1.19792 supelco) specifications- metrological traceability: directly traceable to nist srm 3136, lot 120619, certified value as mass fraction 988 mg/kg, associated uncertainty, u=k·u (k=2) as mass fraction ± 5mg/kg (certipur®) (merck/sigma aldrich) , chromium standard solution (aas std)- 1000 ppm: (119779 supelco) specifications- metrological traceability: directly traceable to nist srm 3112a, lot 170630, certified value as mass fraction 990 mg/kg, associated uncertainty, u=k•u (k=2) as mass fraction ± 5mg/kg (certipur®) (merck/sigma aldrich) , arsenic standard solution (aas std)- 1000 ppm: (119773 supelco) specifications- metrological traceability: directly traceable to nist srm 3103a, lot 220201, certified value as mass fraction 10.002 mg/g ± 0.024 mg/g (certipur®) (merck/sigma aldrich) , mercury standard solution (aas std)- 1000 ppm (170226 supelco)specifications- metrological traceability: directly traceable to nist srm 3133, lot 160921, certified value as mass fraction 948 mg/kg, associated uncertainty, u=k•u (k=2) as mass fraction ± 8mg/kg (certipur®) (merck/sigma aldrich) , methanol for analysis (106008 safc) specifications-grade- eur,bp,jpe,nf; molar mass-32.04 g/mol; boiling point-64.5 °c (1013 hpa); density- 0.792 g/cm3 (20 °c); evaporation number-1.9; explosion limit-5.5 - 44 %(v); flash point-9.7 °c;ignition temperature-420 °c din 51794; melting point--97.8 °c; vapor pressure-128 hpa (20 °c);viscosity kinematic-0.54 - 0.59 mm2/s (20 °c) no data available. (emprove®) (merck/sigma aldrich) , potassium hexacyanoferrate(ii) trihydrate (104984 supelco) specifications-grade-acs,iso,reag. ph eur; quality level-300; molar mass-422.39 g/mol; density-1.85 g/cm3 (20 °c) (anhydrous substance); melting point-70 °c elimination of water of crystallization; ph value-8.0 - 10 (211 g/l, h2o, 25 °c) (anhydrous substance); bulk density-950 -1050 kg/m3; solubility-289 g/l (emprove®) (merck/sigma aldrich) , potassium hydroxidepellets for analysis (105033 supelco) specifications- quality level-300; molar mass- 56.11 g/mol; density-2.04 g/cm3 (20 °c); melting point-360 °c; ph value-13.5 (5.6 g/l, h2o, 25 °c); vapor pressure-1 hpa (719 °c); solubility-1130 g/l (emprove®) (merck/sigma aldrich) , potassium chloride solution (nominal reference material for the measurement of electrolytic conductivity (c=0.01 mol/l) 1.01203.0500 (certipur®) (merck/sigma aldrich) , perchloric acid 70-72% (100519 supelco) specifications- grade- acs, iso, reag. ph eur; quality level-300; boiling point-198.7 °c (1013 hpa); density-1.68 g/cm3 (20 °c); melting point- -18 °c (emsure®) (merck/sigma aldrich) , potassium peroxodisulfate for analysis (<= 0.001% n) (105092 supelco) specifications- grade- acs, reag. ph eur; quality level-300; density-2.477 g/cm3; melting point-100 °c (decomposition); ph value-2.5 - 4.5 (27 g/l, h2o, 25 °c); vapor pressure-<0.1 hpa (25 °c); bulk density-1150 kg/m3; solubility-50 g/ (emsure®) (merck/sigma aldrich) , selenium powder, - 100 mesh, specifications-purity -99.99% trace metals basis (229865 sigma-aldrich); molecular weight-78.96g/mol. (sigma) (merck/sigma aldrich) , mercury(ii) oxide red, for analysis (1.04466 supelco) specifications-molecular weight:216.59; assay:=99.0% (complexometric);solubility:0.052 g/l (emsure®) (merck/sigma aldrich) , extran® [1075531000] ma 02 liquid, neutral, concentrate 60755305001730 (merck) (merck/sigma aldrich) , ammonium standard solution [1250230100] traceable to srm from nist1.00 mg/l nh4-n in h2o (merck) (merck/sigma aldrich) , reduced iron powder, electrically reduced (iron foundry)or =99%, powder (fine), reduced (merck) (merck/sigma aldrich) , jack bean meal [12352204] [j0125] specifications- molecular weight: 220 kda1; pi: 6.2; extinction coefficient: e 1% = 11.4 (280 nm, 100 mm nacl) 2pi: 4.5, 4.7, 5.1, 5.53 (sigma) (merck/sigma aldrich) , methyl purple indicator solution 277339 sigma-aldrich; specifications- molecular weight-1391.41 (sigma) (merck/sigma aldrich) , sodium carbonate volumetric standard [1024050080], secondary reference material for acidimetry, traceable nist srm (certipur®) (merck/sigma aldrich) , sodium dodecyl benzene sulphate [515-42-4] pharmaceutical secondary standard; certified reference material (certipur®) (merck/sigma aldrich) , carbon tetrachloride anhydrous, =99.5% (289116 sigma-aldrich) specifications-molecular weight:153.82; assay:=99.5%; bp:76-77 °c (lit.); vapor pressure:143 mmhg ( 30 °c); 91 mmhg ( 20 °c) (merck/sigma aldrich) , carbon disulfide (1.02214 supelco); specifications-grade-reag. ph eur; assay:=99.9% (gc);bp:46.5 °c/1013 hpa; vapor pressure: 398 hpa ( 20 °c) (emsure®) (merck/sigma aldrich) , glassgoods:- beaker heavy duty low form (borosil ®) , beaker heavy duty low form (borosil ®) , beaker heavy duty low form (borosil ®) , beaker heavy duty low form (borosil ®) , beaker heavy duty low form (borosil ®) , measuring cylinders, graduated, with hexagonal base, accuracy as per astm, class a, with certificate graduated, with hexagonal base (borosil ®) , measuring cylinders, graduated, with hexagonal base, accuracy as per astm, class a, with certificate graduated, with hexagonal base (borosil ®) , measuring cylinders, graduated, with hexagonal base, accuracy as per astm, class a, with certificate graduated, with hexagonal base (borosil ®) , measuring cylinders, graduated, with hexagonal base, accuracy as per astm, class a, with certificate graduated, with hexagonal base (borosil ®) , measuring cylinders, graduated, with hexagonal base, accuracy as per astm, class a, with certificate graduated, with hexagonal base (borosil ®) , measuring cylinders, graduated, with hexagonal base, accuracy as per astm, class a, with certificate graduated, with hexagonal base (borosil ®) , measuring cylinders, graduated, with hexagonal base, accuracy as per astm, class a, with certificate graduated, with hexagonal base (borosil ®) , volumetric flasks with i/c glass stopper accuracy as per class a, usp (us pharmacopoeia), with certificate (borosil ®) , tube light (philips) ( 40 watt.) (as required) (per piece) (borosil ®) , volumetric flasks with i/c glass stopper accuracy as per class a, usp (us pharmacopoeia), with certificate (borosil ®) , volumetric flasks with i/c glass stopper accuracy as per class a, usp (us pharmacopoeia), with certificate (borosil ®) , flat bottom flask with teflon screw cap (borosil ®) , funnels plain 600 angle, short stem (borosil ®) , glassco silica crucibles, (glassco) , standard borosilicate glass gooch crucible (borosil ®) , standard keltube fitted for pelican instruments (palican) , conical flasks, heavy duty, conical (erlenmeyer) narrow mouth, (borosil ®) , conical flasks, heavy duty, conical (erlenmeyer) narrow mouth, (borosil ®) , conical flasks, heavy duty, conical (erlenmeyer) narrow mouth with stopper, iso (borosil ®) , heavy duty filtering flask, bolt neck with tubulation (borosil ®) , heavy pipettes measuring (serological type), accuracy as per class a, with certificate, astm 1293-02 nabl certified (borosil ®) , heavy pipettes measuring (serological type), accuracy as per class a, with certificate, astm 1293-02 nabl certified (borosil ®) , heavy pipettes measuring (serological type), accuracy as per class a, with certificate, astm 1293-02 nabl certified (borosil ®) , heavy pipettes measuring (serological type), accuracy as per class a, with certificate, astm 1293-02 nabl certified (borosil ®) , heavy pipettes measuring (serological type), accuracy as per class a, with certificate, astm 1293-02 nabl certified (borosil ®) , pipettes, transfer, volumetric, class a, astm e- 969 02 nabl certified (borosil ®) , pipettes, transfer, volumetric, class a, astm e-969-02 nabl certified (borosil ®) , pipettes, transfer, volumetric, class a, astm e-969-02 nabl certified (borosil ®) , pipettes, transfer, volumetric, class a, astm e-969-02 nabl certified (borosil ®) , pipettes, transfer, volumetric, class a, astm e-969-02 nabl certified) (borosil ®) , pipettes, transfer, volumetric, class a, astm e-969-02 nabl certified (borosil ®) , burette with straight bore ptfe key stopcock, class a (borosil ®) , burette with straight bore ptfe key stopcock, class a (borosil ®) , walters gooch crucible holder and buckner funnel holder (optimus) , laboratory articles:- [wha1001150] whatman® qualitative filter paper, grade 1 circles, pack of 100 (sigma aldrich) , [wha1440150] whatman® quantitative filter paper, ashless, grade 40, pack of 100 (sigma aldrich) , whatman 1441-150 41 ashless quantitative filter paper, 20-25um, 15cm; 100/box (cole palmer) , [wha1442150] whatman® quantitative filter paper, ashless, grade 42 (sigma aldrich) , [28462-126] grade 5 qualitative filter paper standard grade, pack of 100 (avantar vwr) , wha10538018whatman no.12 fluted filter paper whatman qualitative filter paper, grade cf 12. sheets, w × l 580 mm × 580 mm,pack of 100. (sigma aldrich) , eppendorf pipette dispenser/seripator (eppendorf) , digital burette (eppendorf) , pipette controller (variable volume) with microtip (1000pcs) (eppendorf) , pipette controller (variable volume) with microtip (1000pcs) (eppendorf) , separating funnel with teflon screw adjustment (borosil ®) , vacuum desiccators (borosil ®) , vacuum desiccators with attachment to pump (borosil ®)