purchase of laboratory instruments/ equipments / accessories /chemicals/glass wares/ plastic wares and other laboratory articles , laboratory chemicals , activated charcoal-p free: substances soluble in ethanol, losson drying(120°c) approx. 3.8%, brand: merck/ sigma aldrich. grade: gr/ emplura/ ar/ emparta 500g , ammonium bi-carbonate: assay=99.0%,ph7.0–8.5at79.1g/lat25°c,water solubility 79.1 g/l at 20 °c - completely soluble, lr. brand: merck/ sigma aldrich. capacity: 500g. , ammonium acetate: assay (ch3coonh4)nlt 97%, ph-value (5%w/v; water)6.7 to 7.3, chloride (cl)nmt 0.0005%, sulfate (so4)nmt 0.001%, nitrate (no3)nmt 0.001%, residue onignition (assulfate)nmt 0.01 %, insoluble matter nmt 0.005 %. brand: merck/ sigma aldrich. grade: ar/ emparta 500g , ammonium fluoride: assay (nh4f)nlt 95 %, ph-value (5% w/v; water)nlt 5.7, hex fluorosilicate (sif6)nmt 0.2%, sulfate(so4)nmt 0.02%, iron(fe)nmt 0.002%, lead(pb)nmt0.002%, non-volatile substances nmt 0.02%.merck/ sigma aldrich. grade: ar/emparta 500g , ammonium iron sulphate hexa hydrate: assay [ (nh4) 2fe(so4) 2.6h2o] 98.5 to 101.5, insoluble matter nmt 0.01%, iron (fe+++)nmt 0.01%, zinc (zn)nmt 0.003%, magnesium (mg)nmt0.002%, test solution [10%w/v; the solution is clear &complete. brand: merck/ sigma aldrich. grade: ar/ emparta 500g , ammonium heptamolybdate tetrahydrate : (nh4) 6mo7o24.4h20: assay( as moo3)81 to 83, chloride (cl)nmt 0.002 %, nitrate (no3)conforms, sulfate (so4)nmt 0.02%, lead (pb)nmt 0.001%, magnesium (mg)nmt 0.005%,potassium (k)nmt0.01%, sodium (na)nmt 0.01%, insoluble matter nmt 0.005 %, heavymetals (aspb)nmt 0.001%, phosphate, arsenate, silicate ( assio2)nmt 0.001 %. brand: merck/ sigma aldrich. grade: ar/ emparta 100g , antimony potassium tertarate (k(sbo) c4h4o6.1/2h20) . brand: merck/ sigma aldrich. grade: ar/ emparta 250 g , l-ascorbic acid:assay (c6h8o6)99.6 %, heavy metals (as pb)0.001 %, residue on ignition (as sulfate)0.1 %. brand: merck/ sigma aldrich. grade:ar/ emparta 100g , ascorbic acid: purity (assay)> 99% , specific rotation + 20.5° to +21.5°merck/ sigma aldrich. grade: ar/emparta 100g , azomethine h: reagent for the determination of boron.brand: merck/ sigma aldrich/ . grade: ar/ emparta 10g , barium chloride dihydrate: assay (bacl2.2h2o)nlt 99 %, ph-value (5% w/v; water)5.2 to 8.2, insoluble matter nmt 0.005 %, heavymetals (as pb)nmt0.0005%, strontium (sr)nmt 0.1%, oxidizing substances (as no3)nmt 0.005 %, loss on drying (150°c)14 to 16. brand: merck/ sigma aldrich/ . grade: ar/ emparta 500g , calcium chloride dihydrate: assay(cacl2.2h2o; complexo metric) : 99 to 105, ph-value (5%; water,25°c) : 4.5 to 8.5, heavymetals (aspb) : nmt 0.0005%, oxidisable substances (as no3) : nmt 0.003%merck/ sigma aldrich. grade: ar/emparta 500g , calcium chloride fused: assay (cacl2;on dry substance) : nlt 98 %, heavy metals (as pb) : nmt 0.002%, water absorption capacity [24hr,rh-80%]: nlt 20%, appearance: white, hard hygroscopic lumps. (1– 2 cms) merck/ sigma aldrich. grade: ar/emparta 500g , calcon carboxylic acid metal indicator: 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)=9merck/ sigma aldrich. grade: ar/emparta 25g , boric acid: assay (h3bo3) ; chloride (cl)nmt = 0.0003 %; phosphate (po4)nmt = 0.0005 %; sulfate (so4)nmt = 0.0005 %; heavy metals (as pb)nmt = 0.0005 %; pb (lead)nmt = 0.001 %. brand: merck/ sigma aldrich/ . grade: ar/ emparta 500g , boron standard solution (aasstd) -1000ppm: traceabletosrmfromnisth3bo3inh2o1000mg/l bcertipur® metrological traceability: directly traceable to nistsrm3107, lot190605, certified value as mass fraction 1001 mg/kg, associated uncertainty, u= k·u(k=2)as mass fraction ± 6mg/kg with crm certificate. brand: merck/ sigma aldrich/ . grade: gr/ certipur®/ emparta 100ml , bromocresol green indicator: transitionrange:ph3.6:yellow-greenph5.2:blue specific extinction (e 1%/1cm; lambda : nlt 230 specific extinction (e 1%/1cm; lambda: nlt 490 loss on drying (105°c) : nmt 3%. brand: merck/ sigma aldrich/ . grade: ar/ emparta 5g , ph4.0 buffer solution: clear, colourless solution, ph-value of solutionat 20°c: 3.98 to 4.02 with certificate of analysis. brand: merck/ sigma aldrich/ . grade: ar/ emparta 450ml , ph7.0 buffer solution: clear, colourless solution, ph-value of solution at 20 °c : 6.98 to 7.02 with certificate of analysis. brand: merck/ sigma aldrich/ . grade: ar/ emparta 450ml , ph9.0 buffer solution: clear, colourless solution, ph-value of solutionat 20°c: 8.98 to 9.02 with certificate of analysis. brand: merck/ sigma aldrich/ . grade: ar/ emparta 450ml , copper standard solution (aas std)-1000 ppm: metrologicaltraceability:directlytraceabletonistsrm3114, lot 120618, certified value as mass fraction 986 mg/kg, associated uncertainty, u = k·u(k=2)as mass fraction ±5 mg/kg; with crm certificate. brand: merck/ sigma aldrich/ . grade: gr/ certipur®/ emparta 100ml , devarda’s alloy: total nitrogen( n) : = 0.001%merck/ sigma aldrich. grade: ar/emparta 250 gm , diethylene triamine penta acetic acid (dtpa) : assay(complex metric, calc. on anhydrous substance)100%, ph-value (saturated solution) : 2.4. brand: merck/ sigma aldrich/ . grade: ar/ emparta 100g , diphenylamine indicator: purity(gc) :nlt98%,meltingrange:52.5to54,sulfatedash :nmt0.03%, loss on drying (over silica gel) : nmt 1%, substances insoluble in ethanol: conformsmerck/ sigma aldrich. grade: ar/emparta 100g , erichrome black t: identity(ir) : conforms, clarity of solution: conforms, specific extinction (e 1%/ 1 cm; on dried : nlt 300, loss on drying (105°c) : nmt 1%, suitability as a complex metric indicator: conformsmerck/ sigma aldrich. grade: ar/emparta25g , ethanol-absolute (95%pure) : purity: 99%, acidity and alkalinity: =30, density (d 20°c /20°c) : 0.790 – 0.793. brand: merck/ sigma aldrich/ . grade: ar/ emparta 500ml , ethylene diamine tetra acetic acid di-sodiumsalt (edta) : assay (c10h14n2na2o8; : 99 to 101, ph of a 5% solution at 25.0°c: 4 to 6 , insoluble matter : nmt 0.005 %, nitrilotriacetic acid: nmt0.1, heavymetals (aspb) : nmt 0.005%, iron(fe): nmt 0.01 %merck/ sigma aldrich. grade: ar/emparta 1 kg , extran: density 1.057-1.067, ph value 6-8, foam volume > 80ml. brand: merck/ sigma aldrich/ . grade: ar/ emparta 5l , glacial acetic acid: assay(ch3cooh) :nlt 99.7% ,non volatile substances: nmt 0.001 %, titratable base : nmt 0.0004 meq/g, colour (apha): nmt 10 hu, heavymetals (aspb): nmt 0.00005%, acetic anhydride: nmt 0.1%. brand: merck/ sigma aldrich/ . grade: ar/ emparta. 2.5l , gum acacia. brand: merck/ sigma aldrich/ . grade: ar/ emparta 500g , hexamethylene tetramine: assay (c6h12n4) : 104.6 %, ph-value (10% w/v; water): 9, heavy metals (as pb) : 0.001 %, loss on drying (105°c): 1.9 %merck/ sigma aldrich. grade: ar/emparta 500 g , hydrochloric acid (concentrated) -35: assay (hcl)nlt: 35%, heavymetals (as pb) : nmt 0.001%, residue on ignition (as sulfate)nmt: 0.005 %. brand: merck/ sigma aldrich/ . grade: ar/ emparta 2.5l , hydroxylamine hydrochloride: assay (honh3cl): nlt 98 %, ph-value (5% w/v; water): 2.5 to 3.5, titrable free acid : nmt 0.25 meq/g, total sulfur (as so4) : nmt 0.005%, residue on ignition (as sulfates)nmt 0.05 %merck/ sigma aldrich. grade: ar/emparta 100g , iron standard solution (aas std)- 1000 ppm: metrological traceability: directly traceable to nistsrm3126a, lot140812, certified value as mass fraction 987 mg/kg, associated uncertainty, u = k·u (k=2)as mass fraction ± 5 mg/kg with crm certificate. brand: merck/ sigma aldrich/ . grade: gr/ certipur®/ emparta 100ml , manganese standard sol. (aas std)- 1000 ppm: metrologicaltraceability:directlytraceabletonistsrm3132, lot050429, certified value as mass fraction 986 mg/kg, associated uncertainty, u=k·u(k=2)as mass fraction ± 5mg/kg; with crm certificate. brand: merck/ sigma aldrich/ . grade: gr/ certipur®/ emparta 100ml , methyl red indicator: transition range: ph 4.4: red, ph 6.2 : yellow specific extinction (e 1%/1cm; lambda max1 524 nm; ph 4.4)1577.1, specific extinction (e 1%/1 cm; lambdamax2430nm; ph6.2): 733.3. brand: merck/ sigma aldrich/ . grade: ar/ emparta 25g , monobasic monohydrate calcium phosphate: merck/ sigma aldrich. grade: ar/emparta 25g , nitric acid–69% (concentrated) : assay(hno3) :68to70,arsenic(as) :nmt0.000001%, heavymetals (as pb) : nmt 0.00002%, residue on ignition (as sulfate) : nmt 0.0005%. brand: merck/ sigma aldrich/ . grade: ar/ emparta 2.5l , ortho phosphoric acid-85%: assay (h3po4)99%, heavymetals (as pb) : 0.001%, insoluble matter 0.001 %. brand: merck/ sigma aldrich/ . grade: ar/ emparta 2.5l , p-nitrophenol (4-nitrophenol) : faint yellow to yellow to beige, powder or crystals , purity>= 99.0 %. brand: merck/ sigma aldrich/ . grade: ar/ emparta 100g , potassium chloride: assay (kcl)nlt 99 %, ph-value (5%w/v; water) : 5.5 to 8.5, heavy metals (as pb)nmt 0.002 %merck/ sigma aldrich. grade: ar/emparta 500g , perchloric acid: assay (hclo4): 60 to 62, colour (apha): nmt 10 hu, phosphate & silicate (as sio2): nmt 0.0005 %, residue on ignition (as sulfates) : nmt 0.003%, heavymetals (as pb) : nmt 0.0001%. brand: merck/ sigma aldrich/ . grade: ar/ emparta 500ml , phosphorus standard solution (aas std) - 1000 ppm: the expanded measurement uncertainty is ± 0.4 % (k=2 coverage factor for 95% coverage probability) . the certified value is traceable to primary standard nist srm 84l; with crm certificate. brand: merck/ sigma aldrich/ . grade: gr/ certipur®/ emparta 100ml , potassium dichromate: assay (k2cr2o7): nlt 99 %, insoluble matter : nmt 0.005 %, loss on drying (105°c) : nmt 0.05%, iron (fe) : nmt 0.001%, calcium(ca) : nmt 0.003%, sulfate(so4) :nmt 0.005 %. brand: merck/ sigma aldrich/ . grade: ar/ emparta 500g , potassium dihydrogen orthophosphate: assay (kh2po4); nlt 99 %, ph-value (5% w/v; water): 4.1 to 4.5, loss on drying: nmt 0.2%, insoluble matter: nmt 0.01 %, heavy metals (as pb):nmt 0.001 %merck/ sigma aldrich. grade: ar/emparta 500g , potassium hexacyanoferrate (ii)(potassium ferrocyanide) : merck/ sigma aldrich. grade: ar/emparta 500g , potassium hydrogen phthalate: assay (c8h5ko4; dried basis ): 99 %, ph-value (0.05m; water): 4.00, heavy metals (as pb) : 0.0004 %,merck/ sigma aldrich. grade: ar/emparta 500g , potassium permanganate: identity k: conforms, mno4: conforms assay (kmno4)99%, sulfate(so4)0.01%. brand: merck/ sigma aldrich/ . grade: ar/ emparta 500g , potassium standard solution (aas std)- 1000 ppm: metrological traceability: directly traceable to nistsrm3141a, lot140813, certified value as mass fraction 986mg/kg, associated uncertainty, u= k·u(k=2)as mass fraction ± 5mg/kg. with crm certificate.brand: merck/ sigma aldrich/ . grade: gr/ certipur®/ emparta 100ml , potassium sulphate: assay (k2so4): nlt 99 %, ph-value (5% w/v; water): 5.5 to 8.5, insoluble matter : nmt 0.01 %, total nitrogen (n): nmt 0.0005 %, heavy metals (as pb) : nmt 0.0005 %. brand: merck/ sigma aldrich/ . grade: ar/ emparta 500g , silver sulphate: assay (agso4 : argentometric) ; nlt 98 %, substances insoluble : nmt 0.02 %, nitrate (no3) : nmt 0.003 %, iron (fe): nmt 0.001 %, substances not precipitated : nmt 0.03 % merck/ sigma aldrich. grade: ar/emparta 25g , sodium bicarbonate-p free: assay (nahco3; acidimetric, calc.: 99.7 to 100.3, phosphate (po4) : nmt 0.001%, insoluble matter: nmt 0.015%, heavy metals (as pb) : nmt 0.0005 %, sulfur compounds (as so4): nmt 0.003 %, ammonium (nh4): nmt 0.0005 %. brand: merck/ sigma aldrich/ . grade: ar/ emparta 500g , sodium carbonate: assay (na2co3; on dried sub.) : nlt 99%, total sulfur (asso4) : nmt 0.003 %, heavy metals (as pb): nmt 0.0005 %, loss on drying(285°c; 15 min.):nmt 1 %, insoluble matter:nmt 0.01 %, silicate (as sio2) : nmt 0.005%. brand: merck/ sigma aldrich/ . grade: ar/ emparta 500g , sodium chloride: assay (nacl)nlt 99% 100.74%, ph-value (5%w/v; water)5 to 96.17, insoluble matter nmt 0.005 % - 0.002 % brand: merck/ sigma aldrich grade: ar/ emparta 500g , sodium hexa meta phosphate: assay (as p2o5) 72.7%, identity na: passes test p2o5: passes test, soluble iron 0.1 %brand: merck/ sigma aldrich. grade: ar/ emparta . 100 ml , sodium hydroxide pellets: assay (naoh)nlt 99.6%, nitrogen compounds (n)nmt 0.001% - 0.0004%, heavymetals (as pb)nmt 0.002% - 0.0006 %. brand: merck/ sigma aldrich/ . grade: ar/ emparta 500g , sodium molybdate di-hydrate: assay (na2moo4.2h2o)100.1%, ph-value (1%w/v; water)7.6. brand: merck/ sigma aldrich. grade: ar/ emparta . 100 gm , sodium thiosulphate pentahydrate: assay (na2s2o3.5h2o)nlt 98.5% - 100.32%, test solution (10% w/v; water)the solution is clear and colourless. brand: merck/ sigma aldrich. grade: ar/ emparta . 500 gm , standard sulphate solution(aas std) - 1000 ppm: traceable to srm from nist na2so4 in h2o with crm certificate. brand: merck/ sigma aldrich/ . grade: gr/ certipur®/ emparta100 ml , sululfuric acid-98% (concentrated) : assay (h2so4) : 97.94 %, kmno4 reducing substances (as so2)nmt 0.0002 %, residue on ignition (as sulfate)nmt 0.0005 %.brand: merck/ sigma aldrich/ . grade: ar/ emparta 2.5l , tin granules: assay = 99.5%, other foreign metals = 0.1%. brand: merck/ sigma aldrich. grade: ar/ emparta 100g , tin(ii)chloride dihydrate: assay (sncl2.2h2o) : 98 to 103, calcium (ca) : nmt 0.005%, potassium (k): nmt 0.005 %, sodium (na): nmt 0.01 % brand: merck/ sigma aldrich. grade: ar/ emparta . 100 gm. , triethanolamine solution: purity (gc)nlt: 99. %, colour : nmt 10 hu,sulphate (so4): nmt: 0.002%, sulfate dash (600°c) : nmt 0.005%, water (kf) : nmt 0.2% brand: merck/ sigma aldrich. grade: ar/ emparta 500 ml , zinc standard solution (aas std)- 1000 ppm: metrological traceability: directly traceable to nistsrm3168a, lot120629, certified value as mass fraction 984mg/kg, associated uncertainty, u=k·u(k=2)as mass fraction ± 5mg/kg; with crm certificate. brand: merck/ sigma aldrich/ . grade: gr/ certipur®/ emparta 100 ml , zinc sulphate heptahydrate: assay (znso4.7h2o)100%, ph-value (5%w/v;water) : 4.9, substances insoluble in water: 0.001%,total nitrogen(n) : 0.0004 %. brand: merck/ sigma aldrich/ . grade: ar/ emparta 500g , glass wares , measuring cylinders, graduated, single metric scale, with pour out, with hexagonal base, class a, with certificate. (borosilicate glass)5ml borosil , measuring cylinders, graduated, single metric scale, with pour out, with hexagonal base, class a, with certificate. (borosilicate glass) 10ml borosil , measuring cylinders, graduated, single metric scale, with pour out, with hexagonal base, class a, with certificate. (borosilicate glass)50ml borosil , measuring cylinders, graduated, single metric scale, with pour out, with hexagonal base, class a, with certificate. (borosilicate glass) 100 ml borosil , measuring cylinders ,graduated, single metric scale ,with pour out, with hexagonal base ,class a, with certificate.(borosilicate glass) 500 ml borosil , measuring cylinders, graduated, single metric scale, with pour out ,with hexagonal base, class a, with certificate. (borosilicate glass) 1 l borosil , flasks, erlenmeyer, conical, narrow mouth. (borosilicate glass) 100ml borosil , flasks, erlenmeyer, conical, narrow mouth. (borosilicate glass)150ml, borosil. , flasks, erlenmeyer ,conical, narrow mouth.(borosilicate glass)250 ml, borosil. , flasks ,erlenmeyer, conical, narrow mouth.(borosilicate glass)500 ml,borosil. , flasks, volumetric ,with interchangeable solid glass stopper, accuracy as per class a, with certificate.(borosilicate glass) 100 ml, borosil. , flask volumetric with interchangeable solid glass stopper accuracy as per class a with certificate. 25 ml borosil. , flasks, volumetric, with interchangeable solid glass stopper, accuracy as per class a, with certificate. (borosilicate glass)250 ml, borosil. , flasks, volumetric, with interchangeable solid glass stopper, accuracy as per class a, with certificate.(borosilicate glass)1 l, borosil. , beakers, griffin, low form, with spout.(borosilicate glass)100 ml, borosil. , beakers, griffin, low form, with spout.(borosilicate glass)250 ml, borosil. , beakers, griffin, low form, with spout.(borosilicate glass)500 ml, borosil. , beakers, griffin, low form, with spout.(borosilicate glass)1 l, borosil. , beakers, griffin, low form, with spout.(borosilicate glass)2 l, borosil. , auto burette, with glass stopcock, class a, with individual calibration certificate. complies with is1997/ iso385. supplied with reservoir and rubber bellow, with automatic zero facility. (borosilicate glass)50 ml, borosil. , pipettes, measuring (mohr types) , class a, with works certificate. (borosilicate glass)1 ml, borosil. , pipettes, measuring (mohr types) , class a, with works certificate. (borosilicate glass) 2 ml, borosil. , pipettes, measuring (mohr types) , class a, with works certificate. (borosilicate glass)5 ml, borosil. , pipettes, measuring (mohr types) , class a, with works certificate. (borosilicate glass)10 ml, borosil. , funnels,plain,60°angle,short stem.(borosilicate glass)50 mm, borosil. , funnels,plain,60°angle,short stem.(borosilicate glass)75 mm, borosil. , funnels,plain,60°angle,shortstem.(borosilicate glass)100 mm, borosil. , test tube graduatted class a, accuracy, with i/c glass stopper,with certificate. (borosilicate glass)25 ml, borosil. , glass rods7mmx 205 mm, borosil , reagent bottle, wide mouth, graduated with screw cap. (borosilicate glass)borosil 1 l , reagent bottle narrow mouth, graduated with screw cap, amber.(borosilicate glass)1 l borosil , reagent bottle narrow mouth, graduated with screw cap, amber.(borosilicate glass)250 ml, borosil. , glass cuvette (quartz)3.5 ml, size: 45mm x 12.5 mm x 12 mm , plastic wares and other laboratory articles , beaker with spout(material-pp)500 ml, tarson. , beaker with spout(material-pp)1000 ml, tarson. , volumetric flask(material-pp)25 ml, tarson. , volumetric flask(material-pp)1000 ml, tarson. , measuring cylinder graduated, with pour out.(material-pp)50 ml, tarson. , measuring cylinder graduated, with pour out.(material-pp)100 ml, tarson. , funnels, plain, 60°angle, short stem. (material-pp)65mm, tarson. , carboy with stop cock (material-pp/ldpe)5 l, tarson. , carboy with stop cock. (material-pp/ldpe)10l, tarson. , carboy with stop cock. (material-pp/ldpe)20l, tarson. , narrow mouth bottles (material-pp)good and hard 100 ml 100 ml, tarson. , pipette controller bul bs for each 1ml, 2ml, 5 ml and 10 ml pipettes, good & hard. , ldpe plastic wash bottles 500 ml , burette stand with double clamp , plastic tray size: 18”x12”x1.5” good and hard size: 18”x12”x1.5” , filter paper -1 (packof500 sheets)size: 460 mm x 570 mm whatman , filter paper -42 (pack of 100 sheets)size: 460 mm x 570 mm, whatman. , tissue roll length: 150mtrs. good quality length: 150mtrs , 1 mm sieve1 mm perforation. good & hard , laboratory instruments , kjeldahl test tube holder: test tube holder for labquestkjeldahl distillation unit, model kdi040/kbd080 automatic kjeldahl distillation, digestion unit , vacuum cleaner: combo cordless vacuum cleaner, wet & dry automatic floor washer & handheld cordless vacuum for all corners of home, with lcd display, smart app & voice control, capacity - 142 g, runtime - 40 minutes. form factor - stick, product dimensions 68l x 31w x 34h centimeters, noise level -70 db. dimensions 68l x 31w x 34h centimeters. , refrigerator: capacity - ?653 litres, annual energy consumption - ?547 units per year, refrigerator fresh food capacity - 409 litres, freezer capacity - ?244 litres, noise level - 40 db,special features - ?energy efficient, inverter compressor, frost free, automatic defrost, low noise, adjustable shelves, large capacity:650-670ltrs.