bids are invited for extra pure chemicals for laboratory , 1 1,2,4-tcb, hplc, cas 120-82-1, 1 l 2 1,2,4,5 tetramethyl benzene,100g,merck 8.08624.0100 or aldrich t1,960-7 3 1-hexene cas 592-41-6, cn 320323-1l 4 1-methylnaphthalene anal. std. cas 90-12-0, cn 45795-250mg 5 isooctane anhydrous,min 99.8 percent,1l crm grade 6 2-ethyltoluene,cat no.e49401,25g crm grade ultra pure chemical 7 2-hexanone methyl butyl ketone, gc grade,aldrich 103004, merck 8.04398.0100-100 ml or equal 8 9-methyl anthracene synthesis, 5gm, merck 8.21249.0005 or equal 9 dibenzothiophene,25g,cat no.d32202 crm grade ultra pure chemical 10 ethylbenzene anal. std. cas 100-41-4, cn 03079-5ml 11 mesitylene anal. std. cas 108-67-8, cn 63908-5ml 12 m-xylene anal. std. cas 108-38-3, c 95670-5ml 13 n-dodecane ,purity min 99.5 percent,500ml 14 n-hexadecane for synthesis,500ml sd 38479 l05 or equal 15 n-nonane,purity 99 percent,250ml,merck 8.06838 or equivalent 16 phenanthrene zone refined 99 percent pure,100 gms, merck 8.22122.0100 17 potassium hydrogen phthalate, ar or gr, 500gm 18 p-xylene 99 percent purity 1 ltr ,fluka cat 95682, w or certificate or equivalent 19 sodium carbonate 500g, gr merck 61778705001046 or equal 20 toluene hplc or chromatographic grade 1000ml,with minimum assay purity 99.8% and refractive index at 20 deg c. between 1.496-1.497 or e quivalent 21 o-xylene anal. std.cas 95-47-6, cn 95660-5ml total quantity : 32