annual rate contract for supply of chemicals, glassware and gases , chemicals , sigma-aldrich , fisher scientific , fluka , across , sd fine chemicals , qualigens , alfa-aesar , vetec , srl , spectrochem , avra , merck , molychem , himedia , thermo fisher invitrogen , otto chemic , merck life sciences , qiagen , ils , santa-cruz (bi-biotech) , bd biosciences , tci chemicals , cole-parmer , life technology , abcam novas , promega , r & d system , neb , loba , cdh , hampton research , mp biomedicals , takara , roche , pall corporation , cell signalling technology , fermantas , lonza , genscript , bio-rad , biolegend , dako , ge healthcare , eurofines , genei , idtcytiva , finar , strem , vwr , bld pharm , fisher , merck , sdfcl , rankem , hi-media , hysel , avocado & lancaster, invitrogen thomas baker , titan media & titan chemicalss , medox , millipore , genetix , nice , labmate , sisco chem , nanoshel , bio-rad , ubs , agile , prolab , geno , reinste , lcgc , genaxy , fbs , mp , infusil , corning /costar / pyrex , biochem , qiagen, krishgen biolink , glassware , ils , abdos , thermo , genetix , genaxy , borosil , riviera , glassco , merck , duran , jsil , asgi , thermo fisher , blue star , axiva , cole-parmer , infusil , corning , brand , sigma-aldrich , dewsil , harsh & co. (harco) , tarson , vensil , cornsil labman , jennson , hampton research , perfit , jsgw , jain biological , erba biohit , amber , tensil , jhasil , gripsil , abron , ubs , hi-media , merck , fisher , spinchrom , fbs , astra , pall , glacier , invitrogen , glasil , omson , kv bio , gases , n2, co2, ar, he, h2, zero air. calibration gases: h2s, co2, so2, no2, nh3, butane, xe, krypton, fluorine, ar + h2 mixed gas, nitrogen + h2 mixed gas and other mixture gases etc. , liquid nitrogen , liquid helium , 5n purity gases, n2, o2, ar, n2+h2, ar+h2, sf6, cf4, he , methane, high purity dry oxygen, dry air, dry nitrogen