Profile: Crescent Chemical Co. Inc. manufacturer and supplies laboratory chemicals that include serva/nordmark collagenase, analytical reference standards & solutions, karl fischer reagents, electrophoresis consumables & instruments, fine organic & inorganic chemicals and biochemicals. We offer deuterated pesticides & carbon 13 labeled pesticides, optically active enantiomers of pesticides, toxaphene congeners, hplc post column derivatization instruments, columns, methods and reagents, gmp grade collagenase, sterile grade collagenase, crude collagenase, neutral protease, pesticides, herbicides and metabolites.