... sample 4.Basic chemical raw material 1. 91-20-3 96% industrial naphthalene,technical naphthalene,Crude naphthalene,tar camphor 1)CAS ... . Ada ada#bailichem.cn 0086-15081709808skype:hbadachem 91-20-3 96% industrial naphthalene,technical naphthalene,crude naphthnalene,tar camphor