Carbohydrazide, 4-Hydroxy Tempo manufacturer / supplier in China, offering 2, 6-Pyridyldicarbinol CAS 1195-59-1 2, 6-Pyridinedimethanol, Guanidine Hydrochloride CAS 50-01-1 Guanidine Hydrochloride, Fluorene-9-Bisphenol 9, 9-Bis (4-hydroxyphenyl) Fluorene CAS 3236-71-3 4, 4′- (9-Fluorenylidene) Diphenol and so on.