OBSH 4,4'-oxydibenzenesulfonyl hydrazide CAS NO.: 80-51-3 Appearance:White fine powder Moisture:0.5% max OBSH4,4'-oxydibenzenesulfonyl hydrazideCAS NO.: 80-51-3Specification:Appearance:White fine powderMoisture:0.5% maxDec.temp.(5°C/min in air):150-160°CGas Volume in air:125±5ml/GrDG CLASS:4.1UN NO:2591PG:II25kg net carton 4,4'-oxydibenzenesulfonyl hydrazide(OBSH)