CAS NO. : 7783-18-8 Molecular FORMULA : (NH4)2S2O3 Molecular Weight : 148.20
MELTING POINT : 150 C SPECIFIC GRAVITY : 1.679 APPEARANCE : clear solution
(NH4)2S2O3 : 58.0 - 61.0% SPECIFIC GRAVITY : 1.31 - 1.34 NH4OH : 1.5% max ((NH4)2SO3 : 1.0% max Fe : 10ppm mx HEAVY METALS :10ppm max RESIDUE ON IGNITION : 0.1% max