SODIUM SULFITE(cas no.7757-83-7) hair dye intermediate ,96% purity, ... Chemicals;Analytical Reagents for General Use;Puriss p.a.;Q-S, Puriss p.a.;Disulfide Bridge Cleavage Reagents;AlphabeticalBiochemicals and ... if heated to decomposition [Lewis, 3rd ed., 1993, p. 1174].Health HazardWhen ingested, solutions cause gastric irritation by ... -grey powder hair color/dye SODIUM SULFITE(cas no.7757-83-7)