Chemical Name : Sodium Formaldehyde Sulfoxylate Commercial Name : Rongalite Molecular Formula : NaHSO2• CH2O• 2H2O Molecular Weight : 154.12 Specific Gravity : 1.8 Melting Point : 64 Heat of Fusion : 54.84 KJ/ mol( 13.2Kcal/ mol) Hygroscopic Point : Relative Humidity 60% Stable Pour-Point : 50 max 4. Purpose: It is mainly used as a discharging agent, color-discharging agent, reductant in printing and dyeing industry, as an activating agent for production styrene-butadise rubber and synthetic resin, also be used to decolourize and bleach some organic matters, for example: as a bleaching agent in synthetic rubber, sugar-making, and food industries. It may be substituted for the sodium hydrosulfite in some special conditions.