Anhydrous sodium sulfite

[English Name]: Anhydrous Sodium Sulfite

【 Molecular formula 】: Na2SO3

Solubility: easily soluble in water

【 Main Physical and Chemical Properties 】:

White powder; Its aqueous solution is alkaline, with a pH value of about 9-9.5. At 33.4 ℃, its highest solubility is about 28%. It is oxidized into sodium sulfate when in contact with air, and decomposes into sodium sulfide when exposed to high temperature. Its density is 2.633 (15.4 ℃), and its refractive index is 1.565; Molecular weight 126.04.

[CAS Number]: 7757-83-7

[Executive Standard]: HG/T2967-2010