Anhydrous Sodium Sulfite CAS#7757-83-7

High Water Solubility – Sodium sulfite anhydrous dissolves readily in water, with solubility increasing significantly as temperature rises.
Alkaline Solution – Its aqueous solution exhibits alkaline properties, useful in various chemical processes.
High Thermal Stability – Possesses a relatively high melting point and is not prone to spontaneous combustion.
Chemical Resistance – Insoluble in ethanol and nearly insoluble in ether, ensuring stability in different environments.

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Product Details

Anhydrous Sodium Sulfite CAS#7757-83-7

Anhydrous sodium sulfite is a widely used inorganic chemical with high water solubility. Its aqueous solution is alkaline, and solubility increases with temperature—for example, 12.54 g/100 ml at 0 °C and 283 g/100 ml at 80 °C. It is insoluble in ethanol and nearly insoluble in ether. The compound has a relatively high melting point and is not prone to spontaneous combustion.

Anhydrous Sodium Sulfite CAS#7757-83-7

Sodium sulfite Chemical Properties

Melting point	500 °C
density	2.63
bulk density	1480kg/m3
refractive index	1484
storage temp.	Store at +5°C to +30°C.
solubility	H2O: 1 M at 20 °C, clear, colorless
form	Solid
Specific Gravity	2.633
color	White to slightly yellow
Odor	Odorless
PH Range	9.0 - 10.5 at 126 g/l at 25 °C
PH	9.0-10.5 (25℃, 1M in H2O)
Water Solubility	23 g/100 mL (20 ºC)
Sensitive	Hygroscopic
Merck	148682
Stability:	Stable. Incompatible with strong acids. Moisture and air sensitive.
CAS DataBase Reference	7757-83-7(CAS DataBase Reference)
NIST Chemistry Reference	sodium sulfite(7757-83-7)
EPA Substance Registry System	Sodium sulfite (7757-83-7)
Absorption	cut-off at 265nm in H2O at 1M
Hazard Codes	Xn
Risk Statements	31-36/37/38-22-40-36/38
Safety Statements	24/25-36-26-22
WGK Germany	1
RTECS	WE2150000
F	46091
TSCA	Yes
HS Code	28321000
Hazardous Substances Data	7757-83-7(Hazardous Substances Data)
Toxicity	LD50 i.v. in mice: 175 mg/kg, Hoppe, Goble, J. Pharmacol. Exp. Ther. 101, 101 (1951)

Anhydrous Sodium Sulfite CAS#7757-83-7

Product Usage

Anhydrous sodium sulfite, an inorganic compound with strong reducing properties, has diverse applications. Industrial-grade material is used for decolorization and filtration in dyeing and printing. Food-grade material serves as a compliant additive for preserving fruits, vegetables, and seafood. Photographic-grade material is employed in the development process of the photosensitive industry, while pharmaceutical-grade material acts as an intermediate in the production of chloroform, benzaldehyde, and other drugs. It is also widely utilized in papermaking, electronics, and other industrial fields.

Anhydrous Sodium Sulfite CAS#7757-83-7