Place of Origin:Hubei,China(Mainland) Brand Name:Sensedawn CAS NO.:7757-83-7 Purity:97%
Application: It is used in dyeing industry as deoxidizer and bleaching agent for a variety of cotton fabric treating and scouring, which can prevent fabrics from local oxidation and deterioration of fibre strength. In photographic industry it is used as a reagent. Inorganic industry it is used as reducing agent in production of m-phenylenediamine, 25 - bared oxazolone, amino salicylic acid, etc. Textile industry uses it as a stabilizer for synthetic fibre. Other applications include various uses in paper mills, electronic industry, water treatment, etc.
Sodium sulfite Chemical Properties
mp
500 °C
density
2.63
refractive index
1,484
storage temp.
Store at RT.
solubility
H2O: 1 M at 20 °C, clear, colorless
Water Solubility
23 g/100 mL (20 ºC)
Sensitive
Hygroscopic
Merck
14,8682
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)
Safety Information
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
3-10
HS Code
28321000
Hazardous Substances Data
7757-83-7(Hazardous Substances Data)
Sodium sulfite Usage And Synthesis
Chemical Properties
white crystals or powder
General Description
White odorless powder. Density 2.633 g / cm3. Moderately toxic. Sinks in water and dissolves slowly. Also transported as a heptahydrate Na2SO3.7H2O.
Air & Water Reactions
Soluble in water. Reacts with hot water, steam or acids to produce corrosive material.
Reactivity Profile
Sodium sulfite is a reducing agent, particularly under basic conditions. Reacts with oxidizing agents such as peroxides, epoxides, oxoacids. Emits toxic fumes of sodium oxide and oxides of sulfur if heated to decomposition [Lewis, 3rd ed., 1993, p. 1174].
Health Hazard
When ingested, solutions cause gastric irritation by the liberation of sulfurous acid. Because of rapid oxidation to sulfate, sulfites are well tolerated until large doses are reached; then violent colic and diarrhea, circulatory disturbances, central nervous depression, and death can occur.
Fire Hazard
Literature sources indicate that Sodium sulfite is noncombustible.
Good quality: purity reach 97%
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