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Sodium sulfite

Description References

CAS No. 7757-83-7
Chemical Name: Sodium sulfite
Synonyms: s-wat;sulftech;SULPHITES;natriumsulfit;natriumsulfid;natriisulphis;Natriumsulfit8;Sodium sulfite;SODIUM SULPHITE;disodiumsulfite
CBNumber: CB4111698
Molecular Formula: Na2O3S
Formula Weight: 126.04
MOL File: 7757-83-7.mol
Sodium sulfite Property
Melting point : 500 °C
density : 2.63
refractive index : 1,484
storage temp. : Store at RT.
solubility : H2O: 1 M at 20 °C, clear, colorless
PH: 9.0-10.5 (25℃, 1M in H2O)
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
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
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
TSCA : Yes
HS Code : 28321000
Hazardous Substances Data: 7757-83-7(Hazardous Substances Data)
Symbol(GHS):
Signal word:
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H303 May be harmfulif swallowed Acute toxicity,oral Category 5 P312
Precautionary statements:

Sodium sulfite Chemical Properties,Usage,Production

Description
As a soluble sodium salt of sulfurous acid, Sodium sulfite (Na2SO3) shows blenching, de-sulfurizing and dechlorinating properties which is widely applied in various fields. It is primarily used in the pulp and papermaking industry due to its blenching activity. It can serve as a good additive to help preserve the fresh appearance of good products. Besides, sodium sulfite is a component in many pharmaceuticals, which is effective to maintain the potency and stability of drugs. It can also be applied for water treatment as an oxygen scavenger agent and applied in flue gas desulfurization and preservation of photo developer solutions, etc.
References
https://en.wikipedia.org/wiki/Sodium_sulfite
https://pubchem.ncbi.nlm.nih.gov/compound/24437#section=Top
http://www.calabriancorp.com/product/sodium-sulfite-anhydrous
http://www.livestrong.com/article/108427-list-foods-sulfite-allergies/
Chemical Properties
white crystals or powder
Definition
ChEBI: An inorganic sodium salt having sulfite as the counterion.
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.
Sodium sulfite Preparation Products And Raw materials
Raw materials
Sulfur SODIUM SULPHIDE HYDRATE Sodium dithionite Sodium sulfide Sulfur dioxide Phenol SODIUM SULFITE HEPTAHYDRATE Benzene Sulphur Sodium hydroxide Sulfuric acid Sodium carbonate
Preparation Products
HEPTALDEHYDE SODIUM BISULFITE Zonisamide 2-(2-FLUORO-PHENYL)-ETHANESULFONYL CHLORIDE Sodium decane-1-sulfonate 1-TRIDECANESULFONIC ACID SODIUM SALT acramoll W paste 1-TETRADECANESULFONIC ACID SODIUM SALT 1,4-Butane sultone Sodium pentanesulfonate M-TOLYL-METHANESULFONYL CHLORIDE friction reducer SAF 2-Trifluoromethylbenzylsulfonyl chloride Emulsifier OS 2-BROMORESORCINOL O-TOLYL-METHANESULFONYL CHLORIDE 3-Cyanophenylhydrazine hydrochloride R-(-)-Apomorphine 6-FLUORO-2-NAPHTHOIC ACID Sodium 1-butanesulfonate 2-(4-FLUORO-PHENYL)-ETHANESULFONYL CHLORIDE Sodium 1-octanesulfonate Sodium 2-bromoethanesulphonate 1-Methyl-4-(methylsulfonyl)-benzene Sodium 1-hexanesulfonate 1,8-DINITROANTHRAQUINONE 2-Bromo-6-fluoronaphthalene 3,3-Dimethylglutaric acid 4-Iodoanisole 1-BUTANESULFONIC ACID SODIUM SALT MONOHYDRATE 1-HEPTANESULFONIC ACID SODIUM SALT MONOHYDRATE 1-NONANESULFONIC ACID SODIUM SALT (2-FLUORO-PHENYL)-METHANESULFONYL CHLORIDE 2-NITRO-ALPHA-TOLUENESULFONYL CHLORIDE Sodium 2-methylprop-2-ene-1-sulfonate 1-HEXADECANESULFONIC ACID SODIUM SALT Sodium 1-heptanesulfonate 4-TRIFLUOROMETHYLBENZYLSULFONYL CHLORIDE (3-TRIFLUOROMETHOXY-PHENYL)-HYDRAZINE HYDROCHLORIDE N-(4-iodobenzoyl)-L-glutamic acid 2-Amino-6-bromonaphthalene
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BioChemika Ultra BioChemical Analytical Chromatography Product Catalog Analytical Reagents Biochemicals and Reagents 7757-83-7 Sodium sulfite anhydrous SODIUM SULFITE, EXSICCATED SODIUM SULPHITE Puriss p.a. ACS Inorganic Salts Synthetic Reagents Denaturation General Use anhydroussodiumsulfite disodiumsulfite exsiccatedsodiumsulfite natriisulphis natriumsulfid natriumsulfit natriumsulfurosum sodiumsulfite(2:1) sodiumsulfite[na2so3] sulfitedesodium sulftech Sulfurousacid,disodiumsalt sulfurousacid,sodiumsalt(1:2) s-wat SODIUM SULPHITE ANHYDROUS SODIUM SULPHITE 60-70% MIN SODIUM SULPHITE ANHYDROU SODIUM SULFITE ANHYDROUS, R. G., REAG. P H. EUR. SODIUM SULFITE, REAGENTPLUS, 99.99% SODIUM SULFITE ANHYDROUS ACS REAGENT SODIUM SULFITE PURE SODIUM SULFITE REAGENT GRADE 98% SODIUM TARTRATE DIHYDRATE ACS REAGENT SODIUM SULFITE EXTRA PURE, DAB, PH. EUR., B. P., PH. FRA SODIUM SULFITE ANHYDROUS, ACS SODIUM SULFITE PHOTOGRAPHIC GRADE SODIUM SULFITE ANHYDROUS SIGMAULTRA SODIUM SULFITE ANHYDROUS, FOR PHOTO-GRAP HIC PURPOSES SODIUM SULFITE 98+% A.C.S. REAGENT SodiumSulfite93%Min,Cas SodiumSulphiteFcc SodiumSulphiteGr(Anhydrous) SodiumSulphiteAnhydrousA.R. SodiumSulphiteAnhydrousExtraPure Sodium sulfite anhydrous, 98+% Sodiumsulphite,98% Sodium sulfite, anhydrous, extra pure, 97% Sodium sulfite, anhydrous, for analysis ACS, 98+% Sodium sulfite, anhydrous, for analysis, 98.5% SODIUM SULFITE REAGENT (ACS) Na2SO3 Sodiumsulfite,anhydrous,98+%(ACS) sodium sulfite, acs SODIUMSULFITE,ANHYDROUS,FCC(BULK
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