Home Categories Inorganic chemistry Sodium sulfite
A7317412

Sodium sulfite , AR,98.0% , 7757-83-7

Synonym(s):
E221

CAS NO.:7757-83-7

Empirical Formula: Na2O3S

Molecular Weight: 126.04

MDL number: MFCD00003503

EINECS: 231-821-4

Pack Size Price Stock Quantity
500G RMB33.60 In Stock
2.5KG RMB126.40 In Stock
20×500g RMB687.20 In Stock
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Update time: 2022-07-08

PRODUCT Properties

Melting point: 500 °C
Density  2.63
refractive index  1,484
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
PH 9.0-10.5 (25℃, 1M in H2O)
Odor Odorless
PH Range 9.0 - 10.5 at 126 g/l at 25 °C
Water Solubility  23 g/100 mL (20 ºC)
Sensitive  Hygroscopic
Merck  14,8682
Stability: Stable. Incompatible with strong acids. Moisture and air sensitive.

Description and Uses

These white crystals were prepared by passing sulfurous gas over moist sodium carbonate. Sodium sulfite is soluble in water but less so in alcohol. It was used as a preservative for alkaline developers and as a hypo clearing agent in photographic printing.

Safety

Symbol(GHS) 
GHS07
Hazard statements  H315-H319-H335
Precautionary statements  P233-P260-P261-P264-P271-P280-P302+P352-P304-P304+P340-P305+P351+P338-P312-P321-P332+P313-P337+P313-P340-P362-P403-P403+P233-P405-P501
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
3-10
TSCA  Yes
HS Code  28321000
Toxicity LD50 i.v. in mice: 175 mg/kg, Hoppe, Goble, J. Pharmacol. Exp. Ther. 101, 101 (1951)

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