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Sodium Metabisulfite CAS#7681-57-4

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Chemical Name：Sodium Metabisulfite

CAS No.:7681-57-4

Molecular Formula：H2O5S2.2Na

Sample: Available

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Product Details

Sodium Metabisulfite CAS#7681-57-4

Sodium metabisulfite is a widely used inorganic compound, usually in the form of white or slightly yellowish crystalline powder or small crystals, with a strong smell of sulfur dioxide. It has a density of 1.48g/cm³, is highly soluble in water, and its aqueous solution is acidic. At 20℃, its solubility in water is 54g/100ml, and at 100℃, it is 81.7g/100ml.

Sodium Metabisulfite CAS#7681-57-4

Sodium metabisulfite Chemical Properties

Melting point	>300 °C (lit.)
density	1.48
bulk density	1000-1200kg/m3
refractive index	1.474
storage temp.	Store at +5°C to +30°C.
solubility	540 g/L (20°C)
form	Powder/Solid
Specific Gravity	1.48
color	White to slightly yellow
PH	3.5-5 (50g/l, H2O, 20℃)
Odor	Sulphorous
PH Range	4.5 at 50 g/l at 20 °C
Water Solubility	540 g/L (20 ºC)
Sensitive	Air & Moisture Sensitive
Merck	14,8638
Exposure limits	ACGIH: TWA 5 mg/m3 NIOSH: TWA 5 mg/m3
Stability:	Stable. Incompatible with strong oxidizing agents, strong acids. Contact with strong acids releases a poisonous gas. May be moisture and air sensitive.
InChIKey	HRZFUMHJMZEROT-UHFFFAOYSA-L
CAS DataBase Reference	7681-57-4(CAS DataBase Reference)
EPA Substance Registry System	Sodium metabisulfite (7681-57-4)

Safety Information

Hazard Codes	Xn,Xi
Risk Statements	22-31-41-36/37/38-52
Safety Statements	26-39-46-36-16
RIDADR	3260
OEB	B
OEL	TWA: 5 mg/m3
WGK Germany	1
RTECS	UX8225000
TSCA	Yes
HS Code	2832 10 00
PackingGroup	III
Hazardous Substances Data	7681-57-4(Hazardous Substances Data)
Toxicity	LD50 orally in Rabbit: 1540 mg/kg LD50 dermal Rat > 2000 mg/kg

Product Usage

Sodium metabisulfite, as an inorganic compound with strong reducing properties, can be used as a food antioxidant, preservative and bleaching agent in food grade, and in industrial grade in the synthesis of chemical products, paper bleaching, rubber solidification, etc. In the medical field, it can also be used as a raw material for the production of chloroform, benzaldehyde and other drugs.

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