Sodium metabisulfite

Sodium Metabisulfite

Sodium metabisulfite is a white or yellow crystalline powder or small crystal with a strong SO2 odor, a specific gravity of 1.4, soluble in water, and the aqueous solution is acidic. When it is in contact with a strong acid, it releases SO2 to form a corresponding salt. When it is left in the air, it oxidizes into Na2S2O6, so the product cannot be stored for a long time. Above 150 degrees Celsius, SO2 is decomposed.

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Product Name	Sodium metabisulfite
MF	Na₂S₂O₅
EINECS NO.	231-673-0
CAS NO.	7681-57-4
HS Code	2832100000

ITEM	TEST RESULT
Sodium Metabisulphite (Na₂S₂O₅) %	97.18
SO₂ % ≥	65
Fe % ≤	0.002
Clarity	clear
Insoluble matter in nitric acid% ≤	0.009
AS% （mg/kg)	<2
Phosphoric acid test ≤ （mg/kg)	4.2
Appearance	White to slightly yellowish crystialline powder

Usage:
Chemical industry
It is used for the production of insurance powder, sulfamethazine, analgin, caprolactam, etc., as well as the purification of chloroform, phenylpropane sulfone and benzaldehyde. The photographic industry is used as a fixative for the fixer. The perfume industry is used to produce vanillin. Used as a preservative for brewing industry, a rubber coagulant and a bleaching agent for cotton bleaching. Organic intermediates, dyes, and tanning are used as reducing agents for electroplating, wastewater treatment in oil fields, and as a mineralizer for mines.
industry
It is used in printing and dyeing, organic synthesis, printing, tanning, pharmaceutical and other departments; as a preservative, bleaching agent and loosening agent in food processing.
Used as a chemical reagent
(Printing and dyeing, photography, etc.), used as bleach mordant, reducing agent rubber coagulant, also used in organic synthetic pharmaceuticals and spices.

● Packing, Delivery, Shipping and Serving of the Caustic Soda/NaOH.
■ Packing: Caustic soda is packed in plastic woven bags (25Kg/ bag with inner lining). After packaging, it is repacked in full-ton film packing and secondary bagging (plastic woven bag) according to customers' requirements.
■ Delivery: 7-20 days after confirming order, detail delivery date should be decided according to production season and order quantity.
■ Serving: Competitive price; Reply within 24 hours; Stable shipping support; Full after-sale service.

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