Цена метабисульфит натрия 7681 57 4 пиросульфит

sodium pyrosulfite na2s2o5

CAS no. : 7681-57-4
EINECS no. : 231-673-0
Molecular formula: Na2S2O5
Molecular weight: 190.1065

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. It is Na2S2O6, so the product cannot be stored for a long time. Above 150 degrees Celsius, SO2 is decomposed.

Usage:

1. Chemical industry

Used in the production of insurance powder, sulfamethazine, a caprolactam, etc., as well as the purification of chloroform, phenylpropane sulfone and benzaldehyde. The photographic industry is used as an ingredient in fixers. 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.
2. 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.
3. 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.

Packaging: Packed in 25kg paper package or plastic woven bag, 50kg/1000kg/1100kg jumbo bag or as per the buyer's requirement.

Storage:In dry and cool warehouse with package sealed and away from rain and water.

Delivery: about 10 days after receipt the advance payment.

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