sodium metabisulfite food grade anti-corrosion electroplating water treatment cas7681-57-4 sodium metabisulfite can be exported

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Sodium Metabisulfite

Molecular formula: Sodium sulfide₂O₅

Alias: Sodium Metabisulfite, Potassium Metabisulfite, Sodium Metabisulfite

English Name: Sodium Pyrosulfite

Appearance:White or yellow crystalline powder or small crystals.

CAS NO：7681-57-4

EINECS登录号：231-673-0

HS CODE:2,832,100,000

Characteristics:

With a strong SO₂Smells, dissolves in water, and the water solution is acidic.

Test Report:

Detection items	Detection standards	Detection results
Purity (As Na₂S₂O₅）"≥" is the symbol for "greater than or equal to" in English.%	97	97.5
Sulfur dioxide (SO2)₂）≤	65	64.8
Arsenic (As)≤	0.0002 percent	0.0001 percent
Heavy metals (lead-based)	Less than 0.0005 percent	0.0004 percent
insoluble in water≤	0.02	0.01

Function:

1. Used as a component of the fixative in the photography industry.

2. Used in electroplating, dyeing, leather making.

3. As a preservative, bleaching agent, and leavening agent in food processing.

Packing:25kg/pack, plastic woven bag packaging.

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Update time：20250711112313

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