Product Name: Sodium Metabisulphite

Characterisics: White to slightly yellowish crystalline powder or crystal with odor of sulfur dioxide, easily soluble in water. Decomposed in humid, oxygenized into sodium sulfate by exposed in air, sulpher dioxide will be released when it contacts with strong acid and then created the relative salt.

Molecular Formula: Na2S2O5

Molecular Weight: 190.10

Specification:

ITEM	INDEX
Purity, %≥	98.0
SO2, %≥	65.0
Na2S2O4, %≤	2.0
Water Insoluble , %≤	0.05
Heavy Metal (Pb), %≤	0.001
Arsenic (As), %≤	0.0001
Fe, %≤	0.002
PH value	4.5 - 5.5

Usage: It is mainly used as bleaching agent for processing leathers, fabric and organic matter, medium colouring agent for printing and dyeing; germicide and antiseptic for food preserving, brewing and beverage. It is also used as auxiliary material for synthetic dyes, perfume and photographic fixing agent, etc.

Packing: 25kgs plastic woven bags lined with polythene bags.