SMBS

SMBS sodium metabisulphite we are manufacturer Na2S2O5 CAS NO: 7681-57-4 white or light yellow crystalline powder

SMBS

sodium metabisulphite 

tech grade 97% is white crystal

Molecular formula  Na2S2O5

Molecular weight  190.10

CAS NUMBER 7681-57-4

Appearance  white or light yellow crystalline powder , relative density is 1.4 .

Uses: It can be used as the material of medicine, or used as curing agent of rubber; It also

can be used as dechlorinating agent and scouring agent of textile; It also can be used in the

process of leather Moreover, it can be used as the material of fine chemicals, or used as

developer; In food industry, It can be used as bleaching agent, loosening agent, antisepsis

bactericide and antioxygen antistaling agent.

ITEM	SPECIFICATION	TEST RESULT
PURITY(AS Na2S2O5 ):	97.0%MIN	97.3%
SULFUR DIOXIDE(SO2):	65.0%MIN	65.50%
ARSENIC(As) :	0.0002%MAX	0.00008%
SELENIUM(Se) :	0.0005%MAX	0.00007%
HEAVY METALS(As Pb):	0.0005%MAX	0.0003%
WATER INSOLUBLE:	0.02%MAX	0.01%
IRON(Fe):	0.002%MAX	0.0012%
PH VALUE:	4.0-4.8	4.4

Packing External packing is PP woven bag, Internal packing is PE bag, the thickness ≥0.05mm.

Storage & defence: Stored in cool and dry place, avoid moisture and heat. No breakage, No

mixed with oxidant and toxic matter. The storage period is 6 month since the production date. It

should be transported by clean car, with covering matter, avoid raining.

Netwt.  25kg, 50kg, 1000kg/bag.

SMBS