Sodium metabisulfite
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Post Date:
Jan 22,2025
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Expiry Date:
Jul 21,2025
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Detailed Description:
Cas No. :7681-57-4
Molecular Formula:Na2S2O5
Molecule Weight:190.10
Appearance:White or light yellow crystalline powder
Quality standard:GB1983——1998
Company standard
Item Index
Content (as Na2S2O5) ≥ 97.5
Iron(as Fe) % ≤ 0.001
Clarify degree clearly
Heavy metals(as Pb) % ≤0.0005
Arsenic(as As) % ≤ 0.0001
Chinese Standard
Item Country index
Content (as Na2S2O5) ≥ 95.0
Iron(as Fe) % ≤ 0.003
Clarify degree A little turbid
Heavy metals(as Pb) % ≤0.0005
Arsenic(as As) % ≤ 0.0001
Main uses:
Bleach agent (e.g.candies, cake, bamboo shoots, etc);
Loose agent (e.g.bread, cracker etc);
Antiseptic and germicide (e.g.fruit juice, tinned food ，brews, the cereals food is defended storage etc);
Inhibitor and freshen agent (e.g.day lily, seafood, fruit and vegetable etc)
Quality standard:HG/T2826——1997
Company Standard
Item
Value
Content(as Na2S2O5 ) %
≥ 97.0
Fe % (as Fe) %
≤ 0.0015
water-Insoluble %
≤ 0.01
Arsenic(as As) %
≤ 0.0001
Chinese standard
Item
Value
Top-grade
First grade
Qualified product
Content(asNa2S2O5 ) %
≥ 96.0
≥ 94.0
≥ 92.5
Fe %(as Fe)
≤ 0.005
≤ 0.010
≤ 0.015
water-Insoluble %
≤ 0.05
≤ 0.05
≤ 0.10
Arsenic(as As) %
≤ 0.0001
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Main uses:
Mordant of printing and dyeing;
Dechlorinate of textile after bleaching;
Sulphonated agent and reducer of chemical industry and pharmacy;
Bleach of paper pulp, bamboo and timber bleach of stapk; Treatment agent of waste water;
Rubber solidifying agent
Perfume industry is served as hydrocarbon perfume aldehyde
The hide profession employ to do to molt dose and pliable dose and wearproof dose ，
The sensitize industry is served as the developing agent reductant and the protection of fixing bath dose and so on; sewage treatment.
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CAS Registry Number:
7681-57-4
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Synonyms:
;Sodium pyrosulfite;disodium disulphite;Sodium metabisulphite;Sodium disulphite;Sodium pyrosulphite;SODIUM DISULFITE;disodium oxidosulfanesulfonate oxide;Sodium Metabi;Metabisulfite Sodium;Sodium Metabisulfite (Food Grade);
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Molecular Formula:
Na2S2O5
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Molecular Weight:
190.1065
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Molecular Structure:
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Hazard Symbols:
Xn:Harmful;
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Risk Codes:
R22:;
R31:;
R41:;
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Safety Description:
S26:;
S39:;
S46:;
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