Sodium sulphite 95.0-100.5% (by iodometry), EMPROVE® ESSENTIAL Ph. Eur., BP, NF, E221, SAFC®

Supplier: MERCK PRODUCTION CHEMICALS

1.06652.1000 1.06652.9029
1.06652.1000EA 119 GBP
1.06652.1000 1.06652.9029
Sodium sulphite 95.0-100.5% (by iodometry), EMPROVE® ESSENTIAL Ph. Eur., BP, NF, E221, SAFC®
Sodium sulphite

Elemental impurity specifications have been set considering ICH Q3D (Guideline for Elemental Impurities). Class 1 to 3 elements are not likely to be present above the ICH Q3D option 1 limit, unless specified and indicated.


Conforms to the purity criteria on food additives according to the current European Commission Regulation.

Formula: Na₂SO₃
Melting Pt: > 500 °C (dec.)
Density: 2,63 g/cm³ (20 °C)
Storage Temperature: Ambient
MDL Number: MFCD00003503
CAS Number: 7757-83-7
EINECS: 231-821-4
REACH: 01-2119537420-49
Merck Index: 13,08757

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Specification Test Results

Assay (Iodometric) 95.0 - 100.5%
Assay (SO₂) ≥48.0%
Identity Passes Test
Appearance of Solution Passes Test
Thiosulfate (S₂O₃) ≤0.05%
Heavy Metals (as Pb) ≤0.0005%
As (Arsenic) ≤0.0002%
Hg (Mercury) ≤0.0001%
Fe (Iron) ≤0.0005%
Pb (Lead) ≤0.0002%
Se (Selenium) ≤0.00025%
Zn (Zinc) ≤0.0025%
Residual solvents (Ph. Eur./USP/ICH) Excluded by the Manufacturing Process
Conforms to Ph Eur, BP, NF, E221

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