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Sodium metabisulfite USP-NF/Ph.Eur 25KG
91630SK025351217130FU
USP/Ph.Eur3512171
7681-57-476046
Na2S2O5June 2021
190.1May 2024
Sr.No.TestResultSpecification
1AppearanceWhite crystalline powder.White or almost white to yellowish crystalline powder or colorless crystals..
2SolubilityPassesFreely soluble in water. Slightly soluble in ethanol (96%).
3Identification A (By pH)3.93.5 to 5.0
4Identification (Reaction of sulfates)CompliesWhite precipitate should form.
5Identification (Reaction of sodium)CompliesA dense white precipitate should form.
6Identification (Sulfite)CompliesA filter paper moistened with mercurous nitrate solution should blacken.
7Appearance of solutionPassesClear and colorless solution.
8pH3.93.5 to 5.0
9ThiosulfatesPassesThe solution should remain clear for at least 15 min.
10Limit of ThiosulfateLess than 0.05%0.05% max.
11Arsenic (As)Less than 5ppm5ppm max.
12Iron (Fe)Less than 20ppm20ppm max (0.002%).
13Limit of ChlorideLess than 0.05%0.05% max.
14Assay (as SO2)65.8%65.0%- 67.4%.
15Assay97.6%95.0% - 100.5%.
Remarks: THE CAPTIONED MATERIAL COMPLIES WITH THE PRESCRIBED QUALITY OF USP-NF AND PH.EUR SPECIFICATION.
FINAR provides this analytical report in good faith and to the best of its knowledge. It should not be substituted for the users own raw material quality control.
Tested By
(Chemist - Quality Control)
Approved By
(Head - Quality Control)
Computer Generated Report - Does not require Signature.
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