CAS No.: | 7681-57-4 |
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Formula: | Na2s2o5 |
EINECS: | 231-673-0 |
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ITEM | STANDARD | TEST RESULT |
Appearance | White to slightly yellowish crystialline powder | |
Sodium Metabisulphite (Na2S2O5) % ≥ | 97 | 98.10 |
SO2, % ≥ | 65.0 | 66.56 |
Fe , % ≤ | 0.002 | 0.0014 |
AS, % ≤ | 0.0001 | 0.00009 |
PB, % ≤ | 0.0005 | 0.00048 |
Insoluble matter in water, % ≤ | 0.02 | 0.01 |
PH | 4.4-4.8 | 4.45 |