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TYPICAL PHYSIOCHEMICAL PROPERTIES OF SODIUM META BI-SULPHITE |
| GRADE |
Technical |
| Property |
Value |
| Physical App. |
White to very faint cream colour crystalline Material |
| Appearance of 20% Aqua Solution |
Slightly Hazy solution free from extreneous impuritics Pale yellow colour |
| PH of 5% Solution |
From 5.0+0.5 at R.T. |
Thisulphate as
Na2 S2 O3 5H2O |
0.5% (max) |
| Heavy Metal as P.B. |
0.05% (max) |
| Iron as Fe |
0.05% (max) |
| Purity as Na2 S2 O5 |
95.0% (mini) |
| Purity as SO2 |
64.0% (mini) |
| Purity as NaHSO 3/2 |
100.00% (mini) |
| Insoluble Matter |
0.05% (max) |
| Chlorides as (CL) |
0.06% |
| Sodium Sulphite |
5.00 (max) |
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| GRADE |
Photo |
| Property |
Value |
| Sodium Metabisulphite wt% |
97 min |
| Sodium Sulphite wt% |
2.0 max |
| Sodium Sulphate wt% |
1 max |
| Sulphur Dioxide wt% |
65.5 min |
| Iron (Fe) PPM |
5 max |
| Heavy Metals (Pb) PPM |
10 max |
| pH of 1% SOLN. |
4-4.4 |
| Arsenic PPM |
2 max |
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