Sodium Formaldehyde Sulfoxylate --Pharmaceutical grade
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Test |
Result |
Specifications |
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Description |
Complies |
White crystals or hard,white masses,having the characteristic odor of garlic. |
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Solubility |
Complies |
Freely soluble in water,slightly soluble in alcohol, in ether,in chloroform,and in benzene. |
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Identification |
Complies |
Metallic silver is produced,either as a finely divided,gray precipiate or as a bright metallic mirror on the inner surface of the tube with add silver-ammonia-nitrate TS. |
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A. |
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B. |
Complies |
A permanent,deep red color appears when warm with sulfuric acid. |
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Assay |
49.69% |
NLT45.5% and NMT 54.5% of SO2,calculated on the dried basis. |
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Sulfied |
Complies |
No discoloration is evident within 5 min. |
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Iron |
Complies |
The color of the Sample is not deeper than that of the standard solution. |
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Sodium Sulfite |
1.61% |
NMT 5%on the dried basis. |
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PH（20mg/ml） |
9.95 |
9.5-10.5. |
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Loss On Drying |
15.60% |
NMT 27%. |
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Alkalinity |
0.9ml |
NMT 3.5ml of 0.1M sulfuric acid is required for neutralization. |
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Clarity and Color of solution |
Complies |
The Sample solution and the water are equally clear and,when viewed transversely by transmitted light, exhibit no apparent difference in color. |
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Sodium Formaldehyde Sulfoxylate Packing:
Packed in HDPE/fiber drum,inner double lined with LLDPE bags,50gauge.
Sodium Formaldehyde Sulfoxylate Storage:
Preserve in well-closed,light-resistant containers,and store at controlled room temperature.
