| Customization: | Available |
|---|---|
| Powder: | Yes |
| Customized: | Customized |
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| Product Name | S-carboxymethyl-L-cysteine |
| CAS number | 638-23-3 |
| Molecular formula | C5H9NO4S |
| Molecular weight | 179.19 |
| Appearance | White to slightly off-white amorphous powder |
| Melting point | 205-207ºC |
| Flash point | 191.8ºC |
| Relative density | 1.451g/cm3 |
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Test Item |
Specification |
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Description |
A white or almost white, crystalline powder, particularly insoluble in water and in alcohol. It dissolves in dilute mineral acids and in dilute solutions of alkali hydroxxides. |
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Identification |
A. It complies with the test for specific optical rotation |
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B. The IR spectrum of the sample is concordant with the spectrum of the reference standard, Carbocisteine CRS |
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C. The principal spot in the chromatogram obtained with the test solution(b) is similar in position,color and size to the principal spot in the chromatogram obtained with the reference solution(a) |
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D. Dark red color is produced, which changes to brown and then to yellow within a few minutes |
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pH |
2.8~3.0 |
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Specific optical rotation[α]D20 |
-32.5° to -35.5°(on dried basis) |
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State of solution (Transmittance) |
Solution S is clear and colourless Not less than 96.0% |
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Nihydrin-positive substances |
Not more than 0.5% |
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Chloride(Cl) |
Not more than 0.15% |
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Sulfate(SO4) |
Not more than 0.030% |
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Heavy metals(Pb) |
Not more than 0.001% |
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Loss on Drying |
Not more than 0.5% |
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Sulfated ash |
Not more than 0.30% |
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Assay |
98.5% ~ 101.0% |
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