ผงแป้ง: | ใช่ |
---|---|
ปรับแต่ง: | ปรับแต่ง |
การรับรอง: | GMP, HSE, ISO 9001, USP, BP |
เหมาะสำหรับ: | ผู้สูงอายุ, เด็ก, ผู้ใหญ่ |
รัฐ / จังหวัด: | Powder |
เพียวริตี: | 99 % |
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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 |
Test Item |
Specification |
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. |
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 |
pH |
2.8~3.0 |
Specific optical rotation[α]D20 |
-32.5° to -35.5°(on dried basis) |
State of solution (Transmittance) |
Solution S is clear and colourless Not less than 96.0% |
Nihydrin-positive substances |
Not more than 0.5% |
Chloride(Cl) |
Not more than 0.15% |
Sulfate(SO4) |
Not more than 0.030% |
Heavy metals(Pb) |
Not more than 0.001% |
Loss on Drying |
Not more than 0.5% |
Sulfated ash |
Not more than 0.30% |
Assay |
98.5% ~ 101.0% |
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