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High quality best price 638-23-3 with reasonable price and fast delivery !!
1-9 Kilogram
$15.50
≥ 10 Kilogram
$15.40
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Est. 7 days production
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: European Pharmacopoeia 7TH | |
Description | A white, crystalline powder, practically insoluble in water, in alcohol and in ether. It dissolves in dilute mineral acids and in dilute solutions of alkali hydroxides. | |
Identification | Test A (Specific Optical rotation) | It complies with the test for specific optical rotation. |
Test B(IR) | The IR spectrum of the sample is concordant with the spectrum of the reference standard, Carbocisteine CRS. | |
Test C(TLC) | 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) | |
Test D(Chemical reaction) | . Dark red color is produced, which changes to brown and then to yellow within a few minutes. | |
pH | 2.8 ~3.0 | |
specific rotation [α]D 20 | -32.5° ~ -35.5° | |
State of solution (Transmittance) | Solution S is clear and colourless Not less than 95.0% | |
Ninhydrin-positive substances | Not more than 0.5% | |
Chloride(Cl) | Not more than 0.15% | |
Sulfate(SO4) | Not more than 0.03% | |
Heavy metals(Pb) | Not more than 0.001% | |
Loss on Drying | Not more than 0.5% | |
Residue on ignition(sulfated) | Not more than 0.3% | |
Assay | 98.5% ~ 101.0 % | |
Hair finishing agent and adjusting agent, it can resist acne.
It can be used in the curing of chronic tracheitis, emphysema, pulmonary.
Qingdao Sigma Chemical Co.,Ltd is a global chemical industry manufacturers and suppliers of pharmaceuticals
and intermediates, food and feed additives, herbal extracts, agrochemicals and fine chemicals etc.
The aim of Qingdao Sigma Chemical Co.,Ltd is a quality policy that "Elements in the system
all have been satisfied, Personnel has been trained; Every batch of material is checked, Each procedure guarantees the quality; Every bag of our products is top grade, Service is thoughtful all the time, quality and reputation to increase market share and promote enterprise development. The quality, colors and forms of our products have reached a high level in related chemical industry, which relies on characteristic and advanced processing technology and it has gained a high and reliable reputation from customers at both quality and services.
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