CAS No 638-23-3 S-Carboxymethyl-L-Cysteine, Carbocistein

• Powder: Yes
• Customized: Customized
• Certification: GMP, HSE, ISO 9001, USP, BP
• Suitable for: Elderly, Children, Adult
• State: Powder
• Purity: >99%
• Model NO.: S-Carboxymethyl-L-cysteine
• CAS: 638-23-3
• Mf: C5h9no4s
• MW: 221.252
• Density: 1.451g/cm3
• Boiling Point: 393.5 C at 760 Mmhg
• Melting Point: 208-213 °c (DEC.)
• Flash Point: 191.8 C
• Usage: Animal Pharmaceuticals
• Transport Package: 1kg/Bag, 25kg/Drum
• Specification: Carbocistein
• Trademark: HNB
• Origin: China
• Production Capacity: 2000kg/Month

Product Description

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

Carbocisteine (INN), also called carbocysteine (USAN), is a mucolytic that reduces the viscosity of sputum and so can be used to help relieve the symptoms of chronic obstructive pulmonary disorder (COPD) and bronchiectasis by allowing the sufferer to bring up sputum more easily. Carbocisteine should not be used with antitussives (cough suppressants) or medicines that dry up bronchial secretions.
Carbocisteine is produced by alkylation of cysteine with chloroacetic acid.

It is an important pharmaceutical raw material; used in the synthesis of a variety of drugs, can reduce the stickiness of respiratory secretions, for the treatment of chronic tracheitis, emphysema, tuberculosis and so on.




 

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
	B.  The IR spectrum of the sample is concordant with the spectrum of the reference standard, Carbocisteine CRS
	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)
	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%