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Contact Person Mr. allen
608 Room Chuangxin Bld. No.25 Goxin First Road, Xian
Product Name: S-Carboxymethyl-L-Cysteine, Carbocistein
Molecular Formula: C5H9NO4S
Molecular Weight: **9.***4
CAS No: [********9]
Characteristics: White crystals or crystalline powder. Slighytly
acid tast. Very slightly soluble in water, practically insoluble in
ethanol and in gracial acetic acid and in ether. Dissolves in
dilute hydrochloric acid and in sodium hydroxide T. S.
Quality Standards: EP4, AJI*2, BP*8
| Items | Specification (EP4) | Specification (AJI*2) | Specification (BP*8) |
| Description | White crystals or crystalline powder | ||
| Identification | Infrared absorption spectrum | A; B; C; | |
| Specific rotation [a]D *0 ° |
*3 2 .5 ° - **5.5 ° | **3.5 ° - **6.5 ° | *3 2 .5 ° - *5.5 |
| State of solution (Transmittance) | Clear and colorless | ≥ *8.0% | Clear and colorless |
| Chloride(Cl) | ≤ 0. *5 | ≤ 0.*4% | ≤ 0. *5 |
| Ammonium(NH4) | - - - - | ≤ 0.*2% | - - - - |
| Sulfate(SO4) | ≤ 0. *3 | ≤ 0.0 2 % | ≤ 0. *3 |
| Iron(Fe) | - - - - | ≤ *0PPm | - - - - |
| Heavy metals(Pb) | 0.**1% | ≤ *0PPm | 0.**1% |
| Arsenic(As2O3) | - - - - | ≤ 1PPm | - - - - |
| Other amino acids | - - - - | Conforms | - - - - |
| Loss on drying | ≤ 0.5 % | ≤ 0. *0 % | ≤ 0.5 % |
| Residue on ignition (Sulfated) | ≤ 0. 3 % | ≤ 0. 1 % | ≤ 0. 3 % |
| PH | 2.**3.0 | 2.**3.5 | 2. **3.0 |
| Assay | *8. ***0 1 .0% | *8.****1.0% | *8.****1.0% |
| L-cystine L-Cysteine | ≤ 0.5 % ≤ 0.5 % |
- - - - | Ninhydrin-positive substances: ≤ 0.5 % |
