DL-Cysteine- CAS 10318-18-0
| CAS No. | 10318-18-0 |
| Molecular Formula | C3H7NO2S |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C3H7NO2SHCl, DL-Cysteine- contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic functional-group stretching vibrations in infrared spectroscopy. The molecular weight of 157.61 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
DL-Cysteine- (CAS 10318-18-0), molecular formula C3H7NO2SHCl and molecular weight 157.61 g/mol, is a CATO reference standard with documented purity and traceability.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C3H7NO2S HCl |
| Molecular Weight | 157.61 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 0.0 |
| CAS Registry Year (est.) | 1959 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related DL Standards
- DL-Cysteine hydrochloride monohydrate (CAS 116797-51-4)
- DL-Cysteine-3,3-d2 (CAS 124051-54-3)
- L-Cysteine-Glutathione Disulfide (CAS 13081-14-6)
- L-Cysteine Sulfinic Acid 2 (CAS 1315057-92-1)
- D-Cysteine, N-[(9H-fluoren-9-ylmethoxy)carbonyl]-S-methyl- (CAS 1393524-09-8)
- DL-Cysteine-3- (CAS 150146-94-4)
- L-Cysteine S-sulfate sodium salt sesquihydrate (CAS 150465-29-5)
- L-Cysteine-D-penicillamine Disulfide (CAS 18840-45-4)
Recommended Standards
- Ethyl 4-oxo-4-phenyl-2-((4-phenyl-1H-1,2,4-triazol-5(4H)-ylidene)methyl)but-2-enoate (CAS 80535-24-6)
- 2-((2-Isopropyl-5-methylcyclohexyl)amino)propan-1-ol (CAS 1218194-46-7)
- 3-Chloro-5-((2-chlorobenzyl)sulfinyl)-1,2,4-thiadiazole (CAS 845879-26-7)
- 5-(pyridin-2-ylthio)furan-2-carbaldehyde (CAS 709635-68-7)
- Gastrodin Impurity 3 (CAS 15397-25-8)
- 2-(2-Hydroxy-5-methoxybenzylidene)malononitrile (CAS 771574-72-2)
- 1-chloro-2-(2-isocyanatoethyl)benzene (CAS 93489-11-3)
- 3-(4,5-Dimethyl-4h-1,2,4-triazol-3-yl)thiophen-2-amine (CAS 1250619-92-1)
- Imipenem impurity 135 (CAS CATO-C4X-1662135)
- Liraglutide Sodium Salt (CAS 204656-20-2（free base）)
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