D-Cysteine hydrochloride (s)-2-amino-3-mercaptopropanoic acid hydrochloride d-cysteine hcl h-d-cys-oh hcl d-cysh hcl 32443-99-5 CAS 32443-99-5
| CAS No. | 32443-99-5 |
| Molecular Formula | C3H7NO2S |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
D-Cysteine hydrochloride (s)-2-amino-3-mercaptopropanoic acid hydrochloride d-cysteine hcl h-d-cys-oh hcl d-cysh hcl 32443-99-5 (CAS 32443-99-5) is a high-purity analytical reference standard with the molecular formula C3H7NO2SHClH2O and a molecular weight of 175.63 g/mol.
Structurally, D-Cysteine hydrochloride (s)-2-amino-3-mercaptopropanoic acid hydrochloride d-cysteine hcl h-d-cys-oh hcl d-cysh hcl 32443-99-5 (C3H7NO2SHClH2O) contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of -1.0, corresponding to approximately 0 ring(s) or double-bond equivalent(s). With a molecular weight of 175.63 g/mol, it falls into the medium-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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.
Physical & Chemical Properties
| Molecular Formula | C3H7NO2S HCl H2O |
| Molecular Weight | 175.63 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | -1.0 |
| CAS Registry Year (est.) | 1966 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related D Standards
- DL-Cysteine- (CAS 10318-18-0)
- 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)
Recommended Standards
- 2-(3,3-Difluorocyclopentyl)acetic acid (CAS 1260837-43-1)
- N-(p-Tolyl)-4-(trifluoromethyl)benzenesulfonamide (CAS 1286478-99-6)
- Nitrilotriacetic acid (CAS 139-13-9)
- Allobarbital (CAS 52-43-7)
- 3-Amino-1-(2-methylcyclopropyl)propan-1-ol (CAS 1561605-06-8)
- 5-Bromo-3-ethyl-2-methyl-1H-indole (CAS 646038-04-2)
- 8-Chloro-2-phenylquinoline-4-carbohydrazide (CAS 854867-67-7)
- 5-Oxo-2-azabicyclo[2.2.1]heptane-2-carboxylic Acid Phenylmethyl Ester (CAS 140927-13-5)
- 6-([1,1'-Biphenyl]-4-yl)imidazo[2,1-b]thiazole-5-carbaldehyde (CAS 82588-43-0)
- Urotensin II-Related Peptide (human, mouse, rat) (CAS 342878-90-4)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com