(R)-2-Amino-3-mercapto-2-methylpropanoic acid CAS 441317-73-3
| CAS No. | 441317-73-3 |
| Molecular Formula | C4H9NO2S |
| Molecular Weight | 135.18 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including (R)-2-Amino-3-mercapto-2-methylpropanoic acid.
(R)-2-Amino-3-mercapto-2-methylpropanoic acid (CAS 441317-73-3), molecular formula C4H9NO2S and molecular weight 135.18 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C4H9NO2S, (R)-2-Amino-3-mercapto-2-methylpropanoic acid contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage; these features give the compound characteristic functional-group stretching vibrations in infrared spectroscopy. The molecular weight of 135.18 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.
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 | C4H9NO2S |
| Molecular Weight | 135.18 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 1.0 |
| CAS Registry Year (est.) | 2025 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related R Standards
- (2S)-2-amino-2-methyl-3-sulfanyl-propanoic acid (CAS 239101-34-9)
- (R)-2-Amino-3-mercapto-2-methylpropanoic acid (CAS 22681-73-8)
- 2-amino-3-(methylsulfanyl)propanoic acid (CAS 7728-98-5)
- 2-amino-4-sulfanylbutanoic acid (CAS 454-28-4)
- 3-Amino-4-sulfanylbutanoic acid (CAS 21100-02-7)
- (R)-2-Amino-3-mercaptopropanehydrazide (CAS 58100-26-8)
- 2-Amino-3-mercaptopropanehydrazide (CAS 70470-68-7)
- 2-Amino-6,7-dihydro-5H-cyclopenta[d]pyrimidine (CAS 108990-72-3)
Recommended Standards
- (R)-3-Aminotetrahydrothiophene 1,1-dioxide (CAS 909128-52-5)
- (2S,3S)-2-Amino-3-mercaptobutanoic acid (CAS 43083-49-4)
- (S)-3-Aminotetrahydrothiophene 1,1-dioxide (CAS 909128-54-7)
- 1,1-Dioxide-4-thiomorpholine (CAS 39093-93-1)
- 1-(2,4-Dichlorophenyl)-5-(trifluoromethyl)-1H-pyrazole-4-carboxylic acid (CAS 98534-78-2)
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- 1-(2-Nitro-4-(trifluoromethyl)phenyl)-1H-pyrrole (CAS 136773-58-5)
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- 1-(Benzo[d][1,2,3]thiadiazol-5-yl)-3-(2,6-dimethylphenyl)urea (CAS 866042-25-3)
- 4-(3-(2-Cyano-4,5-dimethoxyphenyl)thioureido)-N,N-dimethylbenzenesulfonamide (CAS 692287-56-2)
- 6-Hydroxydodecanoic acid (CAS 35875-13-9)
- 1-Bromo-2,4-dimethyl-3-nitrobenzene (CAS 39053-43-5)
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- Tirzepatide Impurity 22 X TFA Salt (CAS CATO-C4X-324022)
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