DL-Homocysteic-3,3,4,4-d4 Acid CAS 157203-91-3
| CAS No. | 157203-91-3 |
| Molecular Formula | - |
| Molecular Weight | 187.21 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
DL-Homocysteic-3,3,4,4-d4 Acid (CAS 157203-91-3) is a high-purity analytical reference standard with the molecular formula C4H5D4NO5S and a molecular weight of 187.21 g/mol.
Owing to deuterium isotope labeling, a carbohydrate-derived structure, an amide group, a sulfone group, DL-Homocysteic-3,3,4,4-d4 Acid is typically white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 187.21 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
CATO manufactures DL-Homocysteic-3,3,4,4-d4 Acid under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C4H5D4NO5S |
| Molecular Weight | 187.21 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 2001 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
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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