S-Adenosyl-L-Methionine Impurity 21 CAS CATO-C4X-138121
| CAS No. | CATO-C4X-138121 |
| Molecular Formula | - |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| 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 S-Adenosyl-L-Methionine Impurity 21.
CATO supplies S-Adenosyl-L-Methionine Impurity 21 (CAS CATO-C4X-138121), a pharmacopoeial impurity reference standard (molecular formula C15H20D3N6O5SH2O4SHO4S, MW 597.60 g/mol) used for the identification and quantification of trace impurities in APIs.
The molecular framework of S-Adenosyl-L-Methionine Impurity 21 (C15H20D3N6O5SH2O4SHO4S) is characterized by deuterium isotope labeling, a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
As a certified reference material (CRM), S-Adenosyl-L-Methionine Impurity 21 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C15H20D3N6O5S H2O4S HO4S |
| Molecular Weight | 597.60 g/mol |
| Purity | >95% |
| Storage | Store in a cool place (≤25°C), protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 7.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 6 |
| Sulfur Atoms | 3 |
Related S Standards
- S-Adenosyl-L-Methionine Impurity 19 (CAS 13484-65-6)
- S-Adenosyl-D-methionine (CAS 14031-35-7)
- S-Adenosyl-L-Methionine Impurity 17 (CAS 2095880-61-6)
- ADENOSYL-L-METHIONINE CHLORIDE, S- (CAS 24346-00-7)
- S-Adenosyl-L-Methionine (CAS 29908-03-0)
- S-Adenosyl-L-Methionine Impurity 18 (CAS 37063-35-7)
- S-Adenosyl-L-Methionine Impurity 10 (CAS 4229-50-9)
- S-Adenosyl-L-methionine 4-methylbenzenesulfonic acid bis(4-methylbenzenesulfonate) salt (CAS 52248-04-1)
Recommended Standards
- Baclofen impurity 73（E-Isomer） (CAS CATO-C4X-101273)
- Tofacitinib Impurity 14 (CAS 1809002-40-1)
- Linagliptin impurity 153 (CAS CATO-C4X-1101153)
- Abiraterone Impurity 80 (CAS CATO-C4X-107080)
- rel-(3R,4S)-3-Nitro-4-phenyl-1-(2,2,2-trifluoroethyl)pyrrolidine (CAS 1951371-38-2)
- 2-Methyl-3-phenylisoquinolin-1(2H)-one (CAS 34497-10-4)
- Ethyl 5-(3,4-difluorophenyl)-1H-pyrazole-3-carboxylate (CAS 1187635-57-9)
- N,N-diisopropyl-2-(piperazin-1-yl)acetamide (CAS 59955-90-7)
- Glycerol 1-Oleyl Ether (CAS 593-31-7)
- Des-Ile12-Aib13-Tirzepatide (CAS CATO-CPTD788960)
Why CATO?
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