Trimethoprim-13C3 CAS 1189970-95-3
| CAS No. | 1189970-95-3 |
| Molecular Formula | C11[13C]3H18N4O3 |
| Molecular Weight | 293.30 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 293.30 g/mol gives Trimethoprim-13C3 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
Trimethoprim-13C3 (CAS 1189970-95-3) is a high-purity analytical reference standard with the molecular formula C11[13C]3H18N4O3 and a molecular weight of 293.30 g/mol.
Based on its molecular formula C11[13C]3H18N4O3, Trimethoprim-13C3 contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 293.30 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.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO manufactures Trimethoprim-13C3 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 | C11[13C]3H18N4O3 |
| Molecular Weight | 293.30 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | >95% |
| Storage | Store at 2-8°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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1989 |
| Nitrogen Atoms | 4 |
Related Trimethoprim Standards
- Trimethoprim-d3 (CAS 1189923-38-3)
- Trimethoprim Impurity 1 (CAS 93885-69-9)
- Trimethoprim EP Impurity D (CAS 92440-76-1)
- Trimethoprim EP Impurity E (CAS 60729-91-1)
- Trimethoprim (CAS 738-70-5)
- Trimethoprim-d9 (CAS 1189460-62-5)
- Trimethoprim EP Impurity B (CAS 30806-86-1)
- Trimethoprim EP Impurity A (CAS 213745-86-9)
Recommended Standards
- Sivelestat sodium impurity 22 (CAS 1655497-02-1)
- N2-cyclohexyl-6-((trifluoromethyl)thio)-1,3,5-triazine-2,4-diamine (CAS 1134331-25-1)
- Bumetanide Impurity 50 (CAS 37531-34-3)
- (3-Trifluoromethylsulfanyl-propyl)-carbamic acid benzyl ester (CAS 1208079-56-4)
- Methyl 1,2,3,4-tetrahydroquinoline-5-carboxylate hydrochloride (CAS 1334147-75-9)
- NIAD-4 (CAS 868592-56-7)
- 1-Bromo-2-(4-bromobutyl)benzene (CAS 1342870-80-7)
- (4-Chloro-3,5-dimethylphenyl)methanol (CAS 18982-59-7)
- 1-(P-tolyl)pentan-1-amine (CAS 198421-11-3)
- Relugolix Impurity 210 (CAS CATO-C4X-2429210)
- 4-Hydroxy-7-(trifluoromethoxy)quinazoline (CAS 1260759-77-0)
- 2-(2-(Difluoromethoxy)-6-hydroxybenzoyl)pyridine (CAS 1261807-58-2)
- Tert-butyl 4-amino-4-(4-methoxybenzyl)piperidine-1-carboxylate (CAS 1707602-61-6)
- Semaglutide impurity 66 (CAS CATO-C4X-222666)
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