Sulfamethoxazole-13C6 CAS 1196157-90-0
| CAS No. | 1196157-90-0 |
| Molecular Formula | C4[13C]6H11N3O3S |
| Molecular Weight | 259.23 g/mol |
| 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.
Sulfamethoxazole-13C6 (CAS 1196157-90-0), molecular formula C4[13C]6H11N3O3S and molecular weight 259.23 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, Sulfamethoxazole-13C6 is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 259.23 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.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C4[13C]6H11N3O3S |
| Molecular Weight | 259.23 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 2.0 |
| CAS Registry Year (est.) | 1989 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Sulfamethoxazole Standards
- Sulfamethoxazole-d4 (CAS 1020719-86-1)
- Sulfamethoxazole EP Impurity F (CAS 17103-52-5)
- Sulfamethoxazole (CAS 723-46-6)
- Sulfamethoxazole EP Impurity A (CAS 21312-10-7)
- Sulfamethoxazole Impurity 9 (CAS 18607-98-2)
- Sulfamethoxazole EP Impurity B (CAS 135529-16-7)
- Sulfamethoxazole Impurity 11 (CAS CATO-C4X-190911)
- Sulfamethoxazole N4-glucoside (alpha/beta mixture) (CAS 119691-75-7)
Recommended Standards
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- {2-[4-(2-methoxyethyl)-4H-1,2,4-triazol-3-yl]ethyl}amine hydrochloride (CAS 1262774-52-6)
- 7-(Trifluoromethyl)-3-azabicyclo[4.1.0]heptane hydrochloride (CAS 1818847-27-6)
- (±)-Norcantharidin (CAS 29745-04-8)
- 4-Ethoxy-N-isopentylaniline (CAS 1019490-32-4)
- 6-Ethyl-3,4,5,6,7,8-hexahydro-1,6-naphthyridin-2(1H)-one (CAS 1368239-05-7)
- Peptide Impurity 04 (CAS 2913424-91-4)
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