1-Butyl-3-(1,1-dioxido-2H-1,2,4-benzothiadiazin-3-yl)-4-hydroxy-2(1H)-quinolinone 303776-83-2 CAS 303776-83-2
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 303776-83-2 |
| Molecular Formula | C20H19N3O4S |
| Molecular Weight | 397.45 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
1-Butyl-3-(1,1-dioxido-2H-1,2,4-benzothiadiazin-3-yl)-4-hydroxy-2(1H)-quinolinone 303776-83-2 (CAS 303776-83-2) reference standard, produced by CATO (ISO 17034 / CNAS / ANAB accredited). Molecular formula: C20H19N3O4S. Molecular weight: 397.45 g/mol. Trusted by 10,000+ laboratories worldwide for pharmaceutical analysis and QC.
Physical & Chemical Properties
| Molecular Formula | C20H19N3O4S |
| Molecular Weight | 397.45 g/mol |
| Purity | 97%+ |
| 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) | 13.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
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Recommended Standards
- Z-Gly-Gly-Met-OH (CAS 75501-70-1)
- 861211-03-2 KS-00001V38 methyl 4-({2-[2-(4-methylphenyl)-1,3-thiazol-4-yl]ethyl}amino)-3-nitrobenzenecarboxylate (CAS 861211-03-2)
- N-(2,3-Dihydrobenzo[b][1,4]dioxin-6-yl)-2-((4-ethyl-5-(pyridin-4-yl)-4H-1,2,4-triazol-3-yl)thio)acetamide (CAS 557063-71-5)
- 1-(2,4-Difluorophenyl)ethan-1-amine (CAS 603951-43-5)
- Naphtho[2,1-b]furan-2-carboxamide (CAS 69789-96-4)
- 6-(4-Chlorophenyl)-2-hydroxy-6-oxohex-4-enoic acid (CAS 91254-63-6)
- Poly(1,3,4-thiadiazole-2,5-diyldithio) (CAS 79509-46-9)
- 3-Chloro-2-[(4-methylphenyl)sulfanyl]aniline (CAS 199803-23-1)
- 3-[(2,6-Dichlorophenyl)methanesulfonyl]-5-methyl-1,2-thiazole-4-carbonitrile (CAS 339021-09-9)
- Semaglutide Impurity 187 (CAS CATO-C4X-2226187)
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