Isatin-5-sulfonic Acid Monosodium Salt Monohydrate CAS 303137-11-3
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 303137-11-3 |
| Molecular Formula | C8H5NO5S Na H2O |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Isatin-5-sulfonic Acid Monosodium Salt Monohydrate (CAS 303137-11-3) reference standard, produced by CATO (ISO 17034 / CNAS / ANAB accredited). Molecular formula: C8H5NO5S Na H2O. Trusted by 10,000+ laboratories worldwide for pharmaceutical analysis and QC.
Physical & Chemical Properties
| Molecular Formula | C8H5NO5S Na H2O |
| Molecular Weight | 268.19 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| 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.) | 2025 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Isatin Standards
- Isatin-β-thiosemicarbazone (CAS 27830-79-1)
- Isatin Bis-cresol (CAS 47465-97-4)
- Isatin-3-oxime (CAS 607-28-3)
- 80789-74-8 Isatin-5-sulfonic acid 1H-Indole-5-sulfonic acid, 2,3-dihydro-2,3-dioxo-, sodium salt 1H-Indole-5-sulfonic acid, 2,3-dihydro-2,3-dioxo-, monosodium salt 5-Indolinesulfonic acid, 2,3-dioxo- Isatin-5-sulfonic acid sodium salt Sodium 5-sulfoisatin Sodium 5-isatinsulfonate (CAS 80789-74-8)
- Isatin (CAS 91-56-5)
Recommended Standards
- N-(2-fluorophenyl)-2-hydroxy-N-methylpropanamide (CAS 1257227-64-7)
- 2-(2-Isopropylpyrazol-3-yl)-3-methylpyridine (CAS 1423037-25-5)
- 2-(4-Bromophenyl)-2-oxoethyl benzofuran-2-carboxylate (CAS 326886-76-4)
- 4-Phenoxyisobenzofuran-1,3-dione (CAS 54738-86-2)
- 1-(9-Cyano-1-methyl-1H-benzo[f]indol-4-yl)-3-phenylurea (CAS 439095-03-1)
- 2-Amino-5-chloro-N,N-diethylbenzamide (CAS 573692-57-6)
- [Plus-β-Ala28]-Semaglutide (CAS CATO-C4X-2226221)
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