Isatin CAS 91-56-5
| CAS No. | 91-56-5 |
| Molecular Formula | C8H5NO2 |
| Molecular Weight | 147.13 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO manufactures Isatin 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.
CATO supplies Isatin (CAS 91-56-5), a certified reference material (molecular formula C8H5NO2, MW 147.13 g/mol) for analytical method development and quality control.
Based on its molecular formula C8H5NO2, Isatin 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 147.13 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C8H5NO2 |
| Molecular Weight | 147.13 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 1 |
Related Isatin Standards
- Isatin-3-oxime (CAS 607-28-3)
- Isatin-β-thiosemicarbazone (CAS 27830-79-1)
- Isatin-5-sulfonic Acid Monosodium Salt Monohydrate (CAS 303137-11-3)
- 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 Bis-cresol (CAS 47465-97-4)
Recommended Standards
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- N-(Tetrahydro-2H-pyran-4-yl)-N-(2-(thiophen-2-yl)ethyl)cyclopropanecarboxamide (CAS 1798618-40-2)
- NCGC00378430 (CAS 920650-00-6)
- 4-Bromooxazolo[4,5-c]pyridin-2(3H)-one (CAS 1936731-52-0)
- 3X Flag Peptide trifluoroacetate salt (CAS 402750-12-3)
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