4-Chloro-1H-indene-1,3(2H)-dione CAS 20926-88-9
| CAS No. | 20926-88-9 |
| Molecular Formula | C9H5ClO2 |
| Molecular Weight | 180.59 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, 4-Chloro-1H-indene-1,3(2H)-dione (C9H5ClO2) contains a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 7.0, corresponding to approximately 7 ring(s) or double-bond equivalent(s). With a molecular weight of 180.59 g/mol, it falls into the medium-molecular-weight range. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
4-Chloro-1H-indene-1,3(2H)-dione (CAS 20926-88-9), molecular formula C9H5ClO2 and molecular weight 180.59 g/mol, is a CATO reference standard with documented purity and traceability.
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 4-Chloro-1H-indene-1,3(2H)-dione 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 | C9H5ClO2 |
| Molecular Weight | 180.59 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |
| Halogen Content | Cl-containing |
Related Chloro Standards
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Recommended Standards
- 4-chloro-1H-1,6-naphthyridin-2-one (CAS 2503202-03-5)
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- 4-Chloro-1,8-naphthyridin-2(1H)-one (CAS 59514-93-1)
- 4-Chloro-2-(furan-2-yl)pyrimidine (CAS 27130-92-3)
- Nα-acetyl-5-methoxy-D-tryptophan (CAS 1029430-13-4)
- 2-(2,4-Dichlorobenzylidene)hydrazinecarboximidamide (CAS 46322-66-1)
- (E)-2,2,2-trifluoro-N-(3-(hydroxyimino)-5,6-dimethoxy-2,3-dihydro-1H-inden-1-yl)acetamide (CAS 861209-51-0)
- N-(3-Chlorophenyl)-2-mercaptoacetamide (CAS 35331-31-8)
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- 2-Methoxy-5-(N-((4-methoxytetrahydro-2H-thiopyran-4-yl)methyl)sulfamoyl)benzamide (CAS 2034487-06-2)
- 3-[4-(trifluoromethoxy)phenyl]piperazin-2-one (CAS 1246548-45-7)
- 3-Iodo-1H-pyrazolo[3,4-b]pyrazine (CAS 1279894-07-3)
- 5-(4-Chlorophenyl)-6-(trifluoromethyl)pyrimidine-2,4-diamine (CAS 2263-96-9)
- Semaglutide impurity 98 (CAS CATO-C4X-222698)
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