2,7-Dichloro-3,6-dihydroxy-3-oxo-3H-spiro-[isobenzofuran-1,9-xanthene]-5-carboxylic acid CAS 142975-81-3
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 142975-81-3 |
| Molecular Formula | C21H10Cl2O7 |
| Molecular Weight | 445.21 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 2,7-Dichloro-3,6-dihydroxy-3-oxo-3H-spiro-[isobenzofuran-1,9-xanthene]-5-carboxylic acid (CAS 142975-81-3), a pharmaceutical standards reference standard manufactured under ISO 17034 accreditation. Molecular formula: C21H10Cl2O7. Molecular weight: 445.21 g/mol. Batch-specific COA and technical support are available on request.
Physical & Chemical Properties
| Molecular Formula | C21H10Cl2O7 |
| Molecular Weight | 445.21 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at room temperature, protect from light, keep sealed and dry |
| 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) | 16.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1997 |
| Halogen Content | Cl-containing |
Related Dichloro Standards
- 2',7'-Dichloro-3',6'-dihydroxy-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthene]-6-carboxylic acid (CAS 144316-86-9)
- 1-(2,4-Dichloro-5-methoxyphenyl)-5-methyl-N-[3-(trifluoromethyl)phenyl]-1H-1,2,4-triazole-3-carboxamide (CAS 339015-15-5)
- 2,4-Dichloro-N-(3-cyano-4-((4-methoxyphenyl)sulfinyl)phenyl)benzamide (CAS 477710-03-5)
- 2,4-Dichloro-N-(3-cyano-4-tosylphenyl)benzamide (CAS 477859-12-4)
- 3,4-Dichloro-N-(3-cyano-4-(o-tolylsulfonyl)phenyl)benzamide (CAS 320421-34-9)
- 3,5-Dichloro-N-[3-cyano-4-(4-methylbenzenesulfonyl)phenyl]benzamide (CAS 320421-33-8)
- 2,4-Dichloro-5-iodo-7-{[2-(trimethylsilyl)ethoxy]methyl}-7H-pyrrolo[2,3-d]pyrimidine (CAS 1404364-72-2)
- 3,4-Dichloro-N-(3-fluoro-4-(4-(methylsulfonyl)piperazin-1-yl)phenyl)benzamide (CAS 478260-26-3)
Recommended Standards
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- Opicapone impurity 29 (CAS CATO-C4X-240429)
- 1-Fluoro-2,4,5-trimethylbenzene (CAS 400-01-1)
- n1,n1,3-Trimethylpentane-1,2-diamine (CAS 1021146-46-2)
- Montelukast Impurity N27 (CAS 610-97-9)
- 2-Amino-5-chloro-3-methoxybenzoic acid (CAS 58026-22-5)
- 3,4-Dihydroxy-5-nitrobenzonitrile (CAS 116313-86-1)
- {2-[(4-methylphenyl)sulfanyl]pyridin-3-yl}methyl N-phenylcarbamate (CAS 478031-15-1)
- Cholecystokinin Octapeptide (desulfated) (H-2070.0005) (CAS 198483-36-2)
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 13829788188 / jacky.chen@cato-chem.com