4',5'-Dichloro-3',6'-dihydroxy-2',7'-dimethoxy-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthene]-5-carboxylic acid CAS 82855-39-8
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 82855-39-8 |
| Molecular Formula | C23H14Cl2O9 |
| Molecular Weight | 505.26 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4',5'-Dichloro-3',6'-dihydroxy-2',7'-dimethoxy-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthene]-5-carboxylic acid (CAS 82855-39-8) reference standard, produced by CATO (ISO 17034 / CNAS / ANAB accredited). Molecular formula: C23H14Cl2O9. Molecular weight: 505.26 g/mol. Trusted by 10,000+ laboratories worldwide for pharmaceutical analysis and QC.
Physical & Chemical Properties
| Molecular Formula | C23H14Cl2O9 |
| Molecular Weight | 505.26 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.) | 1980 |
| Halogen Content | Cl-containing |
Related Dichloro Standards
- 4',5'-Dichloro-3',6'-dihydroxy-2',7'-dimethoxy-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthene]-6-carboxylic acid (CAS 82855-40-1)
- 2,5-Dichloro-N-(9-styrylacridin-2-yl)benzenesulfonamide (CAS 88522-60-5)
- 2,4-Dichloro-N-(2-((2-((3-chloro-5-(trifluoromethyl)pyridin-2-yl)amino)ethyl)amino)pyridin-3-yl)benzamide (CAS 338772-73-9)
- 4-[(3,4-Dichloro-1-methyl-1H-pyrazol-5-yl)oxy]-N-tridecylbenzene-1-sulfonamide (CAS 318284-30-9)
- 1-(2,6-Dichloro-4-(trifluoromethyl)phenyl)-5-(3,4-dichlorophenyl)-4-(methylsulfonyl)-1H-pyrazole (CAS 400088-06-4)
- 2,4-Dichloro-N-(2-((2-((3-chloro-5-(trifluoromethyl)pyridin-2-yl)amino)ethyl)amino)phenyl)benzamide (CAS 338772-79-5)
- 1-(2,6-Dichloro-4-(perfluoropropan-2-yl)phenyl)-4-iodo-1h-pyrazole (CAS 2084123-37-3)
- 2-((2,5-Dichloro-N-phenylphenyl)sulfonamido)-N-(3-(trifluoromethyl)phenyl)acetamide (CAS 339103-16-1)
Recommended Standards
- N-(4-bromophenyl)-3-((2,6-dichlorobenzyl)sulfonyl)thiophene-2-carboxamide (CAS 251097-58-2)
- 1-(2,4-Dichlorophenyl)-5-(3,4-dichlorophenyl)-N-(3,5-dimethylphenyl)-1H-pyrazole-3-carboxamide (CAS 477713-21-6)
- Delafloxacin impurity 37 (CAS CATO-C4X-263737)
- N,N-Bis(2-bromoethyl)-9H-fluoren-2-amine (CAS 6036-92-6)
- N-Dansyl-6-aminohexanol, 97% (CAS 110232-19-4)
- 4-(3-azetidinyl)-Thiomorpholine 1,1-dioxide, 2,2,2-trifluoroacetate (1:2) (CAS 1980064-31-0)
- Vortioxetine Impurity 118 (CAS 94041-16-4)
- 1-Ethoxy-2,3-difluoro-4-(trans-4-pentylcyclohexyl)benzene (CAS 124729-02-8)
- 2-(5-Chloroquinolin-8-yl)acetic acid (CAS 1564787-54-7)
- Peptide 433 (CAS CATO-CPTD788433)
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