2,7-Dibenzodichloro-p-Dioxin CAS 33857-26-0
| CAS No. | 33857-26-0 |
| Molecular Formula | C12H6Cl2O2 |
| Molecular Weight | 253.08 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO supplies 2,7-Dibenzodichloro-p-Dioxin (CAS 33857-26-0), a certified reference material (molecular formula C12H6Cl2O2, MW 253.08 g/mol) for analytical method development and quality control.
Structurally, 2,7-Dibenzodichloro-p-Dioxin (C12H6Cl2O2) 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 9.0, corresponding to approximately 9 ring(s) or double-bond equivalent(s). With a molecular weight of 253.08 g/mol, it falls into the medium-molecular-weight range. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C12H6Cl2O2 |
| Molecular Weight | 253.08 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1966 |
| Halogen Content | Cl-containing |
Recommended Standards
- 2,6-Naphthalenedicarboxylic diacid dichloride (CAS 2351-36-2)
- 2-fluoro-3-methoxy-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine (CAS 2121513-86-6)
- 2',5'-Dichloro-[1,1'-biphenyl]-2,5-dione (CAS 79756-69-7)
- 2-Fluoro-3-methoxy-4-pyridineboronic acid pinacol ester (CAS 2121513-24-2)
- 2-((4-Amino-6-oxo-1,6-dihydropyrimidin-2-yl)thio)acetamide (CAS 333410-90-5)
- Chromium, tetracarbonyl(methoxyphenylmethylene)(tributylphosphine)- (CAS 63121-21-1)
- 3-(2h-Benzo[d][1,2,3]triazol-2-yl)-5-(2,2,2-trifluoroethoxy)aniline (CAS 861412-93-3)
- (3-methyl-1,2,4-oxadiazol-5-yl)methanol (CAS 112960-56-2)
- 4-(Cyclohexylamino)-6-phenyl-2-({[3-(trifluoromethyl)phenyl]methyl}sulfanyl)pyrimidine-5-carbonitrile (CAS 303985-68-4)
- ((3R,4R)-4-Methylpyrrolidin-3-yl)methanol (CAS 942618-25-9)
- Lornoxicam Impurity 80 (CAS CATO-C4X-201680)
- 2-Amino-3-(4-chlorophenyl)-4,4,4-trifluorobutanoic acid (CAS 1272758-00-5)
- 2-(Isopropyl(methyl)amino)-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carbaldehyde (CAS 333325-09-0)
- Liraglutide Impurity 13 TFA Salt (CAS CATO-C4X-199213)
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