1,2,3,8,9-Pentachlorodibenzo-p-dioxin CAS 71925-18-3
| CAS No. | 71925-18-3 |
| Molecular Formula | C12H3Cl5O2 |
| Molecular Weight | 356.42 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 1,2,3,8,9-Pentachlorodibenzo-p-dioxin.
1,2,3,8,9-Pentachlorodibenzo-p-dioxin (CAS 71925-18-3) is a high-purity analytical reference standard with the molecular formula C12H3Cl5O2 and a molecular weight of 356.42 g/mol.
Based on its molecular formula C12H3Cl5O2, 1,2,3,8,9-Pentachlorodibenzo-p-dioxin contains a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 356.42 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
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 | C12H3Cl5O2 |
| Molecular Weight | 356.42 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 |
| 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.) | 1977 |
| Halogen Content | Cl-containing |
Related Pentachlorodibenzo Standards
- 1,2,3,4,7-Pentachlorodibenzo-p-dioxin (CAS 39227-61-7)
- 1,2,3,7,8-Pentachlorodibenzo-p-dioxin (CAS 40321-76-4)
- 1,2,4,7,8-Pentachlorodibenzo-p-dioxin (CAS 58802-08-7)
- 1,2,3,7,8-pentachlorodibenzo[b,d]furan (CAS 57117-41-6)
- 1,2,4,6,7-Pentachlorodibenzo[b,d]furan (CAS 83704-50-1)
- 1,2,4,7,9-Pentachlorodibenzo[b,d]furan (CAS 71998-74-8)
- 1,2,4,8,9-Pentachlorodibenzo[b,d]furan (CAS 70648-23-6)
- 2,3,4,6,7-Pentachlorodibenzo[b,d]furan (CAS 57117-43-8)
Recommended Standards
- 1-Benzyl-3-(2,4-dimethylphenyl)quinazoline-2,4(1H,3H)-dione (CAS 60942-87-2)
- 1,1-Isophthaloylbiscaprolactam (CAS 7381-13-7)
- 1-Phenyl-4-(4-phenylpiperazin-1-yl)-1H-pyrazolo[3,4-d]pyrimidine (CAS 393845-64-2)
- (S)-4-(1-(2H-Indazol-2-yl)ethyl)-N-(2-aminophenyl)benzamide (CAS 920315-10-2)
- (S)-1-benzyl-2-(4-(2-(2-phenyl-1H-benzo[d]imidazol-1-yl)-2-(piperidin-4-yl)ethoxy)phenyl)-1H-benzo[d]imidazole dihydrochloride (CAS 1440898-82-7)
- 2-Chloro-N-(4-methylpyrimidin-2-yl)benzamide (CAS 882866-00-4)
- 3-chloro-N-[4-(pyrrolidin-1-ylsulfonyl)phenyl]propanamide (CAS 895691-70-0)
- Propionamidine (CAS 39800-84-5)
- 1,4-Benzoquinone-2,4-dinitrophenylhydrazine (mono) (CAS 16081-15-5)
- 2-(p-Tolyloxy)pyridine (CAS 4783-71-5)
- Dapagliflozin Impurity 136 (CAS CATO-C4X-1138136)
- (3S)-3-iodopyrrolidine;hydrochloride (CAS 1354011-67-8)
- 2-Hydroxy-4-(perfluoroethyl)pyrimidine-5-carboxylic acid (CAS 306960-69-0)
- Palmitoyl Tripeptide -5 · 2 TFA (CAS 623172-56-5)
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