6,7-Dichloro-1,4-bis(p-tolylamino)anthracene-9,10-dione CAS 70729-59-8
| CAS No. | 70729-59-8 |
| Molecular Formula | C28H20Cl2N2O2 |
| Molecular Weight | 487.38 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
6,7-Dichloro-1,4-bis(p-tolylamino)anthracene-9,10-dione (CAS 70729-59-8), molecular formula C28H20Cl2N2O2 and molecular weight 487.38 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 6,7-Dichloro-1,4-bis(p-tolylamino)anthracene-9,10-dione (C28H20Cl2N2O2) is characterized by a steroid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C28H20Cl2N2O2 |
| Molecular Weight | 487.38 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 19.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1977 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Dichloro Standards
- 1,3-Dichloro-4-methyl-2-nitrobenzene (CAS 13790-14-2)
- Methyl 2-[(2-{[2,4-dichloro-5-(2-methoxyethoxy)phenyl]carbamoyl}-2-hydroxy-2-methylethyl)sulfanyl]benzoate (CAS 866136-35-8)
- 6,7-Dichloro-4-(4-chlorophenyl)-2-(4-(trifluoromethoxy)phenyl)phthalazin-1(2H)-one (CAS 161716-24-1)
- Ethyl 2-(2,4-dichloro-5-(6,7-dimethoxy-4-oxo-2-thioxo-1,4-dihydroquinazolin-3(2H)-yl)phenoxy)acetate (CAS 400088-23-5)
- 6-(2,6-Dichloro-3,5-dimethoxyphenyl)-N-(2-methyl-6-nitrophenyl)quinazolin-2-amine (CAS 1538605-09-2)
- Bis(5,7-dichloro-8-quinolinato)copper(II) (CAS 14039-98-6)
- 2,3-Dichloro-N-(1-(3-methoxybenzyl)-5,6-dimethyl-1H-benzo[d]imidazol-4-yl)benzenesulfonamide (CAS 338955-25-2)
- 2,4-Dichloro-N-(1-(3-methoxybenzyl)-5,6-dimethyl-1H-benzo[d]imidazol-4-yl)benzenesulfonamide (CAS 866038-57-5)
Recommended Standards
- Sofosbuvir Impurity 62 (CAS CATO-C4X-105262)
- Azido-PEG5-CH2CO2-PFP (CAS 2144777-92-2)
- SB 258585 (CAS 209480-63-7)
- N-(3-Chloro-4-fluorophenyl)-2-((5-(4-chlorophenyl)-4-(p-tolyl)-4H-1,2,4-triazol-3-yl)thio)acetamide (CAS 477330-53-3)
- 3-(Difluoromethyl)-5-methyl-4-nitropyridin-2-amine (CAS 1806797-32-9)
- N-(4-Amino-6-(cyclopropylamino)-1,3,5-triazin-2-yl)heptanamide (CAS 99135-47-4)
- 4-Cyclopropyl-5-(4-methylpiperidin-1-yl)-4h-1,2,4-triazole-3-thiol (CAS 923121-82-8)
- 3-(2,2,2-Trifluoroethyl)piperidine (CAS 1368342-91-9)
- Ethyl 2-bromo-6-cyano-3-(trifluoromethyl)benzoate (CAS 1807023-60-4)
- 1-(4-Ethoxybenzyl)dihydropyrimidine-2,4(1H,3H)-dione (CAS 55383-99-8)
- 2-(tert-Butyl)-4-cyclopropoxypyridine (CAS 1243322-73-7)
- 4-(Phenylethynyl)benzoic Acid (CAS 25739-23-5)
- Edoxudine (CAS 15176-29-1)
- 3X Flag Peptide trifluoroacetate salt (CAS 402750-12-3)
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