Anthraquinone Impurity 2 CAS 2961-04-8
| CAS No. | 2961-04-8 |
| Molecular Formula | C14H8O5 |
| Molecular Weight | 256.21 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 Anthraquinone Impurity 2.
CATO supplies Anthraquinone Impurity 2 (CAS 2961-04-8), a certified reference material (molecular formula C14H8O5, MW 256.21 g/mol) for analytical method development and quality control.
The molecular framework of Anthraquinone Impurity 2 (C14H8O5) is characterized by a carboxylic acid group, a hydroxyl group, an ether linkage, a polycyclic aromatic system. In reversed-phase chromatography, its retention is governed primarily by the polarity and ionization state of its functional groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C14H8O5 |
| Molecular Weight | 256.21 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, 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; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
Related Anthraquinone Standards
- Anthraquinone-2-carboxylic Acid (CAS 117-78-2)
- Anthraquinone-2-carbonyl Chloride (CAS 6470-87-7)
- 9,10-Anthraquinone-2-sulfonicacid (CAS 84-48-0)
- Anthraquinone monohydrazone (CAS 3166-13-0)
- Anthraquinone-d8 (CAS 10439-39-1)
- Anthraquinone Related Compound 4 (CAS 69119-31-9)
- Anthraquinone Impurity 2 (CAS 92439-42-4)
- 1,4-Anthraquinone (CAS 635-12-1)
Recommended Standards
- Anthragallol (CAS 602-64-2)
- Dibenzo[b,d]furan-4,6-dicarboxylic acid (CAS 88818-47-7)
- 5-Cyano-2-(furan-3-carboxamido)benzoic acid (CAS 668976-01-0)
- N-(1,3-Dioxoisoindolin-5-yl)furan-2-carboxamide (CAS 384804-34-6)
- 2,5-Difluoro-N-methylbenzamide (CAS 392691-69-9)
- Ethyl 2-((3-(pyridin-4-yl)-[1,2,4]triazolo[4,3-b]pyridazin-6-yl)thio)butanoate (CAS 868970-37-0)
- (RS)-Pantoic Acid Sodium Salt (CAS 470-29-1(Free Acid))
- N-[(2,4-dimethylphenyl)methyl]cyclohexanamine (CAS 1019620-13-3)
- N-(4-amino-2-methoxyphenyl)benzofuran-2-carboxamide (CAS 335210-03-2)
- 5-Oxo-1-(p-tolyl)pyrrolidine-3-carboxylic acid (CAS 133747-57-6)
- 2-Methoxy-3-methyl-5-(1-propylpyrrolidin-2-yl)pyridine (CAS 1352518-56-9)
- 2-Chloro-5-(difluoromethyl)-4-methylnicotinaldehyde (CAS 1806895-27-1)
- 4-(Ethoxycarbonyl)-1H-indole-6-carboxylic acid (CAS 1638772-15-2)
- semaglutide (CAS 782487-28-9)
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