Phenylbutyrate EP Impurity A CAS 2051-95-8
| CAS No. | 2051-95-8 |
| Molecular Formula | C10H10O3 |
| Molecular Weight | 178.18 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
CATO supplies Phenylbutyrate EP Impurity A (CAS 2051-95-8), a pharmacopoeial impurity reference standard (molecular formula C10H10O3, MW 178.18 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C10H10O3, Phenylbutyrate EP Impurity A contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 178.18 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
CATO manufactures Phenylbutyrate EP Impurity A under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C10H10O3 |
| Molecular Weight | 178.18 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
Related Phenylbutyrate Standards
- Sodium Phenylbutyrate (CAS 1716-12-7)
- Phenylbutyrate (Acid) (CAS 1821-12-1)
- Ethyl 4-Phenylbutyrate (CAS 10031-93-3)
- Phenylbutyrate Impurity 14 (CAS 358349-85-6)
- Phenylbutyrate EP Impurity B (CAS 529-34-0)
- Phenylbutyrate Impurity 16 (CAS CATO-C4X-258316)
- Phenylbutyrate Impurity 5 (CAS 1443417-17-1)
- Phenylbutyrate Impurity 6 (CAS 1292210-87-7)
Recommended Standards
- 2-Acetyl-6-methylbenzoic acid (CAS 56661-76-8)
- Watermelon Ketone (CAS 28940-11-6)
- Diquafosol Impurity 14 (CAS 1603-79-8)
- 2-Quinoxalinecarboxylic Acid-D4 (CAS 2244217-89-6)
- Estradiol Valerate EP Impurity D (CAS 1359847-37-2)
- Fluticasone Propionate EP Impurity D (CAS 73205-13-7)
- Tedizolid Impurity 38 (CAS 874290-59-2)
- 2-(4-Nitrophenyl)imidazo[1,2-a]pyridine hydrobromide (CAS 173380-18-2)
- 2-methyl-5-(trifluoromethyl)morpholine (CAS 1375471-67-2)
- 3-Amino-2-(m-tolyl)pyrido[2,3-d]pyrimidin-4(3H)-one (CAS 1363405-26-8)
- 1,4-Dioxaspiro[4.5]dec-6-en-8-one (CAS 4683-24-3)
- Osimertinib Impurity N1 (CAS 1421372-67-9)
- Methyl 5-(2-Pyridyl)isoxazole-3-carboxylate (CAS 1375064-64-4)
- Insulin Degludec Impurity 15 (CAS CATO-C4X-215715)
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