Crisaborole Impurity 5 CAS 3111-51-1
Purity 97%+In StockPharmacopoeial Impurity Standards
| CAS No. | 3111-51-1 |
| Molecular Formula | C7H4Br2O2 |
| Molecular Weight | 279.91 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Crisaborole Impurity 5 (CAS 3111-51-1) reference standard, produced by CATO (ISO 17034 / CNAS / ANAB accredited). Molecular formula: C7H4Br2O2. Molecular weight: 279.91 g/mol. Trusted by 10,000+ laboratories worldwide for pharmaceutical analysis and QC.
Physical & Chemical Properties
| Molecular Formula | C7H4Br2O2 |
| Molecular Weight | 279.91 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at room temperature, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Halogen Content | Br-containing |
Related Crisaborole Standards
- Crisaborole Impurity 40 (CAS 2737-21-5)
- Crisaborole Impurity 30 (CAS 2988644-41-1)
- Crisaborole lmpurity 89 (CAS 1187187-13-8)
- Crisaborole lmpurity 77 (CAS CATO-C4X-202177)
- Crisaborole impurity 125 (CAS CATO-C4X-2021125)
- Crisaborole lmpurity 94 (CAS 947162-20-1)
- Crisaborole lmpurity 96 (CAS 526218-72-4)
- Crisaborole Impurity 16 (CAS 906673-43-6)
Recommended Standards
- 3,5-Dibromobenzoic acid (CAS 618-58-6)
- 3,5-Dibromo-4-hydroxybenzaldehyde (CAS 2973-77-5)
- 5-Chloro-2-fluoro-4-methoxy-6-(trichloromethyl)pyrimidine (CAS 84737-34-8)
- Pyridoxine EP Impurity A (CAS 5196-20-3)
- Chlorphenamine Impurity 73 (CAS CATO-C4X-118873)
- Moctamide (CAS 29619-86-1)
- (R)-2-(5-Oxopyrrolidin-2-yl)acetic acid (CAS 65137-60-2)
- tert-Butyl (1-(2-amino-1-(4-(trifluoromethyl)phenyl)ethyl)pyrrolidin-3-yl)carbamate (CAS 886365-38-4)
- 4-Isopropyl-N-methylaniline (CAS 6950-79-4)
- Tirzepatide Impurity 49 (CAS CATO-C4X-324049)
Why CATO?
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