Crisaborole Impurity 45 CAS 2973-80-0
Purity >95%In StockPharmacopoeial Impurity Standards
| CAS No. | 2973-80-0 |
| Molecular Formula | C7H5BrO2 |
| Molecular Weight | 201.02 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Crisaborole Impurity 45 (CAS 2973-80-0) reference standard, produced by CATO (ISO 17034 / CNAS / ANAB accredited). Molecular formula: C7H5BrO2. Molecular weight: 201.02 g/mol. Trusted by 10,000+ laboratories worldwide for pharmaceutical analysis and QC.
Physical & Chemical Properties
| Molecular Formula | C7H5BrO2 |
| Molecular Weight | 201.02 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| Purity | >95% |
| 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 1 (CAS 20035-32-9)
- Crisaborole Impurity 2 (CAS 196081-71-7)
- Crisaborole Impurity 48 (CAS 22532-61-2)
- Crisaborole Impurity 18 (CAS 2737-20-4)
- Crisaborole Impurity 41 (CAS 2737-19-1)
- Crisaborole Impurity 42 (CAS 1260761-47-4)
- Crisaborole Impurity 6 (CAS 28547-28-6)
- Crisaborole Impurity 43 (CAS 58380-11-3)
Recommended Standards
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- (S)-2-(3-Pyrrolidinyl)-2-propanol Hydrochloride (CAS 1273577-45-9)
- 2881-63-2 3-(4-Chlorophenyl)-3-oxopropanoic acid ethyl ester Ethyl (4-chlorobenzoyl)acetate Ethyl 3-(4-chlorophenyl)-3-oxopropanoate NSC 406743 (CAS 2881-63-2)
- (6-(tertButoxycarbonyl)-5,6,7,8-tetrahydro-1,6-naphthyridin-3-yl)boronic acid (CAS 2408429-82-1)
- 2-((3,4-Dimethylphenyl)sulfonyl)acetonitrile (CAS 1008108-48-2)
- Semaglutide impurity 270 (CAS CATO-C4X-2226270)
Why CATO?
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