Crisaborole Impurity 18 CAS 2737-20-4
Purity 97%+In StockPharmacopoeial Impurity Standards
| CAS No. | 2737-20-4 |
| Molecular Formula | C7H7BrO2 |
| Molecular Weight | 203.03 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Order Crisaborole Impurity 18 (CAS 2737-20-4) pharmacopoeial impurity standards reference standard from CATO: ISO 17034 accredited producer, 130,000+ catalog items in stock. Molecular formula: C7H7BrO2. Molecular weight: 203.03 g/mol. COA included with every batch.
Physical & Chemical Properties
| Molecular Formula | C7H7BrO2 |
| Molecular Weight | 203.03 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| 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) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Halogen Content | Br-containing |
Related Crisaborole Standards
- Crisaborole Impurity 41 (CAS 2737-19-1)
- Crisaborole Impurity 42 (CAS 1260761-47-4)
- Crisaborole Impurity 1 (CAS 20035-32-9)
- Crisaborole Impurity 2 (CAS 196081-71-7)
- Crisaborole Impurity 45 (CAS 2973-80-0)
- Crisaborole Impurity 48 (CAS 22532-61-2)
- Crisaborole Impurity 6 (CAS 28547-28-6)
- Crisaborole Impurity 43 (CAS 58380-11-3)
Recommended Standards
- Palbociclib Impurity 172 (CAS CATO-C4X-1125172)
- 7-chloro-5-(chloromethyl)-1H-pyrazolo[4,3-d]pyrimidine (CAS 2932453-23-9)
- 7-Chloro-5-(chloromethyl)-[1,2,4]triazolo[1,5-a]pyrimidine (CAS 63882-72-4)
- Palbociclib Impurity 48 (CAS 1415560-29-0)
- Baclofen Impurity 48 (CAS CATO-C4X-101248)
- 2-(3-Chlorophenyl)quinoline-8-carboxamide (CAS 655222-56-3)
- 2-(4-EThylbenzylidene)-6-hydroxybenzofuran-3(2h)-one (CAS 620545-94-0)
- Mesalazine EP Impurity D (CAS 99-05-8)
- 4-{[(4-Methoxybenzyl)oxy]methyl}piperidinehydrochloride (CAS 1219949-43-5)
- Tirzepatide Impurity 61 (CAS CATO-C4X-324061)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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