2,5-Dibromo-3-chloropyrazine CAS 21943-16-8
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 21943-16-8 |
| Molecular Formula | C4HBr2ClN2 |
| Molecular Weight | 272.33 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
2,5-Dibromo-3-chloropyrazine (CAS 21943-16-8) is a high-purity pharmaceutical standards reference standard from CATO, an ISO 17034 accredited reference material producer. Molecular formula: C4HBr2ClN2. Molecular weight: 272.33 g/mol. Each batch is supplied with a Certificate of Analysis (COA).
Physical & Chemical Properties
| Molecular Formula | C4HBr2ClN2 |
| Molecular Weight | 272.33 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1963 |
| Halogen Content | Cl/Br-containing |
| Nitrogen Atoms | 2 |
Related Dibromo Standards
- 3,5-Dibromo-2-chloropyrazine (CAS 1082843-70-6)
- 2,4-Dibromo-5-chloropyrimidine (CAS 1266480-96-9)
- 4,6-Dibromo-5-chloropyrimidine (CAS 2229563-91-9)
- α,α′-Dibromo-p-xylene-d8 (CAS 74903-77-8)
- 2,4-dibromo-2,4-dimethyl-3-pentanone (CAS 17346-16-6)
- 1,7-Dibromo-heptan-4-one (CAS 89774-18-5)
- 2,5-Dibromo-3-methoxythiophene (CAS 148078-36-8)
- 3,5-dibromo-2-methoxythiophene (CAS 77133-30-3)
Recommended Standards
- 2-(Benzylthio)-5-methyl-[1,2,4]triazolo[1,5-a]pyrimidin-7(1H)-one (CAS 51646-33-4)
- 2-Isonicotinoyl-N-phenylhydrazine-1-carbothioamide (CAS 6954-50-3)
- 1-(4-(8-(Methylamino)imidazo[1,2-a]pyrazin-3-yl)thiophen-2-yl)ethanone (CAS 825630-58-8)
- 2-Bromo-1-(2-pyridyl)ethanone (CAS 40086-66-6)
- 2-Fluoropyridine-3-boronic Acid Pinacol Ester (CAS 452972-14-4)
- 2-Fluoro-9H-xanthen-9-one (CAS 2839-49-8)
- Ethyl 2-(benzylamino)-5-bromonicotinate (CAS 1186404-92-1)
- (S)-2',3',4',9'-Tetrahydrospiro[cyclobutane-1,1'-pyrido[3,4-b]indole]-3'-carboxylic acid (CAS 1956436-79-5)
- N-(7-Butyl-6,8-dioxo-2,3,4,6,7,8-hexahydro-1H-pyrimido[1,6-a]pyrimidin-9-yl)benzamide (CAS 524944-74-9)
- Liraglutide Impurity 21 TFA Salt (CAS CATO-C4X-199221)
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 13829788188 / jacky.chen@cato-chem.com