2,3,5-Trichloropyrazine CAS 873-40-5
| CAS No. | 873-40-5 |
| Molecular Formula | C4HCl3N2 |
| Molecular Weight | 183.42 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO supplies 2,3,5-Trichloropyrazine (CAS 873-40-5), a certified reference material (molecular formula C4HCl3N2, MW 183.42 g/mol) for analytical method development and quality control.
Structurally, 2,3,5-Trichloropyrazine (C4HCl3N2) contains a nitrile group, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 4.0, corresponding to approximately 4 ring(s) or double-bond equivalent(s). With a molecular weight of 183.42 g/mol, it falls into the medium-molecular-weight range. 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).
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C4HCl3N2 |
| Molecular Weight | 183.42 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.) | 1957 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Trichloropyrazine Standards
Recommended Standards
- 4,5,6-Trichloropyrimidine (CAS 1780-27-4)
- 3,4,6-Trichloropyridazine (CAS 6082-66-2)
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- 2,4,6-Trichloropyrimidine (CAS 3764-01-0)
- Octahydropyrrolo[3,4-b][1,4]oxazine hydrochloride (CAS 724460-95-1)
- CAS CATO-LCPD103068-HE (CAS CATO-LCPD103068-HE)
- 1245914-35-5 3-Bromo-5-fluoro-2-(trifluoromethyl)pyridine (CAS 1245914-35-5)
- Methyl 4-ethoxy-3-iodobenzoate (CAS 1131588-13-0)
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- 2-Chloro-4-fluoronicotinonitrile (CAS 1054552-27-0)
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Why CATO?
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