5-chloro-1,3,4-trimethyl-1H-pyrazole CAS 1195585-81-9
| CAS No. | 1195585-81-9 |
| Molecular Formula | C6H9ClN2 |
| Molecular Weight | 144.60 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 5-chloro-1,3,4-trimethyl-1H-pyrazole is closely related to a nitrile group, chlorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
CATO supplies 5-chloro-1,3,4-trimethyl-1H-pyrazole (CAS 1195585-81-9), a certified reference material (molecular formula C6H9ClN2, MW 144.60 g/mol) for analytical method development and quality control.
5-chloro-1,3,4-trimethyl-1H-pyrazole (C6H9ClN2) contains a nitrile group, chlorine substitution. Halogen substitution raises its density and boiling point; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C6H9ClN2 |
| Molecular Weight | 144.60 g/mol |
| 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) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1989 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related chloro Standards
- 3-Chloro-1,4,5-trimethyl-1H-pyrazole (CAS 1036991-59-9)
- 2-Chloro-1-isopropyl-1h-imidazole (CAS 1053655-72-3)
- 4-Chloro-1-ethyl-3-methyl-1H-pyrazole (CAS 1172461-39-0)
- 4-Chloro-1-ethyl-5-methyl-1H-pyrazole (CAS 1172915-66-0)
- 6-chloro-6-methylbicyclo[3.1.0]hexan-2-one (CAS 117341-93-2)
- 3-Chloro-1-ethyl-5-methyl-1H-pyrazole (CAS 1195637-10-5)
- 4-Chloro-1-propyl-1H-pyrazole (CAS 1204901-63-2)
- 4-Chloro-1-isopropyl-1H-pyrazole (CAS 1205921-77-2)
Recommended Standards
- 3-(Chloromethyl)-1-ethyl-1H-pyrazole (CAS 1172973-66-8)
- 5-(Chloromethyl)-2-ethyl-1H-imidazole (CAS 1263281-83-9)
- 2,2-dimethylpent-4-ynoyl chloride (CAS 131752-83-5)
- 1-(2-Chloroethyl)-4-methyl-1H-pyrazole (CAS 1046861-53-3)
- N-butyl-3,4,5,6-tetrahydropyridin-2-amine (CAS 1521631-15-1)
- Tert-butyl 5-methyloctahydro-1H-pyrrolo[3,2-c]pyridine-1-carboxylate (CAS 2306269-49-6)
- 4-Methoxy-3-(4-methylpiperazin-1-yl)aniline (CAS 148546-78-5)
- 2-((4-Acetamidocyclohexyl)(methyl)amino)acetic acid (CAS 1353953-33-9)
- 5-Methyl-2-piperidin-4-yl-1,3-benzoxazole (CAS 199292-77-8)
- Ethyl 7-(difluoromethyl)-5-(p-tolyl)pyrazolo[1,5-a]pyrimidine-3-carboxylate (CAS 438218-13-4)
- 6-Fluoro-1H-pyrrolo[2,3-b]pyridine-3-carbaldehyde (CAS 1190314-77-2)
- 5-Chloro-3-methylpyrazine-2-carbaldehyde (CAS 1393533-77-1)
- (4Z)-2-[(4-Chlorophenyl)methoxy]-4-({[3-(trifluoromethyl)phenyl]amino}methylidene)-1,2,3,4-tetrahydroisoquinoline-1,3-dione (CAS 338419-54-8)
- Semaglutide impurity 194 (CAS CATO-C4X-2226194)
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