1-(2-Chloroethyl)-5-(2,4-dichlorophenyl)-1H-pyrazole CAS 1710302-42-3
| CAS No. | 1710302-42-3 |
| Molecular Formula | C11H9Cl3N2 |
| Molecular Weight | 275.56 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 1-(2-Chloroethyl)-5-(2,4-dichlorophenyl)-1H-pyrazole meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
1-(2-Chloroethyl)-5-(2,4-dichlorophenyl)-1H-pyrazole (CAS 1710302-42-3), molecular formula C11H9Cl3N2 and molecular weight 275.56 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a nitrogen-containing heterocyclic scaffold, a nitrile group, chlorine substitution, 1-(2-Chloroethyl)-5-(2,4-dichlorophenyl)-1H-pyrazole is typically off-white to pale yellow low-melting solid. Its solid-state physicochemical attributes — including a molecular weight of 275.56 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C11H9Cl3N2 |
| Molecular Weight | 275.56 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1994 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Chloroethyl Standards
- N-(2-chloroethyl)-1,2-dihydronaphtho[2,1-b]furan-2-carboxamide (CAS 478078-36-3)
- 4-(2-Chloroethyl)-N,N-diethylbenzenesulfonamide (CAS 1018537-40-0)
- 2-(1-chloroethyl)-5-(3,4-dichlorophenyl)-1,3-oxazole (CAS 1094318-44-1)
- 2-(1-Chloroethyl)-5-(2,4-dichlorophenyl)-1,3-oxazole (CAS 1094382-55-4)
- 5-(1-Chloroethyl)-3-[3-(trifluoromethyl)phenyl]-1,2,4-oxadiazole (CAS 923753-68-8)
- 3-(2-Chloroethyl)-2-((2-chloroethyl)amino)-4-hydroxy-1,3,2-oxazaphosphinane 2-oxide (CAS 50892-10-9)
- 2-Chloroethyl 2-(4-chlorophenoxy)-2-methylpropanoate (CAS 52161-12-3)
- 2-(1-Chloroethyl)-5-(ethylsulfonyl)benzo[d]oxazole (CAS 1355224-73-5)
Recommended Standards
- 5-Bromo-1-benzothiophene-3-carbonyl chloride (CAS 850374-99-1)
- 6-Chloro-5-(difluoromethyl)-2-(trifluoromethyl)nicotinic acid (CAS 1804717-78-9)
- 5-Bromo-1-benzothiophene-2-carbonyl chloride (CAS 7312-14-3)
- 2-Chloro-6-(difluoromethyl)-4-(trifluoromethyl)nicotinic acid (CAS 1804717-96-1)
- 4-Bromo-N-ethyl-2-methylbenzamide (CAS 1146157-77-8)
- 1,2-Dimethylhexahydropyridazin-4-ol (CAS 132846-57-2)
- 1-Bromo-4,5-difluoro-2-methylbenzene (CAS 875664-38-3)
- Ethyl 2-(6-chloropyridin-3-yl)-2-oxoacetate (CAS 902837-55-2)
- 2-(3-Chlorophenyl)-4,5,6,7-tetrahydrooxazolo[4,5-c]pyridine (CAS 944903-54-2)
- 4-Bromo-2-fluoro-3-(4-methoxyphenyl)propiophenone (CAS 898776-10-8)
- 2-[(E)-2-({1-[3-chloro-5-(trifluoromethyl)pyridin-2-yl]-1H-pyrrol-2-yl}methylidene)hydrazin-1-yl]-3-(trifluoromethyl)quinoxaline (CAS 477873-15-7)
- 2-[(2E)-3-[(3,5-Dichlorophenyl)amino]-1-(dimethylamino)prop-2-en-1-ylidene]propanedinitrile (CAS 339102-37-3)
- ethyl 4,4-difluoropyrrolidine-3-carboxylate hydrochloride (CAS 1780567-10-3)
- Semaglutide Impurity 18 (CAS 1671100-14-3)
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