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- Name 4-Chloropyrazole
- EINECSN/A
- CAS No. 15878-00-9
- Density1.405
- PSA28.68000
- LogP1.06310
- SolubilityN/A
- Melting Point75-76 ºC
- FormulaC3H3 Cl N2
- Boiling Point220 °C at 760 mmHg
- Molecular Weight102.523
- Flash Point99 ºC
- Transport InformationN/A
- AppearanceWhite to light yellow crystalline powder
- Safety26-36/37/39
- Risk Codes36/37/38
- Molecular Structure
- Hazard Symbols
- Synonyms
4-Chloropyrazole Chemical Properties
IUPAC Name: 4-Chloro-1H-pyrazole
Synonyms of 1H-Pyrazole, 4-chloro- (CAS NO.15878-00-9): 4-Chloropyrazole ; 5-23-04-00164 (Beilstein Handbook Reference) ; BRN 0106355 ; L-21842 ; 1H-Pyrazole, 4-chloro- (9CI) ; Pyrazole, 4-chloro-
CAS NO: 15878-00-9
Classification Code: Drug / Therapeutic Agent
Molecular Formula of 1H-Pyrazole, 4-chloro- (CAS NO.15878-00-9): C3H3ClN2
Molecular Weight: 102.5223
Molecular Structure:
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Melting point: 75-76 ºC
H bond acceptors: 2
H bond donors: 1
Polar Surface Area: 17.82 Å2
Index of Refraction: 1.562
Molar Refractivity: 23.67 cm3
Molar Volume: 72.9 cm3
Surface Tension: 53.1 dyne/cm
Density of 1H-Pyrazole, 4-chloro- (CAS NO.15878-00-9): 1.405 g/cm3
Flash Point: 98.8 °C
Enthalpy of Vaporization: 43.78 kJ/mol
Boiling Point: 220 °C at 760 mmHg
Vapour Pressure: 0.171 mmHg at 25°C
4-Chloropyrazole Toxicity Data With Reference
| Organism | Test Type | Route | Reported Dose (Normalized Dose) | Effect | Source |
|---|---|---|---|---|---|
| rat | LD50 | oral | 527mg/kg (527mg/kg) | BEHAVIORAL: ANTICONVULSANT BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY) | Archives Internationales de Pharmacodynamie et de Therapie. Vol. 121, Pg. 443, 1959. |
4-Chloropyrazole Safety Profile
Hazard Codes: 
Xi
Risk Statements: 36/37/38
R36/37/38: Irritating to eyes, respiratory system and skin.
Safety Statements: 26-36/37/39
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S36/37/39: Wear suitable protective clothing, gloves and eye/face protection.
HazardClass: IRRITANT
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