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Basic Information
CAS No.: 129-81-7
Name: IODOANTIPYRINE
Article Data: 11
Molecular Structure:
Molecular Structure of 129-81-7 (IODOANTIPYRINE)
Formula: C11H11 I N2 O
Molecular Weight: 314.126
Synonyms: Antipyrine,4-iodo- (6CI,7CI,8CI); 4-Iodo-2,3-dimethyl-1-phenylpyrazol-5-one;4-Iodo-2,3-dimethyl-1-phenylpyrazolone; 4-Iodoantipyrine; Antipyrine iodide;Arthripur; Iodantipirin; Iodoantipyrine; Iodophenazone; Iodopyrine;Jodantipyrin; Jodopyrin
Density: 1.77g/cm3
Melting Point: 161-163°C
Boiling Point: 325.9°Cat760mmHg
Flash Point: 150.9°C
Hazard Symbols: Moderately toxic by ingestion.
Risk Codes: 36/37/38
Safety: Moderately toxic by ingestion and intraperitoneal routes. When heated to decomposition it emits toxic vapors of NOx and I−.
PSA: 26.93000
LogP: 2.08900
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Chemistry

IUPAC Name: 4-Iodo-1,5-dimethyl-2-phenylpyrazol-3-one
Product Name: Iodoantipyrine
The MF of 4-Iodo-1,5-dimethyl-2-phenylpyrazol-3-one (CAS NO.129-81-7) is C11H11IN2O.

                                          
The MW of 4-Iodo-1,5-dimethyl-2-phenylpyrazol-3-one (CAS NO.129-81-7) is 314.12.
Synonyms of 4-Iodo-1,5-dimethyl-2-phenylpyrazol-3-one (CAS NO.129-81-7): 1-Phenyl-2,3-dimethyl-4-iodopyrazolone ; 1,2-Dihydro-4-iodo-1,5-dimethyl-2-phenyl-2H-pyrazol-3-one ; 1,5-Dimethyl-4-iodo-2-phenyl-1,2-dihydro-pyrazol-3-one ; 2,3-Dimethyl-4-iodo-1-phenyl-3-pyrazolin-5-one ; 3H-Pyrazol-3-one, 1,2-dihydro-4-iodo-(sup 131)I-1,5-dimethyl-2-phenyl ; 3H-Pyrazol-3-one, 1,2-dihydro-4-iodo-1,5-dimethyl-2-phenyl-
Index of Refraction: 1.697 
EINECS: 204-966-6
Density: 1.77 g/ml 
Flash Point: 150.9 °C
Boiling Point: 325.9 °C
Melting Point: 155-157 °C
Sensitive: Light Sensitive
BRN: 181670

Toxicity Data With Reference

1.    

orl-rat LD50:2060 mg/kg

     EKFAE9    Eksperimentalnaya i Klinicheskaya Farmakologiya. Experimental and Clinical Pharmacology. 61 (2)(1998),57.
2.    

ipr-rat LD50:1720 mg/kg

     EKFAE9    Eksperimentalnaya i Klinicheskaya Farmakologiya. Experimental and Clinical Pharmacology. 61 (2)(1998),57.
3.    

orl-mus LD50:1600 mg/kg

     EKFAE9    Eksperimentalnaya i Klinicheskaya Farmakologiya. Experimental and Clinical Pharmacology. 61 (2)(1998),57.

Safety Profile

Moderately toxic by ingestion and intraperitoneal routes. When heated to decomposition it emits toxic vapors of NOx and I−.Safety information of 4-Iodo-1,5-dimethyl-2-phenylpyrazol-3-one (CAS NO.129-81-7):
Hazard Codes  IrritantXi
Risk Statements 
36/37/38 Irritating to eyes, respiratory system and skin
Safety Statements 
26 In case of contact with eyes, rinse immediately with plenty of water and seek medical advice
36 Wear suitable protective clothing
RTECS  UQ9080000
Hazard Note  Irritant