-
Name
4,5-Dichloro-3(2H)-pyridazinone
- EINECS
- CAS No. 932-22-9
- Article Data29
- CAS DataBase
- Density 1.76 g/cm3
- Solubility
- Melting Point 204-206 °C(lit.)
- Formula C4H2Cl2N2O
- Boiling Point 339.2 °C at 760 mmHg
- Molecular Weight 164.979
- Flash Point 159 °C
- Transport Information
- Appearance Beige crystalline solid
- Safety 26-36-37/39
- Risk Codes 36/37/38
-
Molecular Structure
-
Hazard Symbols
Xi
- Synonyms 3-Hydroxy-4,5-dichloropyridazine;4,5-Dichloro-2H-pyridazin-3-one;4,5-Dichloro-3(2H)-pyridazone;4,5-Dichloro-3-hydroxypyridazine;4,5-Dichloro-6-oxo-1H-pyridazine;4,5-Dichloro-6-pyridazone;NSC 16127;NSC17182;NSC 240022;
- PSA 45.75000
- LogP 1.07670
4,5-Dichloro-3(2H)-pyridazinone Chemical Properties
Molecular Structure of 3(2H)-Pyridazinone, 4,5-dichloro- (CAS NO.932-22-9):
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IUPAC Name: 4,5-dichloro-1H-pyridazin-6-one
Empirical Formula: C4H2Cl2N2O
Molecular Weight: 164.9775
H bond acceptors: 3
H bond donors: 1
Freely Rotating Bonds: 0
Polar Surface Area: 32.67Å2
Index of Refraction: 1.661
Molar Refractivity: 34.58 cm3
Molar Volume: 93.4 cm3
Surface Tension: 56.9 dyne/cm
Density: 1.76 g/cm3
Flash Point: 159 °C
Enthalpy of Vaporization: 60.57 kJ/mol
Boiling Point: 339.2 °C at 760 mmHg
Vapour Pressure: 4.74E-05 mmHg at 25°C
Melting point: 204-206 °C(lit.)
BRN: 120959
InChI
InChI=1/C4H2Cl2N2O/c5-2-1-7-8-4(9)3(2)6/h1H,(H,8,9)
Smiles
c1(c([nH]ncc1Cl)=O)Cl
Product Categories: Pyridazine series; Piperazine series; Bases & Related Reagents; Heterocycles; Nucleotides
4,5-Dichloro-3(2H)-pyridazinone Toxicity Data With Reference
| Organism | Test Type | Route | Reported Dose (Normalized Dose) | Effect | Source |
|---|---|---|---|---|---|
| mouse | LD | intraperitoneal | > 300mg/kg (300mg/kg) | Farmaco, Edizione Scientifica. Vol. 40, Pg. 921, 1985. | |
| mouse | LD | oral | > 1gm/kg (1000mg/kg) | Farmaco, Edizione Scientifica. Vol. 40, Pg. 921, 1985. |
4,5-Dichloro-3(2H)-pyridazinone 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:Wear suitable protective clothing.
S37/39:Wear suitable gloves and eye/face protection.
WGK Germany: 3
RTECS: UR6182000
4,5-Dichloro-3(2H)-pyridazinone Specification
3(2H)-Pyridazinone, 4,5-dichloro- , with CAS number of 932-22-9, can be called 3-Hydroxy-4,5-dichloropyridazine ; 4,5-Dichloro-2H-pyridazin-3-one ; 4,5-Dichloro-3(2H)-pyridazinone ; 4,5-Dichloro-3(2H)-pyridazone ; 4,5-Dichloro-6-pyridazone . It is a beige crystalline solid, used as a new labelled substituted pyridazinone with tuberculostatic action.
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