4,5-Dihydro-6-methylpyridazin-3(2H)-one

Modify Date: 2025-08-20 20:41:14

4,5-Dihydro-6-methylpyridazin-3(2H)-one Structure
4,5-Dihydro-6-methylpyridazin-3(2H)-one structure
 Common Name 4,5-Dihydro-6-methylpyridazin-3(2H)-one
CAS Number 5157-08-4 Molecular Weight 112.130
Density 1.2±0.1 g/cm3 Boiling Point N/A
Molecular Formula C5H8N2O Melting Point 102-104 ºC
MSDS N/A Flash Point N/A

 Names

Name 4,5-Dihydro-6-methylpyridazin-3(2H)-one
Synonym More Synonyms

 Chemical & Physical Properties

Density 1.2±0.1 g/cm3
Melting Point 102-104 ºC
Molecular Formula C5H8N2O
Molecular Weight 112.130
Exact Mass 112.063660
PSA 41.46000
LogP -1.71
Index of Refraction 1.577

 Toxicological Information

CHEMICAL IDENTIFICATION

RTECS NUMBER :
UR6375000
CHEMICAL NAME :
3(2H)-Pyridazinone, 4,5-dihydro-6-methyl-
CAS REGISTRY NUMBER :
5157-08-4
LAST UPDATED :
197901
DATA ITEMS CITED :
1
MOLECULAR FORMULA :
C5-H8-N2-O
MOLECULAR WEIGHT :
112.15
WISWESSER LINE NOTATION :
T6NMV FUTJ F1

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intravenous
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
320 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
CSLNX* U.S. Army Armament Research & Development Command, Chemical Systems Laboratory, NIOSH Exchange Chemicals. (Aberdeen Proving Ground, MD 21010) Volume(issue)/page/year: NX#02409

 Safety Information

Hazard Codes Xn:Harmful;
Risk Phrases R20/21/22;R36/37/38
Safety Phrases S37/39-S26-S36/37/39-S22
RTECS UR6375000
HS Code 2933990090

 Synthetic Route

 Customs

HS Code 2933990090
Summary 2933990090. heterocyclic compounds with nitrogen hetero-atom(s) only. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

 Synonyms

6-methyl-4,5-dihydro-2H-pyridazin-3-one
6-METHYL-2,3,4,5-TETRAHYDROPYRIDAZIN-3-ONE
3(2H)-Pyridazinone, 4,5-dihydro-6-methyl-
4,5-Dihydro-6-methyl-3(2H)-pyridazinone
6-Methyl-4,5-dihydro-3-pyridazone
6-Methyl-4,5-dihydro-3(2H)-pyridazinone
6-Methyl-4,5-dihydropyridazin-3(2H)-one
dihydropyridazinone
MFCD00006455
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