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ChemicalBook >> CAS DataBase List >>4,5-DICHLORO-2-METHYLPYRIDAZIN-3-ONE

4,5-DICHLORO-2-METHYLPYRIDAZIN-3-ONE

CAS No.
933-76-6
Chemical Name:
4,5-DICHLORO-2-METHYLPYRIDAZIN-3-ONE
Synonyms
AKOS B029262;Emorfazone int;4,5-DICHLORO-2-METHYLPYRIDAZIN-3-ONE;2-Methyl-4,5-dichloro-3-pyridazinone;4,5-dichloro-2-methylpyridazine-3-one;5-Dichloro-2-Methyl-3(2H)-pyridazinone;5-Dichloro-2-methylpyridazin-3(2H)-one;4,5-dichloro-2-methyl-3(2h)-pyridazinon;4,5-DICHLORO-2-METHYLPYRIDAZIN-3-ONE, 9&;4,5-DICHLORO-2-METHYL-3(2H)-PYRIDAZINONE
CBNumber:
CB8728203
Molecular Formula:
C5H4Cl2N2O
Molecular Weight:
179
MDL Number:
MFCD00051686
MOL File:
933-76-6.mol
MSDS File:
SDS
Last updated:2025-07-24 18:13:47

4,5-DICHLORO-2-METHYLPYRIDAZIN-3-ONE Properties

Melting point 87-91 °C(lit.)
Boiling point 197.2±50.0 °C(Predicted)
Density 1.55±0.1 g/cm3(Predicted)
storage temp. under inert gas (nitrogen or Argon) at 2-8°C
solubility soluble in Ethanol
form powder to crystal
pka -3.57±0.20(Predicted)
color White to Orange to Green
InChI InChI=1S/C5H4Cl2N2O/c1-9-5(10)4(7)3(6)2-8-9/h2H,1H3
InChIKey ACKBTCUMGAHRIE-UHFFFAOYSA-N
SMILES C1(=O)N(C)N=CC(Cl)=C1Cl
UNSPSC Code 12352100
NACRES NA.22

SAFETY

Risk and Safety Statements

Symbol(GHS)  GHS hazard pictograms
GHS06
Signal word  Danger
Hazard statements  H301-H315-H317-H319-H335
Precautionary statements  P280-P301+P310+P330-P302+P352-P305+P351+P338
Hazard Codes  Xn
Risk Statements  22-36/37/38-43
Safety Statements  26-36
RIDADR  UN 2811 6.1/PG 3
WGK Germany  3
RTECS  UR6188000
HS Code  29339980
NFPA 704
1
2 0

4,5-DICHLORO-2-METHYLPYRIDAZIN-3-ONE price More Price(34)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 597716 4,5-Dichloro-2-methyl-3(2H)-pyridazinone 97% 933-76-6 5g $149 2023-06-20 Buy
TCI Chemical D5324 4,5-Dichloro-2-methyl-3(2H)-pyridazinone >98.0%(GC) 933-76-6 1g $23 2025-07-31 Buy
TCI Chemical D5324 4,5-Dichloro-2-methyl-3(2H)-pyridazinone >98.0%(GC) 933-76-6 5g $90 2025-07-31 Buy
TRC M299780 2-Methyl-4,5-dichloro-3-pyridazinone 933-76-6 10g $115 2021-12-16 Buy
AK Scientific J94295 4,5-Dichloro-2-methyl-3(2H)-pyridazinone 933-76-6 1g $12 2021-12-16 Buy
Product number Packaging Price Buy
597716 5g $149 Buy
D5324 1g $23 Buy
D5324 5g $90 Buy
M299780 10g $115 Buy
J94295 1g $12 Buy

4,5-DICHLORO-2-METHYLPYRIDAZIN-3-ONE Chemical Properties,Uses,Production

Chemical Properties

Off-white to yellow low crystalline powder

Uses

4,5-Dichloro-2-methyl-3(2H)-pyridazinone can be used in the synthesis of 4-amino-3(2H)-pyridazinones and 5-amino-3(2H)-pyridazinones via reaction with N-benzylaminoethanol.

Definition

ChEBI: 4,5-Dichloro-2-methyl-3(2H)-pyridazinone is a pyridazinone.

Synthesis

4,5-Dichloro-3(2H)-pyridazinone

932-22-9

Iodomethane

74-88-4

4,5-DICHLORO-2-METHYLPYRIDAZIN-3-ONE

933-76-6

Step 1: A round bottom flask was charged with 4,5-dichloropyridazin-3(2H)-one (10.0 g, 60.6 mmol), potassium carbonate (16.8 g, 121.2 mmol), iodomethane (4.0 mL, 64.3 mmol) and acetonitrile (80 mL). The reaction mixture was heated to reflux for 12 hours and then cooled to room temperature. After completion of the reaction, the mixture was filtered and the filtrate was concentrated. The residue was purified by column chromatography (dichloromethane as eluent) to afford 4,5-dichloro-2-methylpyridazin-3-one 8.21 g (76% yield). The product was confirmed by 1H NMR (400 MHz, DMSO-d6): δ 8.18 (s, 1H), 3.70 (s, 3H); mass spectrum (m/z) = 179 ([M+H]+).

References

[1] Patent: WO2009/142732, 2009, A2. Location in patent: Page/Page column 61-62
[2] Patent: WO2011/15629, 2011, A1. Location in patent: Page/Page column 46; 47
[3] Journal of Heterocyclic Chemistry, 1996, vol. 33, # 6, p. 1579 - 1582
[4] Patent: WO2013/50421, 2013, A1. Location in patent: Page/Page column 37
[5] Journal of the Korean Chemical Society, 2014, vol. 58, # 1, p. 140 - 144

4,5-DICHLORO-2-METHYLPYRIDAZIN-3-ONE Preparation Products And Raw materials

Global( 138)Suppliers
Supplier Tel Email Country ProdList Advantage
Capot Chemical Co.,Ltd. 		+8613336195806 sales@capot.com China 29731 60
ATK CHEMICAL COMPANY LIMITED 		+undefined-21-51877795 ivan@atkchemical.com China 33024 60
career henan chemical co 		+86-0371-86658258 +8613203830695 sales@coreychem.com China 29855 58
Hubei xin bonus chemical co. LTD 		86-13657291602 linda@hubeijusheng.com CHINA 22963 58
CONIER CHEM AND PHARMA LIMITED 		+8618523575427 sales@conier.com China 49730 58
Shaanxi Dideu Medichem Co. Ltd 		+86-029-81138252 +86-173 9270 1263 1057@dideu.com China 3944 58
Antai Fine Chemical Technology Co.,Limited 		18503026267 info@antaichem.com CHINA 9636 58
Guangzhou Yuheng Pharmaceutical Technology Co., Ltd 		+8613580539051 joe@yuhengpharm.com CHINA 21142 58
Shanghai Rlavie Technology Co ltd 		+86-021-67759270 +8617717059219 sales@rlavie.com China 1030 58
Hefei TNJ Chemical Industry Co.,Ltd. 		+86-0551-65418671 +8618949823763 sales@tnjchem.com China 34563 58

View Lastest Price from 4,5-DICHLORO-2-METHYLPYRIDAZIN-3-ONE manufacturers

Image Update time Product Price Min. Order Purity Supply Ability Manufacturer
4,5-Dichloro-2-Methylpyridazin-3-one pictures 2022-01-04 4,5-Dichloro-2-Methylpyridazin-3-one
933-76-6
 US $0.00-0.00 / KG 1g 98%minHPLC 100kgs/month Shanghai Rlavie Technology Co ltd
4,5-DICHLORO-2-METHYLPYRIDAZIN-3-ONE pictures 2021-11-03 4,5-DICHLORO-2-METHYLPYRIDAZIN-3-ONE
933-76-6
 US $1.10 / g 1g 99.00% 100 Tons Min Dideu Industries Group Limited
4,5-Dichloro-2-Methylpyridazin-3-one pictures 2020-04-30 4,5-Dichloro-2-Methylpyridazin-3-one
933-76-6
 US $1.00 / KG 1KG 99% 20T Shaanxi Dideu Medichem Co. Ltd

4,5-DICHLORO-2-METHYLPYRIDAZIN-3-ONE Spectrum

4,5-dichloro-2-methyl-3(2h)-pyridazinon 4,5-DICHLORO-2-METHYLPYRIDAZIN-3[2H]-ONE 4,5-DICHLORO-2-METHYLPYRIDAZIN-3-ONE 4,5-DICHLORO-2-METHYLPYRIDAZINE-3(2H)-ONE 4,5-DICHLORO-2-METHYL-2,3-DIHYDROPYRIDAZIN-3-ONE 4,5-DICHLORO-2-METHYL-2H-PYRIDAZIN-3-ONE 4,5-DICHLORO-2-METHYL-3(2H)-PYRIDAZINONE AKOS B029262 4,5-DICHLORO-2-METHYLPYRIDAZIN-3-ONE, 9& 4,5-DICHLORO-2-METHYLPYRIDAZIN-3[2H]-ONE 98% 4,5-Dichloro-2-methylpyridazin-32Hü-one, 98% 4,5-Dichloro-2-methyl-3(2H)-pyridazinone,97% 5-Dichloro-2-Methyl-3(2H)-pyridazinone CCM, 4,5-Dichloro-2,3-dihydro-2-methylpyridazin-3-one 4,5-Dichloro-2,3-dihydro-2-methyl-3-oxopyridazine, 4,5-Dichloro-2,3-dihydro-2-methyl-3-oxo-1,2-diazine Emorfazone int 2-Methyl-4,5-dichloro-3-pyridazinone 4,5-dichloro-2-methylpyridazine-3-one 3(2H)-Pyridazinone, 4,5-dichloro-2-methyl- 4,5-DICHLORO-2-METHYLPYRIDAZIN-3-ONE ISO 9001：2015 REACH 5-Dichloro-2-methylpyridazin-3(2H)-one 4,5-Dichloro-2-methyl-3(2H)-pyridazinone 933-76-6 933-76-3 Building Blocks Pyridazines Halogenated Heterocycles Heterocyclic Building Blocks Building Blocks Chemical Synthesis Halogenated Heterocycles Heterocyclic Building Blocks Pyridazines Halides Pyrazines, Pyrimidines & Pyridazines Pyrazines, Pyrimidines & Pyridazines