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

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

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

TDS File:: TDS

Last updated:2026-04-24 14:58:24

Product description	Number	Pack Size	Price
4,5-Dichloro-2-methyl-3(2H)-pyridazinone 97%	597716	5g	$149
4,5-Dichloro-2-methyl-3(2H)-pyridazinone >98.0%(GC)	D5324	1g	$20
4,5-Dichloro-2-methyl-3(2H)-pyridazinone >98.0%(GC)	D5324	5g	$80
2-Methyl-4,5-dichloro-3-pyridazinone	M299780	10g	$115
4,5-Dichloro-2-methylpyridazin-3(2H)-one	4H17-5-Y1	5G	$88
More product size

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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)

GHS06

Signal word

Danger

Hazard statements

H301-H315-H317-H319-H335

Precautionary statements

P280-P301+P310+P330-P302+P352-P305+P351+P338

target organs

Respiratory system

PPE

dust mask type N95 (US), Eyeshields, Faceshields, Gloves

Hazard Codes

Risk Statements

22-36/37/38-43

Safety Statements

26-36

RIDADR

UN 2811 6.1/PG 3

WGK Germany

RTECS

UR6188000

HazardClass

6.1

HS Code

29339980

Storage Class

6.1C - Combustible acute toxic Cat.3
toxic compounds or compounds which causing chronic effects

Hazard Classifications

Acute Tox. 3 Oral
Eye Irrit. 2
Skin Irrit. 2
Skin Sens. 1
STOT SE 3

Limited Quantities

5.0 L (1.3 gallons) (liquid) or 5.0 kg (11 lbs) (solid)

Excepted Quantities

Max Inner Pack (30g or 30ml) and Max Outer Pack (1Kg or 1L)

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	$20	2026-04-30	Buy
TCI Chemical	D5324	4,5-Dichloro-2-methyl-3(2H)-pyridazinone >98.0%(GC)	933-76-6	5g	$80	2026-04-30	Buy
TRC	M299780	2-Methyl-4,5-dichloro-3-pyridazinone	933-76-6	10g	$115	2021-12-16	Buy
SynQuest Laboratories	4H17-5-Y1	4,5-Dichloro-2-methylpyridazin-3(2H)-one	933-76-6	5G	$88	2021-12-16	Buy

Product number	Packaging	Price	Buy
597716	5g	$149	Buy
D5324	1g	$20	Buy
D5324	5g	$80	Buy
M299780	10g	$115	Buy
4H17-5-Y1	5G	$88	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

932-22-9

74-88-4

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

Raw materials

Mucochloric acid 4,5-Dichloro-3(2H)-pyridazinone 3,4-dichloro-5-hydroxyfuran-2(5H)-one Iodomethane Methylhydrazine

Acetonitrile Potassium carbonate

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Preparation Products

5-Iodo-2-Methylpyridazin-3(2h)-one

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

Global( 136)Suppliers

Supplier	Tel	Email	Country	ProdList	Advantage
Capot Chemical Co.,Ltd.	+86-（0）57185586718; +8613336195806	sales@capot.com	China	29640	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	29819	58
CONIER CHEM AND PHARMA LIMITED	+8618523575427	sales@conier.com	China	49977	58
Shaanxi Dideu Medichem Co. Ltd	+86-029-81138252 +86-173 9270 1263	1057@dideu.com	China	4000	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
Hefei Hirisun Pharmatech Co., Ltd	+8615056975894	shawn@hirisunpharm.com	CHINA	9911	58

Supplier	Advantage
Capot Chemical Co.,Ltd.	60
ATK CHEMICAL COMPANY LIMITED	60
career henan chemical co	58
CONIER CHEM AND PHARMA LIMITED	58
Shaanxi Dideu Medichem Co. Ltd	58
Antai Fine Chemical Technology Co.,Limited	58
Guangzhou Yuheng Pharmaceutical Technology Co., Ltd	58
Shanghai Rlavie Technology Co ltd	58
Hefei TNJ Chemical Industry Co.,Ltd.	58
Hefei Hirisun Pharmatech Co., Ltd	58

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

Update time	Product	Price	Min. Order	Purity	Supply Ability	Manufacturer
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
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
2019-07-06	4,5-DICHLORO-2-METHYLPYRIDAZIN-3-ONE 933-76-6	US $1.00 / KG	1KG	98%	150KG	Career Henan Chemical Co

4,5-Dichloro-2-Methylpyridazin-3-one
933-76-6
US $0.00-0.00 / KG
98%minHPLC
Shanghai Rlavie Technology Co ltd

4,5-Dichloro-2-Methylpyridazin-3-one
933-76-6
US $1.00 / KG
99%
Shaanxi Dideu Medichem Co. Ltd

4,5-DICHLORO-2-METHYLPYRIDAZIN-3-ONE
933-76-6
US $1.00 / KG
98%
Career Henan Chemical Co

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

4,5-DICHLORO-2-METHYLPYRIDAZIN-3-ONE(933-76-6)¹HNMR

933-76-6(4,5-DICHLORO-2-METHYLPYRIDAZIN-3-ONE)Related Search:

4,5-DICHLORO-2-(2-FLUOROBENZYL)PYRIDAZINE-3(2H)-ONE 2-(2-CHLORO-6-FLUOROBENZYL)-4,5-DICHLOROPYRIDAZINE-3-(2H)-ONE 1-PHENYL-4,5-DICHLORO-6-PYRIDAZONE 4,5-DICHLORO-2-(3,5-DICHLOROPHENYL)-2,3-DIHYDROPYRIDAZIN-3-ONE 4,5-DICHLORO-2-METHYLPYRIDAZIN-3-ONE

4,5-DICHLORO-2-(4-METHYLBENZYL)-2,3-DIHYDROPYRIDAZIN-3-ONE 4,5-DICHLORO-2-(HYDROXYMETHYL)-2,3-DIHYDROPYRIDAZIN-3-ONE 2-CHLOROMETHYL-4,5-DICHLOROPYRIDAZIN-3(2H)-ONE 4,5-dichloro-2-[3-(trifluoromethyl)phenyl]pyridazin-3(2H)-one 4,5-DICHLORO-2-(4-METHYLPHENYL)-2,3-DIHYDROPYRIDAZIN-3-ONE

2-(3-CHLORO-4-FLUOROPHENYL)-4,5-DICHLORO-PYRIDAZINE-3-(2H)-ONE 4,5-DICHLORO-2-(2,6-DICHLOROBENZYL)-2,3-DIHYDROPYRIDAZIN-3-ONE 4,5-DICHLORO-2-(2,4-DICHLOROPHENYL)-2,3-DIHYDROPYRIDAZIN-3-ONE 2-BENZYL-4,5-DICHLORO-2,3-DIHYDROPYRIDAZIN-3-ONE 4,5-DICHLORO-2-(4-CHLOROBENZYL)-2,3-DIHYDROPYRIDAZIN-3-ONE

4,5-DICHLORO-6-HYDROXY-2-(2-HYDROXYETHYL)-2,3-DIHYDROPYRIDAZIN-3-ONE (4,5-DICHLORO-6-OXO-1,6-DIHYDROPYRIDAZIN-1-YL)METHYL BENZOATE 4,5-DICHLORO-6-HYDROXY-2-[2-HYDROXY-3-(METHYLTHIO)PROPYL]-2,3-DIHYDROPYRIDAZIN-3-ONE

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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