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

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

CAS No.: 932-22-9

Chemical Name:: 4,5-Dichloro-3(2H)-pyridazinone

Synonyms: 4,5-DICHLOROPYRIDAZIN-3(2H)-ONE;NSC 16127;NSC 17182;NSC 240022;AKOS B029197;AURORA KA-447;TIMTEC-BB SBB003910;OTAVA-BB BB0128630031;LABOTEST-BB LT00138189;oro-3-hydroxypyridazine

CBNumber:: CB1308262

Molecular Formula:: C4H2Cl2N2O

Molecular Weight:: 164.98

MDL Number:: MFCD00051504

MOL File:: 932-22-9.mol

MSDS File:: SDS

Last updated:2026-01-13 11:13:53

Product description	Number	Pack Size	Price
4,5-Dichloro-3-hydroxypyridazine 98%	303097	25g	$59
4,5-Dichloro-3(2H)-pyridazinone >98.0%(GC)(T)	D2768	25g	$71
4,5-Dichloro-3(2H)-pyridazinone >98.0%(GC)(T)	D2768	100g	$205
4,5-Dichloro-6-pyridazone	009263	100mg	$403
4,5-Dichloro-6-pyridazone	D435826	100mg	$45
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4,5-Dichloro-3(2H)-pyridazinone Properties

Melting point	204-206 °C(lit.)
Density	1.76±0.1 g/cm3(Predicted)
storage temp.	Keep in dark place,Sealed in dry,Room Temperature
solubility	DMSO (Slightly), Methanol (Slightly)
pka	8.39±0.60(Predicted)
form	Crystalline Powder
color	White to yellow
BRN	120959
InChI	InChI=1S/C4H2Cl2N2O/c5-2-1-7-8-4(9)3(2)6/h1H,(H,8,9)
InChIKey	VJWXIRQLLGYIDI-UHFFFAOYSA-N
SMILES	C1(=O)NN=CC(Cl)=C1Cl
CAS DataBase Reference	932-22-9(CAS DataBase Reference)
EWG's Food Scores	1
FDA UNII	8FQ8PU4SSS
UNSPSC Code	12352100
NACRES	NA.22

SAFETY

Risk and Safety Statements

Symbol(GHS)

GHS07

Signal word

Warning

Hazard statements

H315-H319-H302-H335

Precautionary statements

P261-P280a-P304+P340-P305+P351+P338-P405-P501a-P264-P280-P302+P352+P332+P313+P362+P364-P305+P351+P338+P337+P313

PPE

Eyeshields, Gloves, type N95 (US)

Hazard Codes

Xi,Xn

Risk Statements

36/37/38-22

Safety Statements

26-36-37/39

WGK Germany

RTECS

UR6182000

HazardClass

IRRITANT

HS Code

29349990

Storage Class

11 - Combustible Solids

Hazard Classifications

Acute Tox. 4 Oral

NFPA 704

	1
2		0

4,5-Dichloro-3(2H)-pyridazinone price More Price(40)

Manufacturer	Product number	Product description	CAS number	Packaging	Price	Updated	Buy
Sigma-Aldrich	303097	4,5-Dichloro-3-hydroxypyridazine 98%	932-22-9	25g	$59	2023-06-20	Buy
TCI Chemical	D2768	4,5-Dichloro-3(2H)-pyridazinone >98.0%(GC)(T)	932-22-9	25g	$71	2025-07-31	Buy
TCI Chemical	D2768	4,5-Dichloro-3(2H)-pyridazinone >98.0%(GC)(T)	932-22-9	100g	$205	2025-07-31	Buy
Usbiological	009263	4,5-Dichloro-6-pyridazone	932-22-9	100mg	$403	2021-12-16	Buy
TRC	D435826	4,5-Dichloro-6-pyridazone	932-22-9	100mg	$45	2021-12-16	Buy

Product number	Packaging	Price	Buy
303097	25g	$59	Buy
D2768	25g	$71	Buy
D2768	100g	$205	Buy
009263	100mg	$403	Buy
D435826	100mg	$45	Buy

4,5-Dichloro-3(2H)-pyridazinone Chemical Properties,Uses,Production

Chemical Properties

Beige Crystalline Solid

Uses

4,5-Dichloro-3(2H)-pyridazinone is used as a new labelled substituted pyridazinone with tuberculostatic action.

Synthesis Reference(s)

Journal of Heterocyclic Chemistry, 28, p. 385, 1991 DOI: 10.1002/jhet.5570280234

General Description

The solid phase FT-IR and FT-Raman spectra of 4,5-dichloro-3-hydroxypyridazine was studied.

Hazard

4,5-Dichloro-3(2H)-pyridazinone causes skin irritation and serious eye irritation, it may cause respiratory irritation.

Synthesis

Hydrazine sulfate (305.7 g, 2.35 mol) was added to a solution of 3,4-dichloro-5-hydroxy-5H-furan-2-one (419 g, 2.48 mol) and sodium acetate (212 g, 2.58 mol) in water (600 mL). The mixture was stirred under reflux for 4 h. After filtration and evaporation, the residual solid was recrystallized from ethanol to provide 4,5-dichloropyridazin-3(2H)-one (216 g, 67%) as an off-white solid.

4,5-Dichloro-3(2H)-pyridazinone Preparation Products And Raw materials

Raw materials

Ethanol Hydrazine hydrate Acetic acid Semicarbazide hydrochloride Mucochloric acid

Sodium carbonate

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Preparation Products

1-PHENYL-4,5-DICHLORO-6-PYRIDAZONE 4,5-Dichloro-2-(tetrahydro-pyran-2-yl)-2H-pyridazin-3-one 2,4,5-TRICHLORO-3(2H)-PYRIDAZINONE 4-HYDROXY-5-NITROPYRIDAZIN-3(2H)-ONE 4-chloro-5-piperazin-1-ylpyridazin-3(2H)-one

4,5-DICHLORO-2-(HYDROXYMETHYL)-2,3-DIHYDROPYRIDAZIN-3-ONE

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

Global( 270)Suppliers

Supplier	Tel	Email	Country	ProdList	Advantage
Hangzhou Lucky Biology Co., Ltd	+8618105713381	lucky@lkbiology.com	China	159	58
Shijiazhuang Leon Chemicals Co.,Ltd	+8615203111882	leonchem@outlook.com	China	22	58
ZHENGZHOU JIUYI TIME NEW MATERIALS CO,.LTD	+86-13017695106 +86-13676922317	jiuyitime@fdachem.com	China	16513	58
Capot Chemical Co.,Ltd.	+86-（0）57185586718; +8613336195806	sales@capot.com	China	29735	60
Nanjing ChemLin Chemical Industry Co., Ltd.	025-83697070	product@chemlin.com.cn	CHINA	3009	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	29831	58
Hubei xin bonus chemical co. LTD	86-13657291602	linda@hubeijusheng.com	CHINA	22963	58
Alchem Pharmtech,Inc.	8485655694	sales@alchempharmtech.com	United States	63687	58
Nanjing jinheyou Trading Co., Ltd.	15705188088	admin@jheyou.com	CHINA	1268	58

Supplier	Advantage
Hangzhou Lucky Biology Co., Ltd	58
Shijiazhuang Leon Chemicals Co.,Ltd	58
ZHENGZHOU JIUYI TIME NEW MATERIALS CO,.LTD	58
Capot Chemical Co.,Ltd.	60
Nanjing ChemLin Chemical Industry Co., Ltd.	60
ATK CHEMICAL COMPANY LIMITED	60
career henan chemical co	58
Hubei xin bonus chemical co. LTD	58
Alchem Pharmtech,Inc.	58
Nanjing jinheyou Trading Co., Ltd.	58

View Lastest Price from 4,5-Dichloro-3(2H)-pyridazinone manufacturers

Update time	Product	Price	Min. Order	Purity	Supply Ability	Manufacturer
2025-11-18	4,5-Dichloro-3(2H)-pyridazinone 932-22-9	US $1.10 / g	1g	99.00%	100 Tons Min	Dideu Industries Group Limited
2025-10-13	4,5-Dichloro-3(2H)-pyridazinone 932-22-9	US $2.00-6.00 / kg	1kg	99%	100kg	ZHENGZHOU JIUYI TIME NEW MATERIALS CO,.LTD
2022-02-23	4,5-Dichloro-3(2H)-pyridazinone 932-22-9	US $0.00 / KG	1KG	97.2%	100 tons	Honest Joy Holdings Limited

4,5-Dichloro-3(2H)-pyridazinone
932-22-9
US $1.10 / g
99.00%
Dideu Industries Group Limited

4,5-Dichloro-3(2H)-pyridazinone
932-22-9
US $2.00-6.00 / kg
99%
ZHENGZHOU JIUYI TIME NEW MATERIALS CO,.LTD

4,5-Dichloro-3(2H)-pyridazinone
932-22-9
US $0.00 / KG
97.2%
Honest Joy Holdings Limited

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

4,5-Dichloro-3(2H)-pyridazinone(932-22-9)¹HNMR 4,5-Dichloro-3(2H)-pyridazinone(932-22-9)Raman 4,5-Dichloro-3(2H)-pyridazinone(932-22-9)IR 4,5-Dichloro-3(2H)-pyridazinone(932-22-9)FT-IR

932-22-9(4,5-Dichloro-3(2H)-pyridazinone)Related Search:

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2',4'-Dichloroacetophenone 4,5-DICHLORO-2-METHYLPYRIDAZIN-3-ONE 2-(2-CHLORO-6-FLUOROBENZYL)-4,5-DICHLOROPYRIDAZINE-3-(2H)-ONE 4,5-DICHLORO-2-(2-FLUOROBENZYL)PYRIDAZINE-3(2H)-ONE 4,5-DICHLORO-1-PHENYL-6-PYRIDAZINONE

4,5-DICHLORO-2-(3,5-DICHLOROPHENYL)-2,3-DIHYDROPYRIDAZIN-3-ONE Pyridazine 4,5-DICHLORO-2-(4-METHYLPHENYL)-2,3-DIHYDROPYRIDAZIN-3-ONE

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AURORA KA-447 LABOTEST-BB LT00138189 AKOS B029197 4,5-DICHLOROPYRIDAZIN-3(2H)-ONE 4,5-DICHLOROPYRIDAZIN-3-ONE 4,5-Dichloro-3-pyridazinol 4,5-DICHLORO-3-HYDROXYPYRIDAZINE 4,5-DICHLORO-3(2H)-PYRIDAZINONE 4,5-DICHLORO-2H-PYRIDAZIN-3-ONE 4,5-DICHLORO-2,3-DIHYDROPYRIDAZIN-3-ONE 2-[[2-(diethylamino)-1-oxoethyl]amino]-4-methyl-5-(phenylmethyl)-1H-pyrrole-3-carboxamide 4,5-dichloro-3(2h)-pyridazinon OTAVA-BB BB0128630031 TIMTEC-BB SBB003910 3-Hydroxy-4,5-dichloropyridazine 4,5-Dichloro-3(2H)-pyridazone 4,5-Dichloro-6-oxo-1H-pyridazine 4,5-Dichloro-6-pyridazone NSC 16127 NSC 17182 NSC 240022 4,5-Dichloro-3-pyridazone 4,5-Dichloro-2,3-dihydropyridazine-3-one 4,5-Dichloropyridazin-6(1H)-one 4,5-Dichloropyridazine-3-ol 4,5-DICHLOROPYRIDAZIN-3(2H)-ONE 98% 3(2H)-pyridazinone, 4,5-dichloro- 5-Dichloro-2H-pyridazin-3-one 4,5-Dichloro-2,3-dihydro-3-oxopyridazine 4,5-dichloro-1,2-dihydropyriMidin-2-one 4,5-Dichloro-3-hydroxypyridazine 98% 4,5-dichloro-1H-pyridazin-6-one 4,5-Dichloro-3-hydroxypyr... 4,5-Dichloro-3(2H)-pyridazinone> oro-3-hydroxypyridazine 4,5-Dichloro-3(2H)-pyridazinone ISO 9001：2015 REACH Dichloro-3(2H)-Pyridazinone 4,5-Dichloro-3-hydroxypyridazine, 98% 932-22-9 13183-73-6 923-22-9 Building Blocks Pyridazines Heterocyclic Building Blocks Halogenated Heterocycles Piperazine series Pyridazine series Bases & Related Reagents Heterocycles Nucleotides