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4-CHLORO-5-METHOXYPYRIDAZIN-3(2H)-ONE

4-CHLORO-5-METHOXYPYRIDAZIN-3(2H)-ONE structure

CAS No.: 63910-43-0

Chemical Name:: 4-CHLORO-5-METHOXYPYRIDAZIN-3(2H)-ONE

Synonyms: AURORA KA-6685;4-CHLORO-5-METHOXYPYRIDAZIN-3(2H)-ONE;5-chloro-4-methoxy-1H-pyridazin-6-one;3(2H)-Pyridazinone, 4-chloro-5-methoxy-;4-Chloro-5-methoxy-3(2H)-pyridazinone;4-chloro-5-methoxy-2,3-dihydropyridazin-3-one;4-Chloro-2,3-dihydro-5-methoxy-3-oxopyridazine;4-CHLORO-5-METHOXYPYRIDAZIN-3(2H)-ONE ISO 9001：2015 REACH

CBNumber:: CB3445170

Molecular Formula:: C5H5ClN2O2

Molecular Weight:: 160.56

MDL Number:: MFCD04971392

MOL File:: 63910-43-0.mol

MSDS File:: SDS

Last updated:2025-07-24 18:13:54

Product description	Number	Pack Size	Price
4-Chloro-5-methoxy-3(2H)-pyridazinone >98.0%(GC)(T)	C2972	1g	$189
4-Chloro-5-methoxy-3(2H)-pyridazinone >98.0%(GC)(T)	C2972	200mg	$64
4-Chloro-5-methoxypyridazin-3(2H)-one	C381765	100mg	$45
4-Chloro-5-methoxypyridazin-3(2H)-one	W7573	1g	$104
4-Chloro-5-methoxypyridazin-3(2H)-one	4H17-5-1G	1g	$200

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4-CHLORO-5-METHOXYPYRIDAZIN-3(2H)-ONE Properties

Melting point	225 °C(dec.)
Density	1.51±0.1 g/cm3(Predicted)
storage temp.	under inert gas (nitrogen or Argon) at 2-8°C
form	powder to crystal
pka	8.90±0.60(Predicted)
color	White to Orange to Green

SAFETY

Risk and Safety Statements

Symbol(GHS)

GHS07

Signal word

Warning

Hazard statements

H315-H319

Precautionary statements

P264-P280-P302+P352+P332+P313+P362+P364-P305+P351+P338+P337+P313

HS Code

2933399990

NFPA 704

	0
2		0

4-CHLORO-5-METHOXYPYRIDAZIN-3(2H)-ONE price More Price(21)

Manufacturer	Product number	Product description	CAS number	Packaging	Price	Updated	Buy
TCI Chemical	C2972	4-Chloro-5-methoxy-3(2H)-pyridazinone >98.0%(GC)(T)	63910-43-0	1g	$189	2025-07-31	Buy
TCI Chemical	C2972	4-Chloro-5-methoxy-3(2H)-pyridazinone >98.0%(GC)(T)	63910-43-0	200mg	$64	2025-07-31	Buy
TRC	C381765	4-Chloro-5-methoxypyridazin-3(2H)-one	63910-43-0	100mg	$45	2021-12-16	Buy
AK Scientific	W7573	4-Chloro-5-methoxypyridazin-3(2H)-one	63910-43-0	1g	$104	2021-12-16	Buy
SynQuest Laboratories	4H17-5-1G	4-Chloro-5-methoxypyridazin-3(2H)-one	63910-43-0	1g	$200	2021-12-16	Buy

Product number	Packaging	Price	Buy
C2972	1g	$189	Buy
C2972	200mg	$64	Buy
C381765	100mg	$45	Buy
W7573	1g	$104	Buy
4H17-5-1G	1g	$200	Buy

4-CHLORO-5-METHOXYPYRIDAZIN-3(2H)-ONE Chemical Properties,Uses,Production

Synthesis

932-22-9

124-41-4

63910-43-0

General procedure for the synthesis of 4-chloro-5-methoxypyridazin-3(2H)-one (10): to a solution of 4,5-dichloropyridazin-3(2H)-one (4.1 g, 24.8 mmol) in methanol (50 mL) was added sodium methanolate (2.6 g, 74.5 mmol). The reaction mixture was stirred at 80 °C overnight. Upon completion of the reaction, the mixture was concentrated under reduced pressure and purified by column chromatography [eluent: petroleum ether to petroleum ether/dichloromethane/methanol (10:1:1)] to afford the target product, 4-chloro-5-methoxypyridazin-3(2H)-one (10) (1.2 g, 30% yield), as a white solid. The procedure for the synthesis of 4-chloro-2-(2-chlorobenzyl)-5-methoxypyridazin-3(2H)-one (11) was not provided with complete information.

References

[1] Journal of Medicinal Chemistry, 2004, vol. 47, # 19, p. 4716 - 4730
[2] Patent: WO2015/143164, 2015, A1. Location in patent: Page/Page column 115
[3] Monatshefte fuer Chemie, 1989, vol. 120, p. 329 - 342

4-CHLORO-5-METHOXYPYRIDAZIN-3(2H)-ONE Preparation Products And Raw materials

Raw materials

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

Preparation Products

5-METHOXYPYRIDAZIN-3(2H)-ONE 3-CHLORO-5-METHOXYPYRIDAZINE

4-CHLORO-5-METHOXYPYRIDAZIN-3(2H)-ONE Suppliers

Global( 114)Suppliers

Supplier	Tel	Email	Country	ProdList	Advantage
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
CONIER CHEM AND PHARMA LIMITED	+8618523575427	sales@conier.com	China	49975	58
career henan chemical co	+86-0371-86658258 +8613203830695	factory@coreychem.com	China	29798	58
Guangzhou Yuheng Pharmaceutical Technology Co., Ltd	+8613580539051	joe@yuhengpharm.com	CHINA	21142	58
Neostar United (Changzhou) Industrial Co., Ltd.	+86-0519-85551759 +8613506123987	marketing1@neostarunited.com	China	8830	58
Shanghai Rlavie Technology Co ltd	+86-021-67759270 +8617717059219	sales@rlavie.com	China	1030	58
Dideu Industries Group Limited	+86-29-89586680 +86-15129568250	1026@dideu.com	China	20284	58
Hefei Hirisun Pharmatech Co., Ltd	+8615056975894	shawn@hirisunpharm.com	CHINA	9911	58

Supplier	Advantage
Hubei xin bonus chemical co. LTD	58
Alchem Pharmtech,Inc.	58
Nanjing jinheyou Trading Co., Ltd.	58
CONIER CHEM AND PHARMA LIMITED	58
career henan chemical co	58
Guangzhou Yuheng Pharmaceutical Technology Co., Ltd	58
Neostar United (Changzhou) Industrial Co., Ltd.	58
Shanghai Rlavie Technology Co ltd	58
Dideu Industries Group Limited	58
Hefei Hirisun Pharmatech Co., Ltd	58

View Lastest Price from 4-CHLORO-5-METHOXYPYRIDAZIN-3(2H)-ONE manufacturers

Update time	Product	Price	Min. Order	Purity	Supply Ability	Manufacturer
2022-01-04	4-chloro-5-methoxypyridazin-3(2H)-one 63910-43-0	US $0.00-0.00 / KG	1g	98%minHPLC	10kgs/month	Shanghai Rlavie Technology Co ltd
2019-12-26	4-CHLORO-5-METHOXYPYRIDAZIN-3(2H)-ONE 63910-43-0	US $1.00 / KG	1KG	99%	200kg	Career Henan Chemical Co
2019-12-23	4-CHLORO-5-METHOXYPYRIDAZIN-3(2H)-ONE 63910-43-0	US $0.00 / g	1g	95%min	20kg/month	Nanjing jinheyou Trading Co., Ltd.

4-chloro-5-methoxypyridazin-3(2H)-one
63910-43-0
US $0.00-0.00 / KG
98%minHPLC
Shanghai Rlavie Technology Co ltd

4-CHLORO-5-METHOXYPYRIDAZIN-3(2H)-ONE
63910-43-0
US $1.00 / KG
99%
Career Henan Chemical Co

4-CHLORO-5-METHOXYPYRIDAZIN-3(2H)-ONE
63910-43-0
US $0.00 / g
95%min
Nanjing jinheyou Trading Co., Ltd.

4-CHLORO-5-METHOXYPYRIDAZIN-3(2H)-ONE Spectrum

4-CHLORO-5-METHOXYPYRIDAZIN-3(2H)-ONE(63910-43-0)¹HNMR

63910-43-0(4-CHLORO-5-METHOXYPYRIDAZIN-3(2H)-ONE)Related Search:

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4-CHLORO-5-METHOXYPYRIDAZIN-3(2H)-ONE AURORA KA-6685 4-Chloro-2,3-dihydro-5-methoxy-3-oxopyridazine 5-chloro-4-methoxy-1H-pyridazin-6-one 4-Chloro-5-methoxy-3(2H)-pyridazinone 4-chloro-5-methoxy-2,3-dihydropyridazin-3-one 3(2H)-Pyridazinone, 4-chloro-5-methoxy- 4-CHLORO-5-METHOXYPYRIDAZIN-3(2H)-ONE ISO 9001：2015 REACH 63910-43-0 Pyrazines, Pyrimidines & Pyridazines Pyrazines, Pyrimidines & Pyridazines