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4-Chlorobenzene-1,2-diol

4-Chlorobenzene-1,2-diol structure

CAS No.: 2138-22-9

Chemical Name:: 4-Chlorobenzene-1,2-diol

Synonyms: AIDS-017780;Chlorocatechol;4-CHLOROCATECHOL;4-CHLOROCATHECOL;4-chloro-pyrocatecho;4-MONOCHLOROCATECHOL;4-Chlorocatechol 97%;4-Chlorocatechol >Glycerol Impurity 76;4-CHLOROCATECHOL 98+%

CBNumber:: CB2668875

Molecular Formula:: C6H5ClO2

Molecular Weight:: 144.56

MDL Number:: MFCD00059614

MOL File:: 2138-22-9.mol

MSDS File:: SDS

Last updated:2025-01-27 09:38:02

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4-Chlorobenzene-1,2-diol Properties

Melting point	90-94 °C (lit.)
Boiling point	140°C 10,5mm
Density	1.2558 (rough estimate)
refractive index	1.4620 (estimate)
storage temp.	Inert atmosphere,Room Temperature
solubility	Chloroform (Slightly), Methanol (Slightly)
pka	8.84±0.10(Predicted)
form	powder to crystal
color	White to Light yellow to Light orange
InChIKey	WWOBYPKUYODHDG-UHFFFAOYSA-N
CAS DataBase Reference	2138-22-9(CAS DataBase Reference)
FDA UNII	I01EXU3P3J
UNSPSC Code	12352100
NACRES	NA.22

SAFETY

Risk and Safety Statements

Symbol(GHS)

GHS05

Signal word

Danger

Hazard statements

H314

Precautionary statements

P260-P280-P303+P361+P353-P304+P340+P310-P305+P351+P338-P363

Hazard Codes

Risk Statements

Safety Statements

26-36/37/39-45

RIDADR

UN 1759 8/PG 2

WGK Germany

RTECS

UX1490000

HazardClass

PackingGroup

HS Code

29081990

NFPA 704

	0
3		0

4-Chlorobenzene-1,2-diol price More Price(17)

Manufacturer	Product number	Product description	CAS number	Packaging	Price	Updated	Buy
Sigma-Aldrich	148520	4-Chlorocatechol 97%	2138-22-9	1g	$128	2025-07-31	Buy
TCI Chemical	C0568	4-Chlorocatechol >98.0%(GC)	2138-22-9	5g	$192	2025-07-31	Buy
TCI Chemical	C0568	4-Chlorocatechol >98.0%(GC)	2138-22-9	25g	$574	2025-07-31	Buy
TRC	C381100	4-Chloropyrocatechol	2138-22-9	10g	$800	2021-12-16	Buy
American Custom Chemicals Corporation	HCH0013158	4-CHLOROCATECHOL 95.00%	2138-22-9	1G	$698.91	2021-12-16	Buy

Product number	Packaging	Price	Buy
148520	1g	$128	Buy
C0568	5g	$192	Buy
C0568	25g	$574	Buy
C381100	10g	$800	Buy
HCH0013158	1G	$698.91	Buy

4-Chlorobenzene-1,2-diol Chemical Properties,Uses,Production

Uses

4-chlorocatechol was a major degradation product of 4-chloro-2-aminophenol (4C2AP)1. The degradation of 4-chlorocatechol was catalyzed by cphA-I enzyme2.

Definition

ChEBI: A chlorocatechol that is catechol substituted by a chloro group at position 4.

Synthesis Reference(s)

Tetrahedron Letters, 33, p. 865, 1992 DOI: 10.1016/S0040-4039(00)91561-2

General Description

4-chlorocatechol was a major degradation product of 4-chloro-2-aminophenol (4C2AP). The degradation of 4-chlorocatechol was catalyzed by cphA-I enzyme.

4-Chlorobenzene-1,2-diol Preparation Products And Raw materials

Raw materials

4-Chlororesorcinol

Preparation Products

5-Chloropyridine-2-carboxylic acid

4-Chlorobenzene-1,2-diol Suppliers

Global( 138)Suppliers

Supplier	Tel	Email	Country	ProdList	Advantage
career henan chemical co	+86-0371-86658258 +8613203830695	sales@coreychem.com	China	29855	58
CONIER CHEM AND PHARMA LIMITED	+8618523575427	sales@conier.com	China	49975	58
Richest Group Ltd	18017061086	oled@richest-group.com	CHINA	5600	58
Hefei TNJ Chemical Industry Co.,Ltd.	+86-0551-65418671 +8618949823763	sales@tnjchem.com	China	34563	58
Dayang Chem (Hangzhou) Co.,Ltd.	+86-0571-88938639 +8617705817739	info@dycnchem.com	China	52846	58
Henan Alfa Chemical Co., Ltd	+8615838112936	alfa10@alfachem.cn	China	12931	58
Nanjing Doge Biomedical Technology Co., Ltd	+86-25-58227606 +86-15305155328	sales@dogechemical.com	China	4128	58
LEAP CHEM CO., LTD.	+86-852-30606658 19957148339;	market18@leapchem.com	China	24727	58
Aromsyn Co., Ltd.	+86-0571-85585865 +8613336024896	CB@aromsyn.com	China	19183	58
Hebei Chuanghai Biotechnology Co., Ltd	+8615531151365	mina@chuanghaibio.com	China	18126	58

Supplier	Advantage
career henan chemical co	58
CONIER CHEM AND PHARMA LIMITED	58
Richest Group Ltd	58
Hefei TNJ Chemical Industry Co.,Ltd.	58
Dayang Chem (Hangzhou) Co.,Ltd.	58
Henan Alfa Chemical Co., Ltd	58
Nanjing Doge Biomedical Technology Co., Ltd	58
LEAP CHEM CO., LTD.	58
Aromsyn Co., Ltd.	58
Hebei Chuanghai Biotechnology Co., Ltd	58

View Lastest Price from 4-Chlorobenzene-1,2-diol manufacturers

Image	Update time	Product	Price	Min. Order	Purity	Supply Ability	Manufacturer
	2019-07-12	4-Chlorobenzene-1,2-diol 2138-22-9	US $1.00 / KG	1KG	99%	100kg	Career Henan Chemical Co

4-Chlorobenzene-1,2-diol
2138-22-9
US $1.00 / KG
99%
Career Henan Chemical Co

4-Chlorobenzene-1,2-diol Spectrum

4-Chlorobenzene-1,2-diol(2138-22-9)MS 4-Chlorobenzene-1,2-diol(2138-22-9)¹HNMR 4-Chlorobenzene-1,2-diol(2138-22-9)¹³CNMR 4-Chlorobenzene-1,2-diol(2138-22-9)IR1 4-Chlorobenzene-1,2-diol(2138-22-9)IR2

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4-CHLORO-1,2-DIHYDROXYBENZENE 4-CHLOROCATHECOL 4-CHLOROCATECHOL 4-chloro-2-benzenediol 4-chloro-pyrocatecho Chlorocatechol AIDS-017780 4-MONOCHLOROCATECHOL 4-CHLOROCATECHOL 98+% 4-Chlorobenzene-1,2-diol 2-Hydroxy-4-chlorophenol 4-Chloro-2-hydroxyphenol 4-Chlorocatechol 97% 4-Chlorocatechol > 1,2-Benzenediol, 4-chloro- 4-Chlorocatechol in isopropanol C11395300 4-Chlorocatechol Glycerol Impurity 76 2138-22-9 C6H5ClO2 Organic Building Blocks Polyols Oxygen Compounds Building Blocks Benzenes Organic Building Blocks Oxygen Compounds Polyols Phenol&Thiophenol&Mercaptan Heterocyclic Compounds