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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: 4-CHLORO-1,2-DIHYDROXYBENZENE;AIDS-017780;Chlorocatechol;4-CHLOROCATECHOL;4-CHLOROCATHECOL;4-chloro-pyrocatecho;4-MONOCHLOROCATECHOL;4-Chlorocatechol 97%;4-Chlorocatechol >Glycerol Impurity 76

CBNumber:: CB2668875

Molecular Formula:: C6H5ClO2

Molecular Weight:: 144.56

MDL Number:: MFCD00059614

MOL File:: 2138-22-9.mol

MSDS File:: SDS

TDS File:: TDS

Last updated:2026-05-28 00:38:31

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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
InChI	1S/C6H5ClO2/c7-4-1-2-5(8)6(9)3-4/h1-3,8-9H
InChIKey	WWOBYPKUYODHDG-UHFFFAOYSA-N
SMILES	Oc1ccc(Cl)cc1O
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

PPE

Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges

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

Storage Class

8A - Combustible corrosive hazardous materials

Hazard Classifications

Skin Corr. 1B

NFPA 704

	0
3		0

4-Chlorobenzene-1,2-diol price More Price(30)

Manufacturer	Product number	Product description	CAS number	Packaging	Price	Updated	Buy
Sigma-Aldrich	148520	4-Chlorocatechol 97%	2138-22-9	1g	$136	2026-04-30	Buy
TCI Chemical	C0568	4-Chlorocatechol >98.0%(GC)	2138-22-9	5g	$134	2026-04-30	Buy
TCI Chemical	C0568	4-Chlorocatechol >98.0%(GC)	2138-22-9	25g	$447	2026-04-30	Buy
ChemScene	CS-0128330	4-Chlorocatechol ≥98%	2138-22-9	250mg	$15	2026-06-04	Buy
ChemScene	CS-0128330	4-Chlorocatechol ≥98%	2138-22-9	1g	$16	2026-06-04	Buy

Product number	Packaging	Price	Buy
148520	1g	$136	Buy
C0568	5g	$134	Buy
C0568	25g	$447	Buy
CS-0128330	250mg	$15	Buy
CS-0128330	1g	$16	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 Suppliers ( 140)

Supplier	Tel	Email	Country	ProdList	Advantage
J & K SCIENTIFIC LTD.	18210857532 18210857532	jkinfo@jkchemical.com	China	96815	76
TCI (Shanghai) Development Co., Ltd.	021-67121386	Sales-CN@TCIchemicals.com	China	24512	81
Energy Chemical	400-0056266	sales8178@energy-chemical.com	China	44850	61
Capot Chemical Co., Ltd	+86 (0) 571 85 58 67 18		China	18187	66
Adamas Reagent, Ltd.	400-6009262 15618770481	yhx@titansci.com	China	14098	59
Shandong Xiya Chemical Co., Ltd	13355009207 13355009207	3007715519@qq.com	China	18722	57
Nanjing Vital Chemical Co., Ltd.	Please Send Email 18652950785	chemweiao@163.com	China	4368	65
Jiangsu Aikon Biopharmaceutical R&D co.,Ltd.	025-66113011 13913916777	cfzhang@aikonchem.com	China	19902	55
TOKYO CHEMICAL INDUSTRY CO., LTD.	03-36680489	Sales-JP@TCIchemicals.com	Japan	28364	80
TCI Europe	320-37350700	sales@tcieurope.eu	Europe	23654	75

Supplier	Advantage
J & K SCIENTIFIC LTD.	76
TCI (Shanghai) Development Co., Ltd.	81
Energy Chemical	61
Capot Chemical Co., Ltd	66
Adamas Reagent, Ltd.	59
Shandong Xiya Chemical Co., Ltd	57
Nanjing Vital Chemical Co., Ltd.	65
Jiangsu Aikon Biopharmaceutical R&D co.,Ltd.	55
TOKYO CHEMICAL INDUSTRY CO., LTD.	80
TCI Europe	75

View Latest 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	$1.00	1KG	99%	100kg	Career Henan Chemical Co

4-Chlorobenzene-1,2-diol
2138-22-9
$1.00
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

2138-22-9 (4-Chlorobenzene-1,2-diol) Related Search:

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1of4

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 4-Chlorocatechol (Standard) 4-CHLORO-1,2-DIHYDROXYBENZENE 2138-22-9 C6H5ClO2 Organic Building Blocks Polyols Oxygen Compounds Building Blocks Benzenes Organic Building Blocks Oxygen Compounds Polyols Phenol&Thiophenol&Mercaptan Heterocyclic Compounds