Shanghai Nianxing Industrial Co., Ltd
China
Product Name: 4-Chlorocatechol
Price: Check
Purity: 98.0%
Stocking Period: 10 Day
Contact: Yang
Email: sales@echemcloud.com

Shanghai Jizhi Biochemical Technology Co., Ltd
China
Product Name: 4-Chlorocatechol
Price: ￥4968.0/25g ￥1718.0/5g
Purity: 98.0%
Stocking Period: 2 Day
Contact: Liu jia
Email: 2130147988@qq.com

DC Chemicals Limited
China
Product Name: 4-Chlorocatechol
Price: $Inquiry/250mg $Inquiry/100mg $Inquiry/1g
Purity: 98.0%
Stocking Period: 3 Day
Contact: Tony Cao
Email: sales@dcchemicals.com

Dayang Chem (Hangzhou) Co., Ltd.
China
Product Name: 4-Chlorobenzene-1,2-diol
Price: $Inquiry/100g $Inquiry/1kg $Inquiry/100kg $Inquiry/1000kg
Purity: 98.0%
Stocking Period: Inquiry
Contact: Ms Wang
Email: enquiry@dycnchem.com

2138-22-9

2138-22-9 structure

2138-22-9 structure

Name: 4-Chlorocatechol
Chemical Name: 4-chlorocatechol
CAS Number: 2138-22-9
Molecular Formula: C₆H₅ClO₂
Molecular Weight: 144.556
Catalog: Research Areas Others
Create Date: 2018-04-25 08:00:00
Modify Date: 2025-08-23 21:37:08
4-Chlorocatechol is a major degradation product of 4-chloro-2-aminophenol (4C2AP). 4-Chlorocatechol is also a substrate for catechol 1,2-dioxygenases and chlorocatechol dioxygenase[1][2].

Name	4-chlorocatechol
Synonyms	4-Chloro-1,2-benzenediol 1,2-Benzenediol, 4-chloro- 4-chloropyrocatechol 1,2-dihydroxy 4-chlorobenzene 4-Chlorobenzene-1,2-diol Pyrocatechol,4-chloro EINECS 218-381-9 MFCD00059614 4-Chloro-1,2-dihydroxybenzene 1,2-Benzenediol,4-chloro p-Cl-catechol 3,4-dihydroxychlorobenzene 4-Chlorbenzol-1,2-diol 4-Chlorocatechol

Description	4-Chlorocatechol is a major degradation product of 4-chloro-2-aminophenol (4C2AP). 4-Chlorocatechol is also a substrate for catechol 1,2-dioxygenases and chlorocatechol dioxygenase[1][2].
Related Catalog	Research Areas >> Others Signaling Pathways >> Others >> Others
References	[1]. Pankaj Kumar Arora, et al. Novel degradation pathway of 4-chloro-2-aminophenol via 4-chlorocatechol in Burkholderia sp. RKJ 800. Environ Sci Pollut Res Int. 2014 Feb;21(3):2298-2304. [2]. Raffaella Caglio, et al. Fine-tuning of catalytic properties of catechol 1,2-dioxygenase by active site tailoring. Chembiochem. 2009 Apr 17;10(6):1015-24.

Density	1.5±0.1 g/cm3
Boiling Point	267.1±20.0 °C at 760 mmHg
Melting Point	90-94 °C(lit.)
Molecular Formula	C₆H₅ClO₂
Molecular Weight	144.556
Flash Point	115.3±21.8 °C
Exact Mass	143.997803
PSA	40.46000
LogP	2.15
Vapour Pressure	0.0±0.6 mmHg at 25°C
Index of Refraction	1.629

CHEMICAL IDENTIFICATION

RTECS NUMBER :: UX1490000

CHEMICAL NAME :: Pyrocatechol, 4-chloro-

CAS REGISTRY NUMBER :: 2138-22-9

BEILSTEIN REFERENCE NO. :: 1907691

LAST UPDATED :: 199612

DATA ITEMS CITED :: 1

MOLECULAR FORMULA :: C6-H5-Cl-O2

MOLECULAR WEIGHT :: 144.56

WISWESSER LINE NOTATION :: QR BQ DG

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Intravenous

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 75 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: CSLNX* U.S. Army Armament Research & Development Command, Chemical Systems Laboratory, NIOSH Exchange Chemicals. (Aberdeen Proving Ground, MD 21010) Volume(issue)/page/year: NX#07880

Symbol	GHS05
Signal Word	Danger
Hazard Statements	H314
Precautionary Statements	P280-P305 + P351 + P338-P310
Personal Protective Equipment	Eyeshields;Faceshields;full-face particle respirator type N100 (US);Gloves;respirator cartridge type N100 (US);type P1 (EN143) respirator filter;type P3 (EN 143) respirator cartridges
Hazard Codes	C: Corrosive;
Risk Phrases	R34
Safety Phrases	S26-S36/37/39-S45
RIDADR	UN 1759 8/PG 2
WGK Germany	3
RTECS	UX1490000
Packaging Group	II
HS Code	2908199090

Precursor 9
106-48-9 635-93-8 120-80-9 1121-75-1
110851-18-8 1315577-25-3 1344113-42-3 67470-96-6
407-25-0
DownStream 10
3428-24-8 931-17-9 108-94-1 533-60-8
108-93-0 108-95-2 57744-68-0 38964-22-6
33857-26-0 86873-60-1

HS Code	2908199090
Summary	HS: 2908199090. derivatives of polyphenols or phenol-alcohols containing only halogen substituents and their salts. VAT:17.0%. tax rebate rate:9.0%. supervision conditions:None. MFN tariff:5.5%. general tariff:30.0%

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