2-Chloro-3',4'-dihydroxyacetophenone

Also known as: 3,4-dihydroxyphenacyl chloride, 2-Chloro-1-(3,4-dihydroxyphenyl)ethanone, 4-(Chloroacetyl)catechol, α-Chloro-3,4-dihydroxyacetophenone, 3',4'-DIHYDROXY-2-CHLORO ACETOPHENONE, 3,4-DIHYDROXY-2'-CHLOROACETOPHENONE, 3,4-DIHYDROXY-W-CHLOROACETOPHENONE, 4-(Chloroacetyl)pyrocatechol, Ethanone, 2-chloro-1-(3,4-dihydroxyphenyl)-, MFCD00002200

2-Chloro-3',4'-dihydroxyacetophenone (CAS 99-40-1) is a compound in the Alcohols category listed in the Jingsj chemical database. It has the molecular formula C8H7ClO3 and a molecular weight of 186.592 g/mol. Key properties include a melting point of 174-176 °C(lit.), a boiling point of 418.7±35.0 °C at 760 mmHg, a density of 1.4±0.1 g/cm3 and a flash point of 207.0±25.9 °C. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 99-40-1
Jingsj CID: J-26501-0
Molecular Formula: C₈H₇ClO₃
Molecular Weight: 186.592 g/mol
Category: Alcohols
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	174-176 °C(lit.)
Boiling Point	418.7±35.0 °C at 760 mmHg
Density	1.4±0.1 g/cm3
Flash Point	207.0±25.9 °C
Exact Mass	186.008377
PSA	57.53000
LogP	1.47
Vapor Pressure	0.0±1.0 mmHg at 25°C
Refractive Index	1.612

GHS Safety & Compliance

IrritantSignal word: Warning

H315 — Causes skin irritation
H319 — Causes serious eye irritation
H335 — May cause respiratory irritation

Customs & Trade Information

HS Code	2914700090
Summary	HS: 2914700090 halogenated, sulphonated, nitrated or nitrosated derivatives of ketones and quinones, whether or not with other oxygen function Tax rebate rate:9.0% Supervision conditions:none VAT:17.0% MFN tariff:5.5% General tariff:30.0%

Frequently Asked Questions

What is the CAS number of 2-Chloro-3',4'-dihydroxyacetophenone?

The CAS number of 2-Chloro-3',4'-dihydroxyacetophenone is 99-40-1.

What are the molecular formula and molecular weight of 2-Chloro-3',4'-dihydroxyacetophenone?

2-Chloro-3',4'-dihydroxyacetophenone has molecular formula C8H7ClO3 and molecular weight 186.592 g/mol.

Is 2-Chloro-3',4'-dihydroxyacetophenone hazardous?

2-Chloro-3',4'-dihydroxyacetophenone has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.

What are the upstream and downstream products of 2-Chloro-3',4'-dihydroxyacetophenone?

For 2-Chloro-3',4'-dihydroxyacetophenone, Upstream Products: Catechol, Chloroacetyl chloride, Chloroacetic acid; Downstream Products: 2-Chloro-3',4'-bis(pivaloyloxy)acetophenone.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "2-Chloro-3',4'-dihydroxyacetophenone (CAS 99-40-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-26501-0 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.