2-Bromo-2',5'-dimethoxyacetophenone

Also known as: 1,4-Dimethoxy-2-(bromoacetyl)benzene, 2,5-dimethoxyphenacyl bromide, 2-bromo-1-(2,5-dimethoxyphenyl)ethanone, Ethanone, 2-bromo-1-(2,5-dimethoxyphenyl)-, bromomethyl 2,5-dimethoxyphenyl ketone, α-Bromo-2',5'-dimethoxy acetophenone, α-Bromo-2',5'-dimethoxyacetophenone

2-Bromo-2',5'-dimethoxyacetophenone (CAS 1204-21-3) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C10H11BrO3 and a molecular weight of 259.096 g/mol. Key properties include a melting point of 83-85 °C(lit.), a boiling point of 323.1±27.0 °C at 760 mmHg, a density of 1.4±0.1 g/cm3 and a flash point of 149.2±23.7 °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.: 1204-21-3
Jingsj CID: J-16492-1
Molecular Formula: C₁₀H₁₁BrO₃
Molecular Weight: 259.096 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	83-85 °C(lit.)
Boiling Point	323.1±27.0 °C at 760 mmHg
Density	1.4±0.1 g/cm3
Flash Point	149.2±23.7 °C
Exact Mass	257.989136
PSA	35.53000
LogP	2.63
Vapor Pressure	0.0±0.7 mmHg at 25°C
Refractive Index	1.542

GHS Safety & Compliance

Irritant / Environmental HazardSignal word: Warning

H315 — Causes skin irritation
H319 — Causes serious eye irritation
H335 — May cause respiratory irritation
H400 — Very toxic to aquatic life

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-Bromo-2',5'-dimethoxyacetophenone?

The CAS number of 2-Bromo-2',5'-dimethoxyacetophenone is 1204-21-3.

What are the molecular formula and molecular weight of 2-Bromo-2',5'-dimethoxyacetophenone?

2-Bromo-2',5'-dimethoxyacetophenone has molecular formula C10H11BrO3 and molecular weight 259.096 g/mol.

Is 2-Bromo-2',5'-dimethoxyacetophenone hazardous?

2-Bromo-2',5'-dimethoxyacetophenone 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-Bromo-2',5'-dimethoxyacetophenone?

For 2-Bromo-2',5'-dimethoxyacetophenone, Upstream Products: 1-(2,5-Dimethoxyphenyl)ethanone, Bromoacetyl bromide, 1,4-Dimethoxybenzene; Downstream Products: Desglymidodrine, 2,5-Dimethoxybenzoylacetonitrile, 4-(2,5-dimethoxyphenyl)-1,3-thiazol-2-amine.

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-Bromo-2',5'-dimethoxyacetophenone (CAS 1204-21-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-16492-1 (accessed 2026-11-09).

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