4-Bromo-1,2-dimethylbenzene

Also known as: 4-Bromo-o-xylene, 1-Bromo-3,4-dimethylbenzene, 4-Bromo-ortho-xylene, Benzene, 4-bromo-1,2-dimethyl-

4-Bromo-1,2-dimethylbenzene (CAS 583-71-1) is a compound in the Solvents category listed in the Jingsj chemical database. It has the molecular formula C8H9Br and a molecular weight of 185.061 g/mol. Key properties include a melting point of −12-−10 °C, a boiling point of 213.9±9.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 85.8±13.1 °C. It is classified under GHS with signal word Warning and hazard statements H302 — Harmful if swallowed, H315 — Causes skin irritation and H319 — Causes serious eye irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 583-71-1
Jingsj CID: J-20038-4
Molecular Formula: C₈H₉Br
Molecular Weight: 185.061 g/mol
Category: Solvents
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	−12-−10 °C
Boiling Point	213.9±9.0 °C at 760 mmHg
Density	1.3±0.1 g/cm3
Flash Point	85.8±13.1 °C
Exact Mass	183.988754
LogP	3.91
Vapor Pressure	0.2±0.4 mmHg at 25°C
Refractive Index	1.544

GHS Safety & Compliance

Irritant / Environmental HazardSignal word: Warning

H302 — Harmful if swallowed
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	29036990

Frequently Asked Questions

What is the CAS number of 4-Bromo-1,2-dimethylbenzene?

The CAS number of 4-Bromo-1,2-dimethylbenzene is 583-71-1.

What are the molecular formula and molecular weight of 4-Bromo-1,2-dimethylbenzene?

4-Bromo-1,2-dimethylbenzene has molecular formula C8H9Br and molecular weight 185.061 g/mol.

Is 4-Bromo-1,2-dimethylbenzene hazardous?

4-Bromo-1,2-dimethylbenzene has GHS signal word Warning and hazard statements H302 — Harmful if swallowed; H315 — Causes skin irritation; H319 — Causes serious eye irritation.

What are the upstream and downstream products of 4-Bromo-1,2-dimethylbenzene?

For 4-Bromo-1,2-dimethylbenzene, Upstream Products: o-xylene, fluoromethane, 4-Bromotoluene; Downstream Products: 3,3',4,4'-TETRAMETHYLBIPHENYL, Methyl 3,4-dimethylbenzoate, 3,4-Dimethylphenylboronic acid.

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. "4-Bromo-1,2-dimethylbenzene (CAS 583-71-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-20038-4 (accessed 2026-11-09).

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