3,5-Dibromo-4-methoxybenzonitrile

Also known as: Bromoxynil-methyl ether, Bromoxynil-methyl, Bromoxynil methyl ether, Bromoxynil-methyl solution, 4-methoxy-3,5-dibromobenzonitrile, Benzonitrile, 3,5-dibromo-4-methoxy-, p-Anisonitrile, 3,5-dibromo-, 2,6-Dibromo-4-cyanoanisol

3,5-Dibromo-4-methoxybenzonitrile (CAS 3336-39-8) is a compound in the Ethers category listed in the Jingsj chemical database. It has the molecular formula C8H5Br2NO and a molecular weight of 290.939 g/mol. Key properties include a melting point of 115-117°C, a boiling point of 309.0±37.0 °C at 760 mmHg, a density of 2.0±0.1 g/cm3 and a flash point of 140.7±26.5 °C. It is classified under GHS with signal word Danger and hazard statements H301 — Toxic if swallowed, H317 — May cause an allergic skin reaction and H330 — Fatal if inhaled. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 3336-39-8
Jingsj CID: J-48340-9
Molecular Formula: C₈H₅Br₂NO
Molecular Weight: 290.939 g/mol
Category: Ethers
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	115-117°C
Boiling Point	309.0±37.0 °C at 760 mmHg
Density	2.0±0.1 g/cm3
Flash Point	140.7±26.5 °C
Exact Mass	288.873779
PSA	33.02000
LogP	2.39
Vapor Pressure	0.0±0.7 mmHg at 25°C
Refractive Index	1.633

GHS Safety & Compliance

Acute Toxicity / Health Hazard / Environmental HazardSignal word: Danger

H301 — Toxic if swallowed
H317 — May cause an allergic skin reaction
H330 — Fatal if inhaled
H410 — Very toxic to aquatic life with long lasting effects

Customs & Trade Information

HS Code	2926909090
Summary	HS:2926909090 other nitrile-function compounds VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:6.5% General tariff:30.0%

Frequently Asked Questions

What is the CAS number of 3,5-Dibromo-4-methoxybenzonitrile?

The CAS number of 3,5-Dibromo-4-methoxybenzonitrile is 3336-39-8.

What are the molecular formula and molecular weight of 3,5-Dibromo-4-methoxybenzonitrile?

3,5-Dibromo-4-methoxybenzonitrile has molecular formula C8H5Br2NO and molecular weight 290.939 g/mol.

Is 3,5-Dibromo-4-methoxybenzonitrile hazardous?

3,5-Dibromo-4-methoxybenzonitrile has GHS signal word Danger and hazard statements H301 — Toxic if swallowed; H317 — May cause an allergic skin reaction; H330 — Fatal if inhaled.

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. "3,5-Dibromo-4-methoxybenzonitrile (CAS 3336-39-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-48340-9 (accessed 2026-11-06).

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