Skip to main content
Jingsj
.mol.sdf

Ethidium bromide

Also known as: EtBr, Homidium bromide, 3,8-Diamino-5-ethyl-6-phenylphenanthridinium bromide, 3,8-Diamino-5-ethyl-6-phenylphenanthridin-5-ium bromide, 2,7-Diamino-9-phenylphenanthridine ethobromide, Dromilac, Phenanthridinium, 3,8-diamino-5-ethyl-6-phenyl-, bromide (1:1)

Ethidium bromide (CAS 1239-45-8) is a compound in the Organohalogen Compounds category listed in the Jingsj chemical database. It has the molecular formula C21H20BrN3 and a molecular weight of 394.308 g/mol. Key properties include a melting point of 260-262 °C (dec.)(lit.) and a flash point of >100°C. It is classified under GHS with signal word Danger and hazard statements H302 — Harmful if swallowed, H330 — Fatal if inhaled and H341 — Suspected of causing genetic defects. No supplier offers are currently listed; request a quote. Record last updated Nov 3, 2026.

CAS No.
1239-45-8
Jingsj CID
J-16202-7
Molecular Formula
C21H20BrN3
Molecular Weight
394.308 g/mol
Category
Organohalogen Compounds
Last updated
11/3/2026
Request MSDS / TDS

No offers for this compound yet.

Request a quote

Physicochemical Properties

Melting Point260-262 °C (dec.)(lit.)
Flash Point>100°C
Exact Mass393.084045
PSA55.92000
LogP2.29820
Refractive Index1.4575 (20ºC)
Additional Property40 g/L (25 ºC)

GHS Safety & Compliance

Acute Toxicity / Health HazardSignal word: Danger
  • H302 — Harmful if swallowed
  • H330 — Fatal if inhaled
  • H341 — Suspected of causing genetic defects

Activity & Biological Data

Additional Information[1]. P Stevenson, et al. Comparison of isometamidium chloride and homidium bromide as prophylactic drugs for trypanosomiasis in cattle at Nguruman, Kenya. Acta Trop. 1995 May;59(2):77-84. [2]. Sabnis, Ram Wasudeo (2010). Handbook of Biological Dyes and Stains: Synthesis and Industrial Application. Hoboken, NJ: Wiley. ISBN 978-0-470-40753-0.

Customs & Trade Information

HS Code2933990090
Summary2933990090. heterocyclic compounds with nitrogen hetero-atom(s) only. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

Frequently Asked Questions

What is the CAS number of Ethidium bromide?

The CAS number of Ethidium bromide is 1239-45-8.

What are the molecular formula and molecular weight of Ethidium bromide?

Ethidium bromide has molecular formula C21H20BrN3 and molecular weight 394.308 g/mol.

Is Ethidium bromide hazardous?

Ethidium bromide has GHS signal word Danger and hazard statements H302 — Harmful if swallowed; H330 — Fatal if inhaled; H341 — Suspected of causing genetic defects.

What are the upstream and downstream products of Ethidium bromide?

For Ethidium bromide, Upstream Products: 3,8-DI-(ETHOXYCARBONYLAMINO)-6-PHENYLPHENANTHRIDINE, Benzidine, Biphenyl; Downstream Products: Dihydroethidium.

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

Last updated:

How to cite: Jingsj. "Ethidium bromide (CAS 1239-45-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-16202-7 (accessed 2026-11-09).

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