(2-Hydroxyethyl)triphenylphosphonium bromide

Also known as: (2-Hydroxyethyl)triphenylphosphonium bromide 97%, (2-Hydroxyethyl)triphenylphosphonium bromide, 97%, (2-Hydroxyethyl)triphenylphosphonium bromide, 98+%, 2-(Triphenylphosphonium)ethanol bromide, 2-hydroxyethyl(triphenyl)phosphanium, 2-hydroxyethyl(triphenyl)phosphanium bromide, Phosphonium,(2-hydroxyethyl)triphenyl-, bromide (1:1)

(2-Hydroxyethyl)triphenylphosphonium bromide (CAS 7237-34-5) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C20H20BrOP and a molecular weight of 387.25000 g/mol. Key properties include a melting point of 217-219 °C(lit.), a boiling point of 499.5ºC at 760 mmHg, a density of 1.26g/cm3 and a flash point of 255.9ºC. 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.: 7237-34-5
Jingsj CID: J-9105-4
Molecular Formula: C₂₀H₂₀BrOP
Molecular Weight: 387.25000 g/mol
Category: Aromatic Hydrocarbons
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	217-219 °C(lit.)
Boiling Point	499.5ºC at 760 mmHg
Density	1.26g/cm3
Flash Point	255.9ºC
Exact Mass	386.04400
PSA	33.82000
Refractive Index	1.591

GHS Safety & Compliance

IrritantSignal word: Warning

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

Frequently Asked Questions

What is the CAS number of (2-Hydroxyethyl)triphenylphosphonium bromide?

The CAS number of (2-Hydroxyethyl)triphenylphosphonium bromide is 7237-34-5.

What are the molecular formula and molecular weight of (2-Hydroxyethyl)triphenylphosphonium bromide?

(2-Hydroxyethyl)triphenylphosphonium bromide has molecular formula C20H20BrOP and molecular weight 387.25000 g/mol.

Is (2-Hydroxyethyl)triphenylphosphonium bromide hazardous?

(2-Hydroxyethyl)triphenylphosphonium bromide 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-Hydroxyethyl)triphenylphosphonium bromide?

For (2-Hydroxyethyl)triphenylphosphonium bromide, Upstream Products: Triphenylphosphine, 2-Bromoethanol, Vinyltriphenylphosphonium bromide; Downstream Products: Vinyltriphenylphosphonium bromide, (E)-pent-2-en-1-ol, Cinnamyl alcohol.

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-Hydroxyethyl)triphenylphosphonium bromide (CAS 7237-34-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-9105-4 (accessed 2026-11-09).

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