(2-Methoxy-2-oxoethyl)triphenylphosphonium bromide

Also known as: (Methoxycarbonylmethyl)triphenylphosphonium bromide, (Carbomethoxymethyl)triphenylphosphonium bromide, methyl (triphenylphosphonio)acetate bromide, Carbomethoxymethyl(triphenyl)phosphonium Bromide, Methoxycarbonylmethyl(triphenyl)phosphonium Bromide, Ph3PCH2CO2MeBr, CMMTPPB

(2-Methoxy-2-oxoethyl)triphenylphosphonium bromide (CAS 1779-58-4) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C21H20BrO2P and a molecular weight of 415.260 g/mol. Key property: a melting point of 165-170 °C (dec.)(lit.). 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.: 1779-58-4
Jingsj CID: J-12172-2
Molecular Formula: C₂₁H₂₀BrO₂P
Molecular Weight: 415.260 g/mol
Category: Aromatic Hydrocarbons
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	165-170 °C (dec.)(lit.)
Exact Mass	414.038422
PSA	39.89000
LogP	0.15750

GHS Safety & Compliance

IrritantSignal word: Warning

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

Customs & Trade Information

HS Code	2931900090
Summary	2931900090. other organo-inorganic compounds. VAT:17.0%. Tax rebate rate:13.0%. Supervision conditions:AB(certificate of inspection for goods inward,certificate of inspection for goods outward). MFN tariff:6.5%. General tariff:30.0%

Frequently Asked Questions

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

The CAS number of (2-Methoxy-2-oxoethyl)triphenylphosphonium bromide is 1779-58-4.

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

(2-Methoxy-2-oxoethyl)triphenylphosphonium bromide has molecular formula C21H20BrO2P and molecular weight 415.260 g/mol.

Is (2-Methoxy-2-oxoethyl)triphenylphosphonium bromide hazardous?

(2-Methoxy-2-oxoethyl)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-Methoxy-2-oxoethyl)triphenylphosphonium bromide?

For (2-Methoxy-2-oxoethyl)triphenylphosphonium bromide, Upstream Products: Methyl bromoacetate, Triphenylphosphine, 2,2-dibromo-1,3-diphenyl-1,3-propanedione; Downstream Products: Coumarin 6H, Methyltriphenylphosphonium bromide, 1,1,3-Trichloroacetone.

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-Methoxy-2-oxoethyl)triphenylphosphonium bromide (CAS 1779-58-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-12172-2 (accessed 2026-11-09).

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