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Acid, base and phase-transfer catalysts

Phosphonium, bromide, (E)-

Also known as Triphenyl(prop-1-en-1-yl)phosphoniumbromide, Triphenyl(prop-1-en-1-yl)phosphonium bromide

CAS 28691-76-1Formula C21H20BrPMolar mass 383.27 g/mol
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Phosphonium, bromide, (E)- chemical structure, C21H20BrP, CAS 28691-76-1
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
28691-76-1
Formula
C21H20BrP
Molar mass
383.27 g/mol
HS code
293149
Category
Acid, base and phase-transfer catalysts

What is Phosphonium, bromide, (E)-?

Plain description, key identifiers and synonyms

Phosphonium, bromide, (E)- is a chemical substance with the molecular formula C21H20BrP and a molar mass of 383.27 g/mol. Its CAS registry number is 28691-76-1. The IUPAC name is triphenyl-[(E)-prop-1-enyl]phosphanium bromide.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
triphenyl-[(E)-prop-1-enyl]phosphanium bromide
CAS number
28691-76-1Other or deprecated CAS: 7301-94-2
Molecular formula
C21H20BrP
InChIKey
DEQBDPCMPVARSX-QMUAEARGSA-M
InChI
InChI=1S/C21H20P.BrH/c1-2-18-22(19-12-6-3-7-13-19,20-14-8-4-9-15-20)21-16-10-5-11-17-21;/h2-18H,1H3;1H/q+1;/p-1/b18-2+;
Canonical SMILES
CC=C[P+](c1ccccc1)(c1ccccc1)c1ccccc1.[Br-]
Isomeric SMILES
C/C=C/[P+](C1=CC=CC=C1)(C2=CC=CC=C2)C3=CC=CC=C3.[Br-]

Synonyms

  • Triphenyl(prop-1-en-1-yl)phosphoniumbromide
  • Triphenyl(prop-1-en-1-yl)phosphonium bromide

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
383.27 g/molcalc.
Exact mass
382.0486 Dacalc.
LogP (octanol/water)
1.52calc.
Topological polar surface area
0 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
0calc.
Rotatable bonds
4calc.
Heavy atoms
23calc.
Rings
3calc.
Aromatic rings
3calc.
Fraction sp3 carbons
0.05calc.
Formal charge
0calc.
Stereocentres
0calc.
Components
2calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, c1ccc(P(c2ccccc2)c2ccccc2)cc1

c1ccc(P(c2ccccc2)c2ccccc2)cc1

3 rings, 19 atoms, the Triphenylphosphine ring system.

1,528 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Phosphonium, bromide, (E)- suppliers

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Phosphonium, bromide, (E)- price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Applications are not documented for this substance yet. Suppliers often describe uses on their product pages, linked in the suppliers list above.

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Phosphonium, bromide, (E)- is traded under.

HS 2931.49Indicative HS code

Non-halogenated organo-phosphorous derivatives, other

World exports in 2024
$3.44B
−6.5% vs 2023, imports $3.07B
2022 to 2024
Top exporters
  1. China54.9%
  2. United States25.4%
  3. Germany5.1%
Top importers
  1. United States20.9%
  2. Argentina14.9%
  3. Brazil14.3%
Reported customs values in USD, not prices.Full trade data

The HS code shown for Phosphonium, bromide, (E)- is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Phosphonium, bromide, (E)-, based on the data on this page

What is Phosphonium, bromide, (E)-?

Phosphonium, bromide, (E)- is a chemical substance with the molecular formula C21H20BrP and a molar mass of 383.27 g/mol. Its CAS registry number is 28691-76-1. The IUPAC name is triphenyl-[(E)-prop-1-enyl]phosphanium bromide.

What is the CAS number of Phosphonium, bromide, (E)-?

The CAS registry number of Phosphonium, bromide, (E)- is 28691-76-1. Other or deprecated CAS numbers: 7301-94-2.

What is the molecular formula and weight of Phosphonium, bromide, (E)-?

The molecular formula of Phosphonium, bromide, (E)- is C21H20BrP and its molar mass is 383.27 g/mol.

Is Phosphonium, bromide, (E)- hazardous?

No GHS hazard classification for Phosphonium, bromide, (E)- is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

What is the HS code of Phosphonium, bromide, (E)-?

Phosphonium, bromide, (E)- is usually classified under HS code 293149 (Non-halogenated organo-phosphorous derivatives, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Phosphonium, bromide, (E)-?

Post a free request on CompoundList and suppliers of Phosphonium, bromide, (E)- will send you quotes. Your contact details stay private until you accept a quote.

What is the price of Phosphonium, bromide, (E)-?

Suppliers quote Phosphonium, bromide, (E)- on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Phosphonium, bromide, (E)-

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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