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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 78474Generated: October 23, 2026

Ethyltriphenylphosphonium iodide

ETPPI · EPJ · [Ph3EP]I · Hishicolin ETPPI · Ethyl triphenyle · Triphenylethyl iodide · phenylphosphoniumethyliodide · ethyltriphenylphosphine iodide

https://huagongshe.com/en/chemical/78474

Ethyltriphenylphosphonium iodide molecular structure

Identifiers & Physical Properties

CAS No.4736-60-1
Molecular formulaC20H20P.I
Average molar mass418.2 g/mol
Monoisotopic mass418.03473527 g/mol
SMILESCC[P+](c1ccccc1)(c1ccccc1)c1ccccc1.[I-]
InChIKeySLAFUPJSGFVWPP-UHFFFAOYSA-M
PubChem CID78474
EC No.225-245-2
DTXSIDDTXSID1052117

Chemical & Physical Properties

Topological polar surface area0
Hydrogen bond donors0
Hydrogen bond acceptors1
Rotatable bonds4
Heavy atoms22
Formal charge0
Complexity247
Physical DescriptionDry Powder
Melting point164-168 °C(lit.)
Boiling point337 °C
Density1.500
Vapor pressure0Pa at 25℃
Flash point226 °C
Storage conditionsKeep in dark place,Inert atmosphere,Room temperature
SolubilityAcetone, Chloroform, Dichloromethane, Methanolslightly soluble
Physical statePowder
ColorYellow
SensitivityLight Sensitive & Hygroscopic
BRN3659323
InChI1S/C20H20P.HI/c1-2-21(18-12-6-3-7-13-18,19-14-8-4-9-15-19)20-16-10-5-11-17-20/h3-17H,2H2,1H31H/q+1/p-1
InChIKeySLAFUPJSGFVWPP-UHFFFAOYSA-M
SMILES[I-].CC[P+](c1ccccc1)(c2ccccc2)c3ccccc3
LogP (partition coefficient)0.324
CAS DataBase Reference4736-60-1(CAS DataBase Reference)
FDA UNIIXXZ2V239JN
EPA Substance Registry SystemPhosphonium, ethyltriphenyl-, iodide (4736-60-1)
UNSPSC Code12352002
NACRESNA.22
GHS pictogramGHS06
Signal wordDanger
GHS hazard statementsH301-H319
GHS precautionary statementsP301+P310+P330-P305+P351+P338
Personal protective equipment (PPE)Eyeshields, Faceshields, Gloves, type P2 (EN 143) respirator cartridges
Hazard symbolsT,Xn
Risk statements (R)25-36/38-21-36/37/38-20/21/22
Safety statements (S)45-36/37/39-28A-26-36
UN transport numberUN 2811 6.1/PG 3
Water hazard class (WGK)3
RTECS numberTA2312000
F3-8-10
TSCA inventory statusTSCA listed
Hazard class6.1Acute Tox. 3 OralEye Irrit. 2
Packing groupIII
Customs code29310095
Storage class6.1C - Combustible acute toxic Cat.3toxic compounds or compounds which causing chronic effects
REACH registrationsActive
Limited quantities5.0 kg (11 lbs) (solid)
Excepted quantitiesMax Inner Pack (30g or 30ml) and Max Outer Pack (1Kg or 1L)

Safety & Regulations

GHS classificationThis chemical does not meet GHS hazard criteria for 1.3% (5 of 381) of reports.DangerH300 (26.8%): Fatal if swallowed [Danger Acute toxicity, oral]P261, P264, P264+P265, P270, P271, P273, P280, P301+P316, P302+P352, P304+P340, P305+P351+P338, P305+P354+P338, P317, P319, P321, P330, P332+P317, P337+P317, P362+P364, P391, P403+P233, P405, and P501 (click each P-code to see the statement)Aggregated GHS information provided per 381 reports by companies from 16 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
Regulatory informationChemical: Phosphonium, ethyltriphenyl-, iodidePhosphonium, ethyltriphenyl-, iodide (1:1) is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Phosphonium, ethyltriphenyl-, iodide (1:1) are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)Status: Active Update: 04-08-2021 https://echa.europa.eu/registration-dossier/-/registered-dossier/21537Ethyltriphenylphosphonium iodide: Does not have an individual approval but may be used under an appropriate group standard
Hazard Classes and CategoriesAcute Tox. 2 (26.8%)
F3-8-10
Personal protective equipment (PPE)Eyeshields, Faceshields, Gloves, type P2 (EN 143) respirator cartridges
Water hazard class (WGK)3
TSCA inventory statusTSCA listed
RTECS numberTA2312000
UN transport numberUN 2811 6.1/PG 3
Customs code29310095
Risk statements (R)25-36/38-21-36/37/38-20/21/22
Signal wordDanger
GHS pictogramGHS06
Hazard symbolsT,Xn
Safety statements (S)45-36/37/39-28A-26-36
Hazard class6.1Acute Tox. 3 OralEye Irrit. 2
Storage class6.1C - Combustible acute toxic Cat.3toxic compounds or compounds which causing chronic effects
Packing groupIII
GHS hazard statementsH301-H319
Limited quantities5.0 kg (11 lbs) (solid)
Excepted quantitiesMax Inner Pack (30g or 30ml) and Max Outer Pack (1Kg or 1L)
REACH registrationsActive
GHS precautionary statementsP301+P310+P330-P305+P351+P338

Applications & Uses

Uses

Ethyltriphenylphosphonium iodide is involved in synthesis of diarylmethine derivatives, phosphonium salts, and bismuth(III) polynuclear halide complexes, asymmetric hydrogenation.

Uses

Ethyltriphenylphosphonium iodide is used as a Wittig reagent and phase transfer catalyst in organic synthesis. It can also be used in asymmetric hydrogenation and to make Bismuth(III) polynuclear complexes.