C18H15OP
278.3 g/mol
Industrial ChemicalWarning
TRIPHENYLPHOSPHINE OXIDE
CAS791-28-6EC212-338-8
Category
Industrial Chemical
Compound Class
Aromatic
Primary Use
organophosphorus compound and reaction byproduct
Triphenylphosphine oxide is a colorless crystalline organophosphorus compound commonly encountered as a byproduct in reactions involving triphenylphosphine. It is one of the more prevalent phosphine oxides and is often viewed as a potentially useful waste material in organic synthesis.
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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Related Compounds
ReferenceSame Category
1,3-Diisopropoxybenzene
CAS79128-08-8
Chemical intermediate and research compound
ReferenceSame Category
N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine
CAS793-24-8
Antioxidant and antiozonant for rubber
ReferenceSame Category
2-Propenoic acid, octahydro-4,7-methano-1H-indenyl ester
CAS79637-74-4
acrylic ester monomer for polymerization
ReferenceSame Category
Dodecylbenzenesulfonyl azide
CAS79791-38-1
Sulfonyl azide foaming or blowing agent
Referencesame scaffold
(3-Bromophenyl)diphenylphosphine oxide
CAS10212-04-1
research compound
Referencesame scaffold
4-tert-Butyl-2-(diphenylphosphoryl)phenol
CAS60254-03-7
research compound
Safety Reference
Warning
H302Harmful if swallowed
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation
H412Harmful to aquatic life with long lasting effects
H371May cause damage to organs
H373May cause damage to organs through prolonged or repeated exposure
Customs Tariff Classification
The international HS code for TRIPHENYLPHOSPHINE OXIDE (CAS 791-28-6) is 2931.49.
HS code (international, 6-digit)
2931.49
EU CN code (8-digit)
2931 49 80
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
diphenylphosphorylbenzene
InChIKey
FIQMHBFVRAXMOP-UHFFFAOYSA-N
SMILES
C1=CC=C(C=C1)P(=O)(C2=CC=CC=C2)C3=CC=CC=C3
Synonyms (24)
- TPPO
- Orlistat USP Rc C; Alprostadil EP Impurity K
- (diphenylphosphoroso)benzene
- ALPROSTADIL IMPURITY K
- Orlistat Impurity 5
- Phosphine oxide, triphenyl-
- TRIPHENYLPHOSPHINE MONOXIDE
- TRIPHENYLPHOSPHINE OXIDE
- Triphenoxyphosphonate
- Triphenyl phosphorus oxide
- Triphenylphosphanoxid
- Triphenylphosphanoxide
- diphenylphosphorylbenzene
- triphenylphisphine oxide
- triphenylphosphane oxide
- triphenylphosphinoxide
- triphenylphospine oxide
- triphenyphosphine oxide
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