Triphenyl phosphate

Description

Triphenyl phosphate · CAS 115-86-6 · C18H15O4P. UNII YZE19Z66EA. Boiling Point: 473 °F at 11 mmHg (NTP, 1992); Boiling Point: BP: 245 °C at 11 mm Hg; Boiling Point: 370 °C.

Identification

CAS Registry Number	115-86-6
PubChem CID	8289
Molecular formula	C18H15O4P
IUPAC name	triphenyl phosphate
UNII (FDA)	YZE19Z66EA

Computed Descriptors

Molecular Weight	326.3
XLogP3	4.6
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	4
Rotatable Bond Count	6
Exact Mass	326.07079595
Monoisotopic Mass	326.07079595
Topological Polar Surface Area	44.8
Heavy Atom Count	23
Formal Charge	0

Physical & Chemical Properties

Boiling Point	473 °F at 11 mmHg (NTP, 1992)
Boiling Point	BP: 245 °C at 11 mm Hg
Boiling Point	370 °C
Boiling Point	473 °F at 11 mmHg
Boiling Point	776 °F
Melting Point	122 to 124 °F (NTP, 1992)
Melting Point	49.39 °C
Melting Point	49-50 °C
Melting Point	122-124 °F
Melting Point	120 °F

Physical description & handling notes

• Triphenyl phosphate appears as colorless crystals. (NTP, 1992)
• Other Solid; Dry Powder; CBI; Dry Powder; Liquid; Liquid
• Colorless, crystalline powder with a phenol-like odor; [NIOSH]
• COLOURLESS CRYSTALLINE POWDER WITH CHARACTERISTIC ODOUR.
• Colorless, crystalline powder with a phenol-like odor.
• Crystals from ligroin; prisms from alcohol; needles from diethyl ether

Regulatory Status

Regulatory & Food Contact	FDA Inventory of Food Contact Substances Listed in 21 CFR: FCS CIR / INCI: Cosmetic ingredients (Triphenyl Phosphate) -> CIR (Cosmetic Ingredient Review)
GHS notification summary	0.6% (9 / 1488)

GHS Hazard Classification

GHS notification summary	0.6% (9 / 1488)
Reported hazard statements	H400 (83.4%), H410 (86%), H411 (18.7%), H303, H320

Documented Uses

• CIR ingredient: Triphenyl Phosphate
• Used as a plasticizer, fire-retardant, and substitute for camphor in celluloid; also used in lubricating oils and hydraulic fluids; [ACGIH]
• Noncombustible substitute for camphor in celluloid; rendering acetylcellulose, nitrocellulose, airplane "dope", etc., stable and fireproof; impregnating roofing paper; plasticizer in lacquers and varnishes.
• Fire-retarding agent, plasticizer for cellulose acetate and nitrocellulose.
• /Triphenyl phosphate/ has been used as a plasticizer in automobile upholstery, as a fireproofing agent, as a noncombustible substitute for camphor in celluloid, and for impregnating roofing paper. Triphenyl phosphate also has been found as one component of lubricating oil and hydraulic fluids.
• An early application was as a flame retardant for cellulose acetate safety film. It is also used in cellulose nitrate, various coatings, triacetate film and sheet, and rigid urethane foam. It has been used as a flame-retardant additive for engineering thermoplastics such as polyphenylene oxide-high impact polystyrene and ABS-polycarbonate blends.

Synonyms

TRIPHENYL PHOSPHATE; 115-86-6; Triphenylphosphate; Phosphoric acid, triphenyl ester; Disflamoll TP; Celluflex TPP; Phosflex TPP; Triphenoxyphosphine oxide; Trifenylfosfat; Phenyl phosphate ((PhO)3PO); DTXSID1021952; YZE19Z66EA; NSC-57868; Triphenyl phosphoric acid ester; DTXCID201952; CHEBI:35033

Frequently Asked Questions

What are the CAS number and molecular formula of Triphenyl phosphate?

CAS 115-86-6; molecular formula C18H15O4P; molecular weight — g/mol.

What other names is Triphenyl phosphate known by?

TRIPHENYL PHOSPHATE, 115-86-6, Triphenylphosphate, Phosphoric acid, triphenyl ester, Disflamoll TP, Celluflex TPP.

What is the regulatory status of Triphenyl phosphate?

Documented regulatory listings: FDA Inventory of Food Contact Substances Listed in 21 CFR: FCS; CIR / INCI: Cosmetic ingredients (Triphenyl Phosphate) -> CIR (Cosmetic Ingredient Review).

Is Triphenyl phosphate classified as hazardous?

0.6% of GHS notifications report no hazard classification (9 of 1488).

What are the key physical properties of Triphenyl phosphate?

Boiling Point: 473 °F at 11 mmHg (NTP, 1992); Boiling Point: BP: 245 °C at 11 mm Hg; Boiling Point: 370 °C; Boiling Point: 473 °F at 11 mmHg.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.