磷酸三(2-乙基己基)酯

Description

tris(2-ethylhexyl) phosphate · CAS 78-42-2 · C24H51O4P. UNII BQC0BKB72S. Boiling Point: at 0.7kPa: 220 °C; Boiling Point: 226.9 °C @760 [mm Hg]; Melting Point: -94 °F (NTP, 1992).

Identification

CAS Registry Number	78-42-2
PubChem CID	6537
Molecular formula	C24H51O4P
IUPAC name	tris(2-ethylhexyl) phosphate
UNII (FDA)	BQC0BKB72S

Computed Descriptors

Molecular Weight	434.6
XLogP3	8.9
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	4
Rotatable Bond Count	21
Exact Mass	434.35249710
Monoisotopic Mass	434.35249710
Topological Polar Surface Area	44.8
Heavy Atom Count	29
Formal Charge	0

Physical & Chemical Properties

Boiling Point	at 0.7kPa: 220 °C
Boiling Point	226.9 °C @760 [mm Hg]
Melting Point	-94 °F (NTP, 1992)
Melting Point	-74 °C
Flash Point	305 °F (NTP, 1992)
Flash Point	170 °C
Density	0.9077 @25 °C
Vapor Pressure	1.9 mmHg at 392 °F (NTP, 1992)
Vapor Pressure	0.03 [mm Hg] @20 °C
LogP	4.23

Physical description & handling notes

• Tris(2-ethylhexyl)phosphate is a clear colorless to pale yellow liquid with a slight sharp odor. (NTP, 1992)
• Other Solid; Liquid
• COLOURLESS VISCOUS LIQUID.
• 374 to 451 °F at 760 mmHg (decomposes) (NTP, 1992)
• less than 1 mg/mL at 64 °F (NTP, 1992)
• Solubility in water at 20 °C: none

Regulatory Status

Regulatory & Food Contact	FDA Inventory of Food Contact Substances Listed in 21 CFR: FCS
GHS notification summary	52.7% (260 / 493)

GHS Hazard Classification

GHS notification summary	52.7% (260 / 493)
Reported hazard statements	H315 (42%), H319 (36.7%), H400, H410

Documented Uses

• Processing aids, not otherwise listed
• Processing aids not otherwise specified
• 2023: 5,000,000 - <10,000,000 lb
• 2022: 5,000,000 - <10,000,000 lb
• 2021: 5,000,000 - <10,000,000 lb
• 2020: 1,000,000 - <5,000,000 lb

Synonyms

Tris(2-ethylhexyl) phosphate; 78-42-2; Tris(2-ethylhexyl)phosphate; Tri(2-ethylhexyl) phosphate; Phosphoric acid, tris(2-ethylhexyl) ester; 2-Ethyl-1-hexanol phosphate; TEHP; DTXSID0021414; BQC0BKB72S; NSC-407921; DTXCID801414; RefChem:191857; 201-116-6; Tris(2-ethylhexy)phosphate; NSC 407921; C24H51O4P

Frequently Asked Questions

What are the CAS number and molecular formula of tris(2-ethylhexyl) phosphate?

CAS 78-42-2; molecular formula C24H51O4P; molecular weight — g/mol.

What other names is tris(2-ethylhexyl) phosphate known by?

Tris(2-ethylhexyl) phosphate, 78-42-2, Tris(2-ethylhexyl)phosphate, Tri(2-ethylhexyl) phosphate, Phosphoric acid, tris(2-ethylhexyl) ester, 2-Ethyl-1-hexanol phosphate.

What is the regulatory status of tris(2-ethylhexyl) phosphate?

Documented regulatory listings: FDA Inventory of Food Contact Substances Listed in 21 CFR: FCS.

Is tris(2-ethylhexyl) phosphate classified as hazardous?

52.7% of GHS notifications report no hazard classification (260 of 493).

What are the key physical properties of tris(2-ethylhexyl) phosphate?

Boiling Point: at 0.7kPa: 220 °C; Boiling Point: 226.9 °C @760 [mm Hg]; Melting Point: -94 °F (NTP, 1992); Melting Point: -74 °C.

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.