tri-o-tolyl phosphate

Description

tri-o-tolyl phosphate · CAS 78-30-8 · C21H21O4P. UNII X8II18JD0A. Boiling Point: 410 °C; Boiling Point: 410 °C @760 [mm Hg]; Melting Point: 11 °C.

Identification

CAS Registry Number	78-30-8
PubChem CID	6527
Molecular formula	C21H21O4P
IUPAC name	tris(2-methylphenyl) phosphate
UNII (FDA)	X8II18JD0A

Computed Descriptors

Molecular Weight	368.4
XLogP3	6.1
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	4
Rotatable Bond Count	6
Exact Mass	368.11774614
Monoisotopic Mass	368.11774614
Topological Polar Surface Area	44.8
Heavy Atom Count	26
Formal Charge	0

Physical & Chemical Properties

Boiling Point	410 °C
Boiling Point	410 °C @760 [mm Hg]
Melting Point	11 °C
Melting Point	-22-(-)13 °F
Melting Point	52 °F
Flash Point	437 °F ( 225 °C) (Closed cup)
Flash Point	225 °C c.c.
Flash Point	437 °F
Density	1.1955 g/cu cm at 20 °C
Density	1.16

Physical description & handling notes

• Colorless to pale-yellow, odorless liquid or solid (below 52 degrees F). [NIOSH]
• COLOURLESS OR PALE YELLOW LIQUID.
• Colorless to pale-yellow, odorless liquid or solid (below 52 °F).
• Colorless or pale yellow liquid
• Practically odorless
• BP: approximately 410 °C with slight decomposition

Regulatory Status

GHS notification summary	0.3% (1 / 291)

GHS Hazard Classification

GHS notification summary	0.3% (1 / 291)
Reported hazard statements	H370, H411, H302 (41.2%), H400 (35.7%), H372, H373

Documented Uses

• Used as a flame retardant, plasticizer, lubricant, additive to gasoline and hydraulic fluids, and intermediate for pharmaceuticals. Also used in coatings and adhesives, in adhesives for air filter media, as a heat exchange medium, a waterproofing agent, an extraction solvent, and in solvent mixtures for resins; [ACGIH]
• As plasticizer in lacquers and varnishes.
• ... Flame retardent and plasticizer, in hot extrusion molding and bulk forming of plasticized polyvinyl chloride, in coatings and adhesives, as a gasoline additive to control pre-ignition, in hydraulic fluids, as a heat exchange medium, a synthetic lubricant, as a water proofing agent, as a component of adhesives for air filter media, an extraction solvent, an intermediate in the synthesis of pharmaceuticals, and in a solvent mixture for various resins.
• As additive to extreme pressure lubricants; as a non-flammable fluid in hydraulic systems; as plasticizer in lacquers and varnishes; as plasticizer in vinyl plastics manufacture; as flame retardant; as lead scavenger in gasoline; and as solvent for nitrocellulose, in cellulosic molding compositions.
• Aryl phosphates such as tricresyl phosphate ... or cresyl diphenyl phosphates ... when added in small percentages to the gasoline, combat misfires. /Aryl phosphates/
• Tricresyl phosphate (ortho-, meta- and para-isomers) is used in flexible PVC, cellulose nitrate, ethylcellulose coatings, and various rubbers. Typical applications are vinyl tarpaulins, mine conveyer belts, air ducts, cable insulation, and vinyl films ... usually used in blends with phthalates.

Synonyms

Tri-o-tolyl phosphate; TRI-O-CRESYL PHOSPHATE; 78-30-8; TOCP; Phosphoric acid, tris(2-methylphenyl) ester; o-Cresyl phosphate; Triorthocresyl phosphate; Phosflex 179C; Tris(o-tolyl) phosphate; Trojkrezylu fosforan; Tri-2-methylphenyl phosphate; Tris(o-cresyl)-phosphate; o-Trikresylphosphate; Tris(o-methylphenyl)phosphate; Phosphoric acid, tri-o-cresyl ester; Tris(o-tolyl)-phosphate

Frequently Asked Questions

What are the CAS number and molecular formula of tri-o-tolyl phosphate?

CAS 78-30-8; molecular formula C21H21O4P; molecular weight — g/mol.

What other names is tri-o-tolyl phosphate known by?

Tri-o-tolyl phosphate, TRI-O-CRESYL PHOSPHATE, 78-30-8, TOCP, Phosphoric acid, tris(2-methylphenyl) ester, o-Cresyl phosphate.

Is tri-o-tolyl phosphate classified as hazardous?

0.3% of GHS notifications report no hazard classification (1 of 291).

What are the key physical properties of tri-o-tolyl phosphate?

Boiling Point: 410 °C; Boiling Point: 410 °C @760 [mm Hg]; Melting Point: 11 °C; Melting Point: -22-(-)13 °F.

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.