Trioctyl phosphine oxide

Structural formula
General
Surname	Trioctyl phosphine oxide
other names	TOPO Tri- n -octylphosphine oxide
Molecular formula	C 24 H 51 OP
Brief description	white, crystalline powder with a sweet smell
External identifiers / databases
CAS number 78-50-2 EC number 201-121-3 ECHA InfoCard 100.001.020 PubChem 65577 Wikidata Q138673
properties
Molar mass	386.65 g mol −1
Physical state	firmly
density	0.88 g cm −3 (15 ° C)
Melting point	48-53 ° C
boiling point	212 ° C (39.99 Pa )
solubility	very bad in water (<1 g l −1 at 20 ° C)
safety instructions
GHS labeling of hazardous substances Caution H and P phrases H: 319-411 P: 262-273-305 + 351 + 338
Toxicological data	2830 mg kg −1 ( LD 50 ,  rat ,  transdermal )
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Trioctylphosphine oxide , also known as trioctylphosphine oxide, is abbreviated as TOPO and is used as a high-boiling organic solvent , e.g. B. in the synthesis of cadmium selenide - semiconductor - nanocrystals .

Trioctylphosphine oxide can be made from phosphorus trichloride or from monophosphine .

See also

• Trioctylphosphine (C ₈ H ₁₇ ) ₃ P

Web links

• Use of TOPO in the production of light emitting diodes

Individual evidence

1. ↑ ^{a b c d e f g h} Data sheet trioctylphosphine oxide (PDF) from Merck , accessed on March 2, 2019.
2. ↑ External identifiers or database links for trioctylphosphine : CAS number: 4731-53-7, EC number: 225-234-2, ECHA InfoCard: 100.022.940 , PubChem : 20851 , ChemSpider : 19625 , Wikidata : Q7843112 .