O , O- diethyldithiophosphate

Structural formula
General
Surname	O , O- diethyldithiophosphate
other names	Dithiophosphoric acid O , O diethyl ester DEPA
Molecular formula	C 4 H 11 O 2 PS 2
Brief description	colorless liquid with an unpleasant odor
External identifiers / databases
CAS number 298-06-6 EC number 206-055-9 ECHA InfoCard 100.005.506 PubChem 9274 Wikidata Q309536
properties
Molar mass	186.23 g mol −1
Physical state	liquid
density	1.17 g cm −3 (20 ° C)
boiling point	105-108 (20 hPa)
Vapor pressure	0.66 hPa (57 ° C) mbar (° C)
solubility	soluble in water (330 g l −1 at 25 ° C)
Refractive index	1.512 (20 ° C, 589 nm)
safety instructions
GHS labeling of hazardous substances danger H and P phrases H: 302-332-314-400 P: 273-280-301 + 330 + 331-305 + 351 + 338-304 + 340
Toxicological data	1470 mg kg −1 ( LD 50 ,  rat ,  oral )
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . Refractive index: Na-D line , 20 ° C

O , O -diethyldithiophosphate is a chemical compound from the group of thiophosphoric acid esters .

Extraction and presentation

O , O -diethyldithiophosphate can be obtained by reacting ethanol with phosphorus (V) sulfide .

${\displaystyle \mathrm {4\ C_{2}H_{5}OH+P_{2}S_{5}\longrightarrow 2\ (C_{2}H_{5}O)_{2}P(S)SH+H_{2}S} }$

properties

O , O -diethyldithiophosphate is a colorless liquid with an unpleasant odor that is soluble in water.

use

O , O -Diethyldithiophosphat is useful as an intermediate for the preparation of insecticides such as Chlormephos , ethion or phorate used.

Web links

• EPA: IUCLID data set O , O -diethyl dithiophosphate (PDF; 617 kB)

Individual evidence

1. ↑ ^{a b c d e f g h i j k} data sheet O, O-Diethyldithiophosphat (PDF) from Merck , accessed on June 14, 2012.
2. ↑ Patent application EP0036485B1 : Process for converting alcohols and / or phenols with phosphorus pentasulphide. Registered on February 17, 1981 , published on May 6, 1983 , applicant: Höchst, inventor: Werner Krause, Jürgen Grosse, Werner Klose. ‌
3. ↑ Thomas A. Unger: Pesticide Synthesis Handbook . Elsevier, 1996, ISBN 978-0-8155-1401-5 , pp. 362 ( limited preview in Google Book search).