Tributyltrithiophosphite

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Structural formula
Structural formula of tributyltrithiophosphite
General
Surname Tributyltrithiophosphite
other names
  • Merphos
  • Folex
Molecular formula C 12 H 27 PS 3
External identifiers / databases
CAS number 150-50-5
EC number 205-761-4
ECHA InfoCard 100.005.239
PubChem 9011
Wikidata Q17326638
properties
Molar mass 398.5 g mol −1
Physical state

liquid

density

1.02 g cm −3

Melting point

100 ° C

boiling point

115-134 ° C at 10.66 hPa

Vapor pressure

2.666 mPa (25 ° C)

solubility
  • slightly soluble in water
  • soluble in acetone, benzene, ethanol, hexane and xylene
safety instructions
GHS hazard labeling
no classification available
Toxicological data

910 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 .

Tributyltrithiophosphite is a chemical compound from the group of thiophosphoric acid esters , which was introduced by the Rhône-Poulenc . It is easily oxidized to Tribufos .

Extraction and presentation

Tribufos can be obtained by reacting phosphorus trichloride with the sodium salt of 1-butanethiol .

use

Tribufos is used as a defoliant in cotton cultivation.

Admission

Tributyltrithiophosphite is not approved as a crop protection agent in the European Union or Switzerland .

Individual evidence

  1. ↑ a b David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 90th edition. (Internet version: 2010), CRC Press / Taylor and Francis, Boca Raton, FL, Physical Constants of Organic Compounds, pp. 3-326.
  2. ↑ a b c Robert Krieger (Ed.): Hayes' Handbook of Pesticide Toxicology, Volume 1 . Elsevier, 1999, ISBN 978-0-12-374367-1 , pp. 772 ( limited preview in Google Book search).
  3. ↑ a b EPA: Test Plan S, S, S-Tributyl trithiophosphite
  4. ↑ a b Entry on Merphos in the Pesticide Properties DataBase (PPDB) of the University of Hertfordshire , accessed on June 11, 2014.
  5. ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
  6. ↑ Thomas A. Unger: Pesticide Synthesis Handbook . William Andrew, 1996, ISBN 0-8155-1853-6 , pp. 383 ( preview ).
  7. ↑ A. Niemann: A determination method for tributyltrithiophosphite (Merphos) in cottonseed . In: Fresenius' Journal for Analytical Chemistry . tape 198 , no. 2 , 1963, p. 205–205 , doi : 10.1007 / bf00479729 ( PDF ).
  8. ↑ General Directorate Health and Food Safety of the European Commission: Entry on Merphos (aka tributylphosphorotrithioite) in the EU pesticide database; Entry in the national directory of plant protection products in Switzerland ; Retrieved June 25, 2016.