2,2-dichloropropionic acid

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Structural formula
Structural formula of 2,2-dichloropropionic acid
General
Surname 2,2-dichloropropionic acid
other names
  • 2,2-DPA
  • Dalapon
Molecular formula C 3 H 4 Cl 2 O 2
Brief description

flammable, colorless liquid

External identifiers / databases
CAS number
EC number 200-923-0
ECHA InfoCard 100,000,840
PubChem 6418
ChemSpider 6178
Wikidata Q3012266
properties
Molar mass 142.97 g mol −1
Physical state

liquid

density

1.4014 g cm −3 (20 ° C)

Melting point

20 ° C

boiling point

190 ° C

Vapor pressure

0.25 h Pa (20 ° C)

solubility

Easily soluble in water (500 g l −1 at 20 ° C)

safety instructions
GHS hazard labeling from  Regulation (EC) No. 1272/2008 (CLP) , expanded if necessary
05 - Corrosive

danger

H and P phrases H: 315-318-412
P: 273-280-305 + 351 + 338
Toxicological data
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

The 2,2-dichloropropionic acid ( 2.2-DPA for short ) is an organic - chemical compound from the group of chlorinated carboxylic acids . In her case, the two hydrogen atoms on the α-C atom of propionic acid are replaced by chlorine atoms.

use

2,2-DPA was approved as a herbicide in Germany until 1994. It has a selective effect and was mainly used against couch grass, grasses in the forest, reeds , cane grass , water swaths , cattails , sedges and rushes.

In 2002, the EU Commission decided not to include Dalapon in the list of permitted active ingredients in pesticides . In Germany, Austria and Switzerland, no pesticides with this active ingredient are permitted.

Individual evidence

  1. ↑ a b c d e f g Entry on 2,2-dichloropropionic acid in the GESTIS substance database of the IFA , accessed on August 8, 2013(JavaScript required) .
  2. ↑ Entry on 2,2-dichloropropionic acid in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on February 1, 2016. Manufacturers or distributors can expand the harmonized classification and labeling .
  3. ↑ Datasheet Dalapon at Sigma-Aldrich , accessed on May 20, 2017 ( PDF ).
  4. ↑ Dalapon on EXTOXNET
  5. ↑ Gaines, T. et al. in foundation. Appl. Toxicol. 1986, 7, p. 299.
  6. ↑ Kenaga, EE et al. in Residue Rev. 1974, 53, pp. 109-151.
  7. ↑ Obligatory care products (PDF; 96 kB)
  8. ^ Müfit Bahadir, Harun Parlar, Michael Spiteller: Springer Umweltlexikon . Springer DE, 2000, ISBN 3-642-56998-6 , pp. 293 ( limited preview in Google Book search).
  9. ↑ Regulation (EC) No. 2076/2002 of the Commission of November 20, 2002 (PDF) extending the deadline according to Article 8 (2) of Council Directive 91/414 / EEC and on the non-inclusion of certain active substances in Annex I of this Directive and the revocation of the approval of plant protection products with these active substances.
  10. ↑ General Directorate Health and Food Safety of the European Commission: Entry on Dalapon in the EU pesticide database ; Entry in the national registers of plant protection products in Switzerland , Austria and Germany ; Retrieved February 19, 2016.