Bis(2-ethylhexyl) phthalate

  • DEHP
  • Diethylhexylphthalate
  • Di -sec- octyl phthalate
  • Phthalic acid -bis- 2-ethylhexyl

Colorless, neutral, oily and odorless liquid

Liquid

0.99 g · cm -3

About -50 ° C

385 ° C.

Insoluble in water < 0.1 g · l-1 soluble in oils and in many organic solvents

1.4853 (20 ° C)

Risk

10 mg · m-3

Template: Infobox chemical / molecular formula search available

Bis (2- ethylhexyl) phthalate ( also phthalate ( DEHP) ) is one of the most important phthalate plasticizers, the market share in 2010 was the global plasticizer consumption at just under 54 %.

Problem

If this material is incorporated into polymeric materials, they are more elastic and supple. DEHP shall in no chemical compound, and may therefore, for example, to escape from plastics with time and, for example, to migrate from the food packaging in the food.

As a substitute for the production of PVC products diisononyl phthalate is used. After studies at the University of Erlangen, the average intake of DEHP substantially exceeds the limit set by the European Commission. This can have negative health effects on testes, kidneys and liver.

Since October 28, 2008 DEHP has led to the so-called "candidate list" of ECHA. Is DEHP contained in an article, there is duty to provide information to the customer. It is already prohibited from using DEHP in toys and childcare articles, because the substance is listed in Annex 1 of the Commodities Regulation.

In the latest draft of the Directive 2002/95/EC RoHS DEHP is added to the banned substances. In the EU Regulation No 143/2011 of 17 February 2011 is bis (2- ethylhexyl) phthalate (DEHP ) is classified as toxic for reproduction and January 21, 2015 set as the date from which on the marketing and use of the substance without authorization is prohibited.

Use

DEHP is often used as:

  • Plasticizer for PVC plastics
  • Additive in paints, cosmetics and pesticides

Isomerism

A structural isomer of DEHP is dioctyl phthalate (DOP). It is often overlooked that DEHP per a stereocenter has at each branch point of the two 2- ethylhexyl. Thus, there are three DEHP - stereoisomers:

  • (R, R)- DEHP
  • (S, S) and DEHP
  • Meso- DEHP.

In technology, DEHP is used virtually exclusively as a mixture of three stereoisomers. In general, these stereoisomers have different physiological and therefore toxicological properties.

CAS registry number PubChem Dangerous Substances Directive (67/548/EEC) European Chemicals Agency CRC Handbook of Chemistry and Physics European Journal of Clinical Pharmacology Digital Object Identifier
126973
de