Tris (2-ethylhexyl) phosphate
Structural formula | ||||||||||||||||
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General | ||||||||||||||||
Surname | Tris (2-ethylhexyl) phosphate | |||||||||||||||
other names |
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Molecular formula | C 24 H 51 O 4 P | |||||||||||||||
Brief description |
colorless, pungent smelling liquid |
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External identifiers / databases | ||||||||||||||||
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properties | ||||||||||||||||
Molar mass | 434.64 g mol −1 | |||||||||||||||
Physical state |
liquid |
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density |
0.92 g cm −3 (20 ° C) |
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Melting point |
<−70 ° C |
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boiling point |
280 ° C (decomposition) |
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Vapor pressure |
<0.01 hPa (20 ° C) |
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solubility |
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Refractive index |
1.441 (25 ° C) |
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safety instructions | ||||||||||||||||
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Toxicological data | ||||||||||||||||
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 |
Tris (2-ethylhexyl) phosphate ( TEHP ) is an organic chemical compound from the group of phosphoric acid esters (triakyl phosphates).
Occurrence
Since tris (2-ethylhexyl) phosphate dissolves very easily from the polymers , it occurs in house dust , among other things .
properties
Tris (2-ethylhexyl) phosphate is a colorless, slightly pungent smelling, viscous liquid. It has a viscosity of 15 mPas at 20 ° C.
use
Due to its properties (among other things, it is slightly biocidal ), tris (2-ethylhexyl) phosphate has a wide range of uses:
- as a plasticizer with excellent low temperature flexibility and flame retardant in polymers ( PVC , PUR , NBR and others)
- as a carrier material for pigments and dyes for coloring polymers
- as a component of cutting oils
- as a component of release agent preparations used in the metal industry
- as a solvent for hydrogen peroxide synthesis
safety instructions
When tris (2-ethylhexyl) phosphate is heated above its flash point of 170 ° C, its vapors can form explosive mixtures with air.
According to several studies, tris (2-ethylhexyl) phosphate has the highest bioaccumulation factor of all examined organophosphorus flame retardants.
Individual evidence
- ↑ a b c d e f g h i Entry on tris (2-ethylhexyl) phosphate in the GESTIS substance database of the IFA , accessed on January 10, 2017(JavaScript required) .
- ↑ a b c Entry on Trioctyl Phosphate in the Hazardous Substances Data Bank , accessed on November 18, 2014.
- ↑ Åke Bergman , Andreas Rydén, Robin J. Law, Jacob de Boer, Adrian Covaci, Mehran Alaee, Linda Birnbaum, Myrto Petreas, Martin Rose, Shinichi Sakai, Nele Van den Eede, Ike van der Veen: A novel abbreviation standard for organobromine , organochlorine and organophosphorus flame retardants and some characteristics of the chemicals . In: Environment International . tape 49 , 2012, p. 57–82 , doi : 10.1016 / j.envint.2012.08.003 , PMC 3483428 (free full text).
- ↑ Environmental report 61/2002 on house dust pollution in Hamburg by the authority for the environment and health
- ↑ Safety data sheet ( Memento from December 6, 2015 in the Internet Archive ) at OKS Spezialschmierstoffe GmbH.
- ↑ Tadiyose Girma Bekele, Hongxia Zhao, Qingzhi Wang Jingwen Chen: Bioaccumulation and Trophic transfer of Emerging organophosphates Flame Retardants in the Marine Food Webs of Laizhou Bay, North China . In: Environmental Science & Technology . November 6, 2019, doi : 10.1021 / acs.est.9b03687 .