Measurement of physicochemical properties of major Firemaster 550 components EH-TBB and BEH-TEBP and evaluation of their POP-like characteristics

Kuramochi, H.; Motoki, T.; Yui, K.; Endo, S.; Sakai, S.; Chen, Y.; Wania, F. (2019) 39th International Symposium on Haloganated Persistent Organic Pollutants, pp. 575

Introduction: Non-PBDE (polybrominated diphenyl ethers) brominated flame retardants (BFRs) including novel and emerging BFRs have been detected in the indoor and outdoor environments (e.g., indoor environment1). Some non-PBDE BFRs may have POP-like characteristics (persistence and long-range transport potential (LRTP)), as reported in our previous work2. In order to evaluate the POP-like characteristics of these chemicals, their physicochemical properties governing phase partitioning behavior must be obtained. In previous studies, we have measured the physico-chemical properties of non-PBDE flame retardants3,4 and evaluated persistence and LRTP using the OECD tool5. In addition, we evaluated the predictive performance of some property prediction models2,4. Following these studies, we measured the properties of 2-ethylhexyl-2,3,4,5-tetrabromobenzoate (EH-TBB) and bis(2-ethylhexyl)-3,4,5,6-tetrabromophthalate (BEH-TEBP), which are major components in Firemaster 550 (one of the alternative BFRs). As before, the POPs-like characteristics of these two chemicals were evaluated by the OECD tool, and several prediction models for vapor pressure were evaluated using the data for both BFRs.