D. Brown et al., THE EFFECT OF PHTHALATE ESTER PLASTICIZERS TESTED AS SURFACTANT STABILIZED DISPERSIONS ON THE REPRODUCTION OF THE DAPHNIA-MAGNA, Chemosphere, 36(6), 1998, pp. 1367-1379
The phthalate ester plasticisers, di-2-ethylhexyl phthalate (DEHP), di
-iso-nonyl phthalate (DINP), DINP produced by the ''polygas'' process
(DINP-PG), di-n-nonyl/n-undecyl phthalate (L911P), di-n-octyl/n-decyl
phthalate (L810P), di-iso-decyl phthalate (DIDP), di-iso-heptyl phthal
ate (DIHP), di-n-hexyl/n-decyl phthalate (L610P), di-undecyl phthalate
(DUP), di-heptyl/nonyl phthalate (L79P), di-iso-undecyl phthalate (DI
UP) and di-iso-tridecyl phthalate (DTDP) have been tested for acute an
d chronic toxicity to Daphnia magna. In addition, di-2-propylheptyl ph
thalate (DPHP) has been tested for chronic toxicity to Daphnia magna.
The test organisms were exposed at a nominal concentration of 1 mg pht
halate per litre presented as a dispersion with either ''Tween 20'' or
''Marlowet R40''. For the chronic studies, the nominal concentrations
were verified by analysis, except for the L911P where, due to chromat
ographic difficulties, the test concentration could not be determined
and this was estimated as 56% of nominal by analysis of the stock. The
exposure period for the acute studies was 48 hours and the test organ
isms were monitored for notation in the surface layer and mortalities.
The chronic studies were conducted over 21 days. The end points were
the numbers of young produced, survival of the parent animals and the
length of the parent animals at the end of the 21 day exposure period.
No significant negative effects, relative to the controls, were seen
in either the acute or the chronic studies. (C) 1998 Elsevier Science
Ltd.