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EC number: 201-557-4
CAS number: 84-74-2
A oxygen-consumption test with acetone or nonylphenol as solubilizer
(Hüls 1988) showed no effects on microorganisms up to a concentration
level of 1.7 mg DIBP/L.
The study (Yoshizawa et al. 1977) showed a complete growth inhibition at
a DIBP level of 50 mg/L.
Toxicity of DBP to microorganisms
>10 (30 min NOEC)
>10 (6 h EC10)
2.2 (24 h EC50)
Yoshioka et al. (1985)
10.9 (30 min EC50)
Tarkpea et al. (1986)
In both Pseudomonas putida tests no effects of DBP were found even at
concentrations above the water solubility of the substance. The low
toxicity of DBP to bacteria is supported by the results of the
biodegradability test (Huls study, 1995; modified Sturm test). In this
test, showing ready biodegradability of DBP, a test concentration of
21.7 mg/l was used.
A test was developed using Tetrahymena pyriformis in order to determine
the toxicity of various chemicals. Pre-cultured T. pyriformis was
exposed for 24 h at 30°C to various concentrations of chemicals, and the
number of T. pyriformis surviving were then counted. The concentration
of the chemical, at which the proliferation of T. pyriformis was
restricted to one-half of the blank test (EC50), was determined.
In both Pseudomonas putida tests no effects of DBP were found even at concentrations above the water solubility of the substance. The low toxicity of DBP to bacteria is supported by the results of the biodegradability test.For the EC50 value the most sensitive endpoint (Tetrahymena pyriformis) has been chosen:
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