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Environmental fate & pathways

Hydrolysis

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Reference
Endpoint:
hydrolysis
Type of information:
other: Well documented report, based on scientific literature.
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Well documented report, based on scientific literature. No guideline is reported.
Qualifier:
no guideline available
Principles of method if other than guideline:
No guideline is reported
Transformation products:
not measured
Details on hydrolysis and appearance of transformation product(s):
no data
Remarks on result:
other: no data
Remarks on result:
other: no data
Details on results:
A test on the hydrolysis potential of DBP indicated that at pH 4.0 and 7.0 DBP was found to be stable, i.e. less than 10% hydrolysis after 5 days. At pH 9.0 and a temperature of 50°C a half-life time of 65.8 hours was reported. These results are in line with the RIVM-conclusion (RIVM,1991) that the contribution of hydrolysis to the overall environmental degradation of phthalate esters, including DBP, is expected to be low.
Conclusions:
A test on the hydrolysis potential of DBP indicated that at various pH values DBP was found to be stable resp. that the contribution of hydrolysis to the overall environmental degradation of phthalate esters, including DBP, is expected to be low.

Description of key information

A test on the hydrolysis potential of DBP indicated that at various pH values DBP was found to be stable resp. that the contribution of hydrolysis to the overall environmental degradation of phthalate esters, including DBP, is expected to be low. Only at a higher pH value and temperature the hydrolysis of DBP turns turns to a higher level.

Key value for chemical safety assessment

Half-life for hydrolysis:
65.8 h
at the temperature of:
50 °C

Additional information