Indeno[4,5-d]-1,3-dioxin, 4,4a,5,6,7,8,9,9b-octahydro-7,7,8,9,9-pentamethyl-

Hydrolysis

Description of key information

In a GLP hydrolysis study performed according to OECD guideline 111, hydrolysis of the test substance was tested at varying temperatures and as a function of pH. In a preliminary test hydrolysis was measured at 50°C at pH 4, 7 and 9, showing a degree of hydrolysis of < 10% after 5 days at pH 7 and 9. Therefore at pH 7 and 9 the hydrolysis at 25oC was considered to be > 1yr. In the main test half-lives were determined at pH 4, at 60 and 70°C. From the main study, the rate of degradation of the test substance at 25°C was calculated, resulting in a DT50 of 34.1 days. 

Key value for chemical safety assessment

Half-life for hydrolysis:

1 yr

at the temperature of:

25 °C