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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

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Physical & Chemical properties

Water solubility

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Description of key information

93.0 µg/L at 25°C


Key value for chemical safety assessment

Water solubility:
93 µg/L
at the temperature of:
25 °C

Additional information

It is known that organophosphites, which includes test item, are hydrolytically unstable, especially under acidic conditions (Goghova, 1989 and Stevenson, 1997).

When excess test item was mixed with water, the pH of the near-saturated solution was observed to decrease from 6.1 to 3.5 after 7 h of mixing at ca. 23°C, presumably due to an increase in phosphorous acid concentration caused by the hydrolysis of test item. This indicated that test item would be hydrolytically unstable in water, which precluded the performance of the water solubility test (OECD Guideline105).

Therefore the water solubility was estimated by the calculation using computer software manufactured by ACD.