Registration Dossier

Environmental fate & pathways

Hydrolysis

Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

Hydrolysis occurs within hours at pH 7 and room temperature. Main hydrolysis products are thiosulfate (S2O32-) and sulfite (SO32-). Small amounts of sulfur and sulfide (S2-) have been detected during oxygen-free hydrolysis.

Key value for chemical safety assessment

Additional information

At pH 9-11 there is a 1% decomposition within 1 hour and at pH 7 there is a 2% decomposition within the same time frame. This period represents a slow induction period which is later followed by rapid accelleration due to autocatalytic processes. Below pH 6 there is a much shorter induction time and below 4.8 there is no induction time at all (Münchow 1992).