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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Diss Factsheets

Physical & Chemical properties

Water solubility

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Administrative data

Link to relevant study record(s)

Description of key information

Key value for chemical safety assessment

Additional information

The water solubility of REACTION MASS OF NITROSYLSULFURIC ACID AND SULPHURIC ACID can not be assessed according to the OECD guideline 105, as lifetime of the test item is extremely short in contact with water. Hydrolysis occurs following the chemical reaction below : HSO4NO + H2O H2SO4 + HNO2 HNO2 produced undergoes other complex reactions and by progressive addition of water, the ultimate transformation of HSO4NO nitrogen gives for 2/3 a mixture of NO and NO2 which are toxic gases and for 1/3 nitric acid.