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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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


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Administrative data

Link to relevant study record(s)

Description of key information

Basic Yellow 28 Acetate is only stable in presence of significant concentrations of free acetic acid; it can not be isolated as such.
The test substance is an aqueous solution in 40 % acetic acid. Therefore the acetic acid solution is relevant for the density and not the Basic Yellow 28 Acetate.
The density of acetic acid is 1.0446 at 25 ˚C
The density of Basic Yellow 28 Acetate is between 1.077 - 1.143

Key value for chemical safety assessment

Relative density at 20C:

Additional information

The relative density of the methyl sulfate salt at ambient temperature (compared to water at 4 °C) is 1.34.