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Physical & Chemical properties

Water solubility

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Description of key information

Valid experimental GLP-study using the flask method. 
General Physical Chemistry, Schering AG, Berlin, Study report A01509 (APC 60/00), author G. Winter, dated 2000-08-09.
Result: S(20°C) = 6.5 mg/L ± 0.4 mg/L

Key value for chemical safety assessment

Water solubility:
6.5 mg/L
at the temperature of:
20 °C

Additional information

The water solubility of hydrocortisone-21-acetate was determined using the flask method* according to EU Method A.6 at 20°C to be: 

S(20°C) = 6.5 mg/L ± 0.4 mg/L


Hydrocortisone-21-acetate can be considered as insoluble in water in accordance with the descriptive term of EP 3 and USP 23. The pH value of the saturated water solutions was determined to be 6.4 ± 0.4


(According to X-ray powder diffraction the starting material and the insoluble residues from water consist of the same solid state form.)


*this is a deviation from the guideline, because for solubilities below 10 mg/L the column elution method should to be used.