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Description of key information

Estimation of the acid base properties based on the chemical structure.
Analytical Development Physical Chemistry, Schering AG Berlin. Study report No. A12178 (ADP 2003_032), author H. Miklautz, dated 2003-01-21.
Result: Hydrocortisone-21-acetate can be considered as a neutral molecule in the pH range 2 to 10, which is of relevance for biological systems.

Key value for chemical safety assessment

Additional information

Except for the hydrox-groups, hydrocortisone-21-acetate does not contain any functional group which can be protonated or deprotonated significantly in aqueous solution.

The pKa calculation with the computer program ACD/pKa DB gave pKa’s of 12.4 and 14.6 for the aliphatic hydroxy-groups.

Therefore, hydrocortisone-21-acetate is to be considered as a neutral molecule in the pH range 2 to 10, which is of relevance for aqueous biological systems.