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Physical & Chemical properties

Dissociation constant

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Description of key information

GLP study (UV measurements) for estimation of the acid base properties, supported by calculation with a computer program.
Analytical Development Physical Chemistry, Schering AG Berlin. Study report No. A27063 (ADP 2005_062), dated 2005-04-13.
Result: Progesterone can be considered as a neutral molecule in the pH range 1 to 13.

Key value for chemical safety assessment

Additional information

The UV/VIS spectra of progesterone were measured at 25°C in 0.1 M HCl (approx. pH1), 0.1 M KOH (approx. pH13) and a buffer solution of pH7.

No significant spectral change was observed.

The pKa calculation with the computer program ACD/pKa DB gave no result.

Therefore, progesterone is to be considered as a neutral molecule in the pH range 1 – 13.