Salt, Base and Hydrate Conversion Factor
Conversion factor between two forms of one drug (salt and base, hydrate and anhydrous), from formulas or weights.
Open the tool → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Form A: formula
- C11H17N2NaO3
- Form B: formula
- C11H18N2O3
- Quantity to convert
- 100
- The quantity is a weight of form A (a) or of form B
- Form A (find the weight of form B it carries)
Result: 100 of form A carries 91.1455 of form B (the same unit).
The tool opens with these values already filled in. Replace them with your own.
What you enter
- Form A: formula (give this or its molecular weight)
- Form A: molecular weight
- Form A: active moieties per formula unit (blank is 1)
- Form B: formula (give this or its molecular weight)
- Form B: molecular weight
- Form B: active moieties per formula unit (blank is 1)
- Quantity to convert (optional)
- The quantity is a weight of form A (a) or of form B (b)
How this is calculated
Citation
Stoichiometry: factor = (molecular weight of form A ÷ its active moieties) ÷ (molecular weight of form B ÷ its active moieties), with molecular weights from formulas by the IUPAC CIAAW Abridged Standard Atomic Weights 2024. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.