Recording the hydrate form of azithromycin in an analytical test request

Set up the comparison

State the azithromycin hydrate, whether potency or content is being reported, and the current specification version. Match sample, reference standard and method before comparing lots.

Measurements to record

Hydration state (Substance identity). Verify the offered form, test reference and moisture content. Potency (µg/mg). State the edition, measured moisture and conversion basis. Record the sample ID and method revision for repeat testing.

Interpreting the results

Check as-received versus anhydrous basis against measured moisture. Use the same potency unit and conversion before assessing a deviation.

What to record

• Hydrate
• Reporting unit
• Standard revision
• Reference standard
• Sample lot

Technical references

• USP: azithromycin forms and potency definitions ↗

Products and processes