Comparing HEDP quotations on an acid or as-supplied solution basis

Trial design and interpretation

Check the label for acid or salt form, followed by the active basis and commercial solution concentration. Divide delivered price by active mass fraction only when the purchasing target and reporting basis match.

Recording Active acid

Active acid: use the agreed method. Specify the result as HEDP acid. Agree a separate basis for salts or blends. Density: use the agreed method. Use the value for the actual lot when converting the delivered volume to mass.

How do we convert a drum price to delivered cost per kilogram of active acid?

Verify net weight after tare deduction and the batch active acid fraction, then include freight. Drum volume is not mass. Cooling-water scale control: At equal hardness, temperature and concentration cycles, compare water clarity and deposits.

What to record

• Acid or salt form
• Active matter method
• Stock concentration
• Unit active price

Technical references

• ENVO public product information · Verify against the ordered grade and lot ↗

Products and processes