What to recheck after adding monosodium fumarate to an acid blend

Set up the comparison

Give fumaric acid and monosodium fumarate separate material records. Record sodium contribution and total acid and measure pH and titratable acidity at equal volume and temperature.

Measurements to record

pH (Dimensionless). Test solution: 1.0 g per 30 mL. Also confirm water temperature and measurement method. Titratable acidity (As the specified acid). Record titration endpoint, sample concentration and conversion basis. Report pH separately. Record the sample ID and method revision for repeat testing.

Interpreting the results

Equal masses of the acid and the monosodium salt cannot be assumed to be equivalent. Check the finished system as well as the calculation.

What to record

• Salt form
• Sodium contribution
• Dose
• pH
• Titratable acidity

Technical references

• ENVO: Monosodium Fumarate product information ↗

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