SLS active matter versus total solids: choose the right purchase denominator

For sodium lauryl sulfate, total solids and surfactant active matter should not be treated as identical. Use the agreed active-matter result when the commercial comparison is explicitly cost per unit of active surfactant.

Read the separate composition entries

Stepan’s STEPANOL WA-100 bulletin, Typical Properties reports actives, unsulfated material and inorganic salts separately. These are its product data, not ENVO limits. The separation shows why a dry-residue result cannot automatically replace the named active-matter field.

Confirm the analytical method and calculation basis, especially if two suppliers use different conventions. A nominal grade label is not enough to establish a comparable denominator. Keep actual delivery terms and as-received composition in the quotation comparison.

Do not mistake the denominator for complete equivalence

The figures are invented. They exclude handling, losses and any formulation consequences of the other components. Even a cheaper active kilogram is not a qualified substitution if the finished formulation misses its requirements. Assess physical form and the complete specification separately.

Send ENVO the SLS grade, required active method, relevant composition limits and intended application. Ask for current documents and a representative sample. The calculation should make quotations comparable, not erase the formulation differences between them.

Related decisions

• SLS foam height is not a cleaning result: define both tests
• SLS unsulfated material: keep it separate from active matter and inorganic salts

Review Sodium Lauryl Sulfate (SLS) product identity and purchasing requirements. For the decision above, send ENVO your application, acceptance criteria, quantity and destination. Confirm the offered grade and available documents before ordering.