Is Octadecanoic acid, 2-sulfo-, 1-methyl ester, sodium salt (1:1) vegan?

Sodium Methyl Stearate Sulfonate is also known as Octadecanoic acid, 2-sulfo-, 1-methyl ester, sodium salt (1:1).

Sodium Methyl Stearate Sulfonate is the sodium salt of the sulfonated methyl ester of stearic acid, used as a surfactant. Stearic acid used in its production can be sourced from either plant oils or animal fats.

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