← All oils

Oleic Acid

Saponification values, fatty acid makeup, and what this oil does in a bar of soap.

Saponification values

Grams of lye needed to saponify one gram of oleic acid. Multiply by your oil weight, then apply your superfat.

NaOH (bar soap)
0.144
KOH (liquid soap)
0.202
Iodine
92
INS
110

INCI: Oleic Acid

Fatty acid profile

Fatty acidPercentage
Oleic99%

Soap qualities at 100%

What a bar made entirely of oleic acid would score. Almost nobody soaps a single oil at 100% — this is here so you can see what the oil contributes to a blend. The shaded band is the range most makers aim for in a finished recipe.

  • Hardness0
  • Cleansing0
  • Conditioning99
  • Bubbly lather0
  • Creamy lather0

What that means in a recipe

Almost no cleansing contribution (0) against high conditioning (99). Gentle on skin, but a bar built mainly on this will be slow to trace, slow to harden, and low on bubbles without something to balance it.

Very little hardness (0). Expect a soft bar and a longer cure unless it is combined with a harder fat or butter.

Derived from the numbers above rather than written by hand, so it stays in step with the data. Tendencies, not guarantees — your oils, water, and technique all move the result.

Oils that behave similarly

Closest matches by fatty acid makeup — the usual starting point when you have run out of oleic acid and need a substitute. Check the lye maths again after swapping: SAP values differ even between oils that behave alike.

Build a recipe with Oleic Acid →