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Tallow (Beef) for Soap Making

Tallow (Beef) is a hard animal fat dominated by oleic (36%), palmitic (28%), stearic (22%). Its palmitic and stearic acids build a firm, long-lasting bar with a stable, creamy lather, making it a common backbone for cold process recipes.

Quick Facts

SAP (NaOH)
0.143
SAP (KOH)
0.200
Iodine
45
INS
147
Type
Hard oil
Role
Hardening base
Saturated
58%
Unsaturated
40%

How Much Lye for Tallow (Beef)?

With a SAP value of 0.143, fully saponifying tallow (beef) takes 0.143 grams of sodium hydroxide per gram of oil (at 0% superfat):

Oil amountNaOH (0% superfat)KOH (liquid soap)
100 g14.3 g20 g
500 g71.5 g100 g
1000 g143 g200 g

Real recipes use a superfat discount (typically 5%) and almost always blend several oils. Always run your full recipe through the Soaply lye calculator rather than weighing lye from a single-oil table.

Predicted Bar Properties

Derived from the fatty acid profile, for a bar made of 100% tallow (beef):

Hardness
58
Cleansing
8
Conditioning
40
Bubbly lather
8
Creamy lather
50

Fatty Acid Profile

Fatty acidPercentage
Lauric2%
Myristic6%
Palmitic28%
Stearic22%
Oleic36%
Linoleic3%
Linolenic1%

Substitutes for Tallow (Beef)

The closest matches by fatty acid profile, which is what actually determines how an oil behaves in soap. Swap by weight and re-run the lye calculation, since SAP values differ:

Build a recipe with Tallow (Beef)

The free Soaply calculator handles the lye math, water, superfat, and property predictions for any blend of 100 oils.

Open the lye calculator

More Animal Fats

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