Ingredient dictionary

Stearamidopropyl Dimethylamine

A conditioning ingredient that helps hair feel softer, smoother and easier to detangle when rinsed or left on. It is on the label of 24 products in our library. Checked against our library November 6, 2026.

What Stearamidopropyl Dimethylamine does

Softens hair and reduces tangles
Helps conditioner feel smooth and slippery
Helps build a creamy, stable base with fatty alcohols

Stearamidopropyl dimethylamine is made by joining stearic acid, a fatty acid found in plant and animal fats, with a small amine molecule. It carries a nitrogen group that picks up a positive charge in acidic conditions. Formulators often add an acid to the mix, which makes the ingredient cationic, meaning positively charged.

Hair often carries a slight negative charge, so the positive charge helps the ingredient cling to strands after rinsing. This gives a soft, smooth feel and makes hair easier to comb. It is usually paired with fatty alcohols, which add richness and help the formula feel creamy.

Good for

Good for people who want softer, easier-to-comb hair, especially those with dry or frizzy hair.

Frequently asked questions

Is stearamidopropyl dimethylamine a silicone?

No. It is not a silicone. It is a fatty-acid-based conditioning agent. Silicones are a separate group of ingredients that also smooth hair, but this one is made from fats rather than silicon-based building blocks.

Does stearamidopropyl dimethylamine make hair greasy?

It appears most often in rinse-off products like conditioners and masks, and in leave-in formulas too. Like any conditioner, using too much can weigh fine hair down, so a modest amount often works best.