What Is Stearamidopropyl Morpholine?
Stearamidopropyl Morpholine is a synthetic, fatty amide derived from stearic acid, a long-chain fatty acid commonly sourced from plant oils like coconut or palm as well as animal fats. Chemically, it combines an 18-carbon stearic backbone with a morpholine ring connected through a propyl chain, producing a molecule that is both oil-compatible and water-friendly. The ingredient began gaining traction in the late 1990s when formulators looked for gentler ways to control static in hair care without relying on older quaternary ammonium compounds that could weigh hair down. Manufacturing starts with stearic acid that is first converted into stearamide, then reacted with 3-chloro-1-propylmorpholine under controlled conditions to attach the morpholine group. The result is a creamy, wax-like substance that disperses easily in surfactant blends. You will most often spot Stearamidopropyl Morpholine in shampoos, conditioners, leave-in sprays, anti-frizz serums and occasionally in styling creams where static control and detangling are needed.
Stearamidopropyl Morpholine’s Cosmetic Benefits/Uses
Formulators lean on this ingredient mainly for its ability to keep hair smooth and manageable.
Antistatic: By neutralizing the electrical charges that build up on hair strands during washing, drying or brushing, Stearamidopropyl Morpholine reduces flyaways and frizz. This leads to sleeker styling, less breakage from combing and an overall softer feel without a heavy or greasy residue.
Who Can Use Stearamidopropyl Morpholine
This ingredient is considered gentle and non-comedogenic so it suits most skin and scalp types, including oily, dry and sensitive. Because it stays mainly on the hair shaft rather than soaking into skin, it is unlikely to trigger issues for common skin concerns like eczema or psoriasis, though anyone with a known sensitivity to fatty acids may wish to be cautious.
Stearamidopropyl Morpholine itself can be sourced from either plant oils or animal fats. If you follow a vegan or vegetarian lifestyle look for brands that label the ingredient as plant derived or RSPO-certified palm to be sure it aligns with your values. Many mainstream hair-care lines now choose coconut or palm sources specifically to satisfy vegan claims.
No research suggests that the ingredient poses a risk during pregnancy or while breastfeeding when used in rinse-off or leave-on hair products. This is not medical advice and pregnant or nursing individuals should always clear any personal-care routine with a healthcare professional to stay on the safe side.
Stearamidopropyl Morpholine does not make skin or hair more sensitive to sunlight, and it does not interfere with common actives like retinoids or vitamin C. It is also safe for color-treated hair since it will not strip dye molecules.
Potential Side Effects/Adverse Reactions
Reactions vary from person to person and the following list covers potential side effects that could occur, but they are uncommon when the ingredient is used correctly by the manufacturer. Most people will experience none of these issues.
- Mild scalp or skin irritation such as itching or redness
- Contact dermatitis in individuals with an allergy to fatty amides
- Eye irritation if the product accidentally gets into the eyes
- Heavy or limp hair if overused, especially on very fine hair
If any negative reaction occurs stop using the product and consult a healthcare professional.
Comedogenic Rating
Stearamidopropyl Morpholine scores a 0–1 on the comedogenic scale. It is a large, fatty amide that largely stays on the hair shaft rather than penetrating skin, giving it little chance to clog pores. Its occlusive potential is low compared with heavier plant oils or butters, making it generally safe for acne-prone or breakout-prone users. Because the ingredient is usually present at low concentrations in rinse-off or light leave-in formulas, the risk of pore blockage is further minimized. One caveat is that formula companions such as heavy silicones or waxes can raise overall comedogenicity, so the entire product must be considered rather than this ingredient in isolation.
Summary
Stearamidopropyl Morpholine is an antistatic agent that smooths flyaways, reduces frizz and helps hair feel softer by neutralizing surface charges without leaving a greasy film. It is moderately popular in shampoos, conditioners and leave-in sprays, especially in formulations aimed at fine hair that cannot tolerate heavier quats. Safety data show a low irritation profile and virtually no comedogenic risk, making it suitable for most users including those with sensitive or acne-prone skin. As with any new cosmetic ingredient it is smart to patch test a product before full use to rule out personal sensitivities.