viewBox="0 0 20 20" fill="none" width="20" height="20" aria-hidden="true"> pH Buffer

AMINOMETHYL PROPANOL
Organic Amine (pH Regulator)

AMINOMETHYL PROPANOL is produced synthetically through the reaction of formaldehyde with isobutyraldehyde and subsequent reduction. Learn everything about its origin, effect, and the best application in your daily skincare routine here.

Also known as: AMP, 2-Amino-2-methyl-1-propanol, Isobutanolamine, AMP-95
Substance Class Organic Amine (pH Regulator)
INCI Name AMINOMETHYL PROPANOL
CAS Number 124-68-5
Quality EU Cosmetics Regulation compliant

viewBox="0 0 24 24" fill="none" width="32" height="32" aria-hidden="true"> What is AMINOMETHYL PROPANOL?

AMINOMETHYL PROPANOL, or AMP for short, is an organic amine that is indispensable as a pH regulator and neutralizing agent in modern skincare formulations. Developed as a skin-friendlier alternative to aggressive alkali hydroxides, AMP stabilizes the pH value in the slightly acidic to neutral range – exactly where most active ingredients work optimally. Particularly in Vitamin C serums, AHA peels, and carbomer gels, it ensures that active substances do not oxidize or lose their effect. Unlike triethanolamine (TEA), AMP does not form concerning nitrosamines and has little odor – a decisive advantage in leave-on products.

viewBox="0 0 24 24" fill="none" width="32" height="32" aria-hidden="true"> Where does AMINOMETHYL PROPANOL come from?

It is produced synthetically through the reaction of formaldehyde with isobutyraldehyde and subsequent reduction. Established in cosmetics since the 1970s as an alternative to aggressive alkali hydroxides. In modern cosmetics, extraction and processing are subject to strict quality standards according to EU Cosmetics Regulation (EC) No. 1223/2009. RAU Cosmetics exclusively sources cosmetic-grade raw materials from verified suppliers.

viewBox="0 0 24 24" fill="none" width="32" height="32" aria-hidden="true"> How does AMINOMETHYL PROPANOL work on a cellular level?

Functions as a weak organic base (pKa ~9.7) that neutralizes carboxylic acids in cosmetic formulations while forming water-soluble salts. This neutralization reaction makes it possible to incorporate acidic active ingredients such as AHA or ascorbic acid in a stable, skin-compatible form without destabilizing the pH of the overall formulation. At the same time, AMP buffers the pH value in the slightly alkaline range, thus preventing pH fluctuations during storage.

viewBox="0 0 24 24" fill="none" width="32" height="32" aria-hidden="true"> Dosage & Regulation

Typical use concentration: 0.1-2% in emulsions and gels, up to 5% in special pH-buffered systems

How it works on your skin

pH Stabilization

Keeps the pH value of the formulation constant at 6-8, which is crucial for the effectiveness of many active ingredients. Without pH buffers, for example, Vitamin C would oxidize or AHA would lose its exfoliating effect. AMP prevents this degradation through its buffering capacity.

Sparing the Skin Barrier

In contrast to mineral bases like NaOH, which aggressively shift the acid mantle, AMP works more gently. The organic structure is closer to the skin's own buffer systems and causes less osmotic stress on keratinocytes.

Active Ingredient Activation

Neutralizes carbomer gels (typical gel formers) and converts them into clear, stable gels. Simultaneously activates acrylate polymers without increasing viscosity too much – a balancing act that many other bases cannot achieve.

Texture Improvement

Creates creamier, smoother textures than triethanolamine (TEA) because it is less hygroscopic. Formulations with AMP feel lighter and absorb faster without leaving a sticky film.

Lower Sensitization Potential

In contrast to TEA or diethanolamine (DEA), it shows no nitrosamine formation upon contact with nitrite compounds. This makes AMP the preferred choice in formulations with preserving ingredients such as phenoxyethanol.

Who is it for?

Sensitive Skin

Enables gentle pH adjustment without aggressive lyes, thereby minimizing skin irritation.

All Skin Types

More skin-compatible than inorganic bases like sodium hydroxide or triethanolamine.

Mature Skin

Stabilizes anti-aging active ingredients such as retinol or Vitamin C through optimal pH value.

In your routine

Morning routine with Vitamin C

AMP stabilizes Vitamin C serums at pH 5.5-6, where ascorbic acid penetrates optimally without irritating. Apply the serum to cleansed skin – the buffering prevents the typical tingling.

Evening routine with AHA/BHA

In exfoliating products, AMP ensures that the pH value does not fall below 3.5 (which would lead to chemical burns). Use AHA products with AMP buffering 2-3 times weekly for gentle exfoliation.

Optimize use of gel textures

Carbomer gels with AMP absorb faster than creams. Apply a pea-sized amount and gently pat it in – the buffering keeps the active ingredient concentration constant.

Layering with other actives

You can easily combine AMP-buffered products with niacinamide, peptides, or hyaluronic acid, as the neutral pH range causes no incompatibilities.

Storage: Hygroscopic – attracts moisture from the air. Stable in pure form at room temperature, but should be stored airtight. Stable in aqueous formulations in the pH range 4-10. No light sensitivity.

Frequently Asked Questions

Why is AMP used instead of normal sodium hydroxide?

NaOH (caustic soda) is a strong base that raises the pH abruptly and is difficult to dose. AMP, on the other hand, buffers gently and controlledly. Furthermore, NaOH forms soaps with fatty acids, which can destabilize emulsions – AMP does not. The organic structure of AMP is also more skin-compatible and causes fewer irritations in sensitive skin.

Can AMP be used in natural cosmetics?

No, AMP is a synthetic ingredient and is not approved in most natural cosmetic standards (COSMOS, NATRUE, Ecocert). Natural cosmetics use amino acids like arginine or mineral bases like sodium bicarbonate instead, which, however, buffer less precisely.

Does AMP smell unpleasant like triethanolamine (TEA)?

AMP has a significantly weaker, less fishy-ammonia-like odor than TEA. In finished formulations, it is mostly odorless because it is used in lower concentrations. The transition from TEA to AMP in the 1990s was also odor-motivated – consumers found the TEA odor disturbing.

Is AMP comedogenic or can it worsen acne?

AMP itself is not comedogenic. It has a low molecular mass and is used in such small amounts that it does not clog pores. However, AMP-buffered carbomer gels can sometimes be too rich for very oily skin – in that case, better to choose lighter, watery formulations.

Can AMP trigger allergies?

True allergies to AMP are extremely rare. It is not on the list of 26 declaration-obligatory allergens of the EU. Occasionally, slight irritation is observed at very high concentrations (>5%), but this is more due to pH shift than the molecule itself. When used as intended (<2%), AMP is considered very well tolerated.

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