Is Lauramine Oxide a Surfactant?
Yes. Lauramine oxide is an amine oxide surfactant with the CAS number 1643-20-5, and it is also known as lauryl dimethyl amine oxide. The substance is water soluble and is commonly supplied as a 30 percent active solution that appears as a clear, light yellow liquid. Amine oxides such as lauramine oxide belong to the class of amphoteric surfactants, which means the charge character of the molecule changes with the pH of the formulation: it behaves as a non-ionic species in neutral and alkaline systems and takes on cationic character in acidic systems. That pH responsiveness is the reason it can be used across a wide range of cleansing and personal care products.
Chemical Identity and Typical Supply Form
| Parameter | Typical description |
|---|---|
| Chemical name | Lauramine oxide, also written lauryl dimethyl amine oxide |
| CAS number | 1643-20-5 |
| Surfactant class | Amphoteric amine oxide |
| Standard supply form | 30 percent active aqueous solution |
| Appearance | Clear to slightly hazy light yellow liquid |
| Solubility | Water soluble and compatible with most polar surfactant systems |
| Charge behaviour | Non-ionic character in neutral and alkaline media, cationic character in acidic media |
Key Functions in Formulations
Lauryl dimethyl amine oxide performs several functions at once, which is why formulators use it as a multifunctional building block rather than a single-purpose additive.
Foam boosting: increases foam volume and stabilises the lather created by primary anionic surfactants.
Viscosity building: thickens formulations and allows target viscosities to be reached with less auxiliary thickener.
Irritation reduction: lowers the harshness of anionic detergent systems, making finished products gentler on skin and hair.
Conditioning and antistatic action: improves wet and dry combability and reduces static charge on hair.
Emulsifying and dispersing support: acts as a co-emulsifier and helps disperse calcium soaps in hard water.
Oxidation stability: remains stable in formulations that contain oxidising agents such as peroxide.
Use in Hair and Skin Cleansing Products
Lauramine oxide is widely used in the cosmetics industry for its surfactant properties. It is a common ingredient in shampoos, body washes, facial cleansers, hand soaps, and other rinse-off cleansing formulations, where it helps create rich, stable lather and effectively removes dirt, oil, and impurities from skin and hair. In hair cleansing applications it leaves a conditioning effect that improves manageability, and in skin cleansing systems it moderates the tight, stripped feeling that strong anionic surfactants can leave behind. It is also used in household and industrial cleaning products where foam quality and detergency matter.
Performance Benefits
The compound offers a combination of useful properties: good thickening, antistatic, softening, foaming, and detergency performance; strong washing power with rich and stable foam; and a mild profile that is gentle on skin. It reduces the irritation potential of anionic systems, shows antimicrobial characteristics, disperses calcium soap in hard water, and is biodegradable, which supports its use in environmentally aware formulations. Because a single component delivers several of these effects, it often allows a formulator to simplify the surfactant package and reduce the total number of raw materials.
Formulating and Storage Notes
Typical use levels depend on the application and the target viscosity, and the 30 percent active solution is easy to dose into either cold or hot processes. It blends well with other surfactants, including betaines, amides, and sulfates, and it can be added at various stages of manufacture. Formulators should verify pH compatibility, check the effect on foam and viscosity in the final system, and run stability tests, especially in products containing oxidisers or high electrolyte levels. The liquid should be stored in closed containers away from strong acids and direct sunlight, and it should be protected from freezing to preserve a uniform, pourable product.
Frequently Asked Questions
Q: Is lauramine oxide a surfactant?
Yes. Lauramine oxide is an amine oxide surfactant, also known as lauryl dimethyl amine oxide, with CAS number 1643-20-5.
Q: What is lauramine oxide used for?
It is used in shampoos, body washes, and facial cleansers as a foaming and cleansing agent, a thickener, and a conditioning ingredient.
Q: What is the typical form of lauramine oxide?
It is commonly supplied as a 30 percent active solution, a clear, light yellow liquid that is soluble in water.
Q: What are the benefits of lauramine oxide?
It provides thickening, antistatic and softening action, rich and stable foam, low irritation, calcium soap dispersion, and biodegradability.
Q: Is lauramine oxide compatible with anionic detergents?
Yes. It works synergistically with anionic surfactants and reduces their irritation potential in the finished formulation.
Q: Can lauramine oxide be used with oxidisers?
Yes. Lauramine oxide is stable against oxidation and can be used in formulations that contain oxidising agents.