Description

Quaternium-18 Methosulfate is a quaternary ammonium compound used primarily in cosmetic formulations as a conditioning agent and emulsifier. It is known for its ability to improve the texture and performance of personal care products, such as hair conditioners and skin creams. This ingredient is derived from the reaction of a quaternary ammonium compound with methosulfuric acid, resulting in a salt that provides conditioning benefits.

Chemical Composition and Structure

Chemical Composition: Quaternium-18 Methosulfate is a quaternary ammonium compound where Quaternium-18 is combined with methosulfuric acid. This compound is a salt formed by neutralizing the quaternary ammonium compound with methosulfuric acid.

Structure: The structure consists of a quaternary nitrogen atom bonded to four alkyl groups, along with a methosulfate group (a sulfate ester), which enhances the solubility and conditioning properties of the compound.

Physical Properties

Appearance: Typically appears as a white or off-white powder or granules.
Solubility: Highly soluble in water, making it easy to incorporate into aqueous formulations.
pH: Compatible with a range of pH levels, which allows it to be used in various cosmetic formulations.

Production Process

The production of Quaternium-18 Methosulfate involves the following steps:

Synthesis of Quaternium-18: Quaternium-18 is produced by quaternizing a tertiary amine with an alkyl halide or similar reagent.
Reaction with Methosulfuric Acid: The quaternary ammonium compound is reacted with methosulfuric acid to form the methosulfate salt.
Purification and Processing: The resulting compound is purified and processed to achieve the desired purity and consistency.
Formulation: It is incorporated into cosmetic products during the manufacturing process.

Applications

Medical: Not typically used in medical applications.
Cosmetic: Widely used in hair conditioners, shampoos, and skin care products. It improves the texture and feel of products by providing conditioning benefits and enhancing product stability.
Food: Not used in food products.

Environmental and Safety Considerations

Generally regarded as safe for topical application. However, like all chemicals, it should be used in accordance with established guidelines to avoid potential allergic reactions or skin irritations. Individuals with sensitive skin or allergies should exercise caution. It is important to ensure that the compound is sustainably produced and free from harmful chemicals.

INCI Functions:


Antistatic agent. Static electricity build-up has a direct influence on products and causes electrostatic adsorption. The antistatic ingredient reduces static build-up and surface resistivity on the surface of the skin and hair.
Synonyms:

CAS: 61789-81-9 EC number 263-091-8