Carbomer 99%, also known as Poly(Acrylic Acid) (CAS No. 9007-20-9), is a widely utilized synthetic polymer celebrated for its exceptional functional properties. Understanding its characteristics, proper handling procedures, and safety guidelines is crucial for maximizing its benefits in various applications, from personal care to pharmaceuticals.

Key Properties of Carbomer 99%

As a high-purity grade, Carbomer 99% presents as a fine, white, fluffy powder. Its defining characteristic is its remarkable ability to swell in water and form clear, viscous gels at very low concentrations, typically between 0.1% to 0.5%. This thickening efficiency is significantly higher than many traditional agents. Carbomer exhibits good transparency, low ion resistance, and low shear resistance, making it suitable for a wide range of formulations. It's important to note that Carbomer itself is acidic; neutralization with a suitable base, such as sodium hydroxide or triethanolamine, is required to achieve optimal gelling and viscosity.

Handling and Preparation Best Practices

Proper handling of Carbomer 99% powder is essential to prevent dusting and ensure effective dispersion. High-shear mixing is often recommended to break down any agglomerates and achieve full hydration. The swelling process can take some time, and complete hydration is indicated when the neutralized Carbomer forms a uniform, clear gel without visible particles. It’s important to avoid prolonged or excessive shearing after neutralization, as this can degrade the polymer network and reduce viscosity.

Safety and Regulatory Considerations

Carbomer is generally regarded as safe and well-tolerated for topical applications. It has a long history of use in cosmetics and pharmaceuticals with a low incidence of skin irritation or sensitization. However, as with any fine powder, inhalation should be avoided, and appropriate personal protective equipment (PPE) like dust masks and gloves are recommended during handling. Eye contact should also be avoided. Manufacturers typically provide detailed Safety Data Sheets (SDS) outlining specific handling, storage, and emergency procedures, which should always be consulted.

Sourcing and Application

For formulators seeking reliable carbomer 99% applications, sourcing from reputable suppliers is key. High purity poly(acrylic acid) ensures consistent performance and adherence to quality standards, critical for both cosmetic and pharmaceutical products. Whether you are looking for a thickening agent for your latest skincare innovation or a stabilizing excipient for a new drug formulation, understanding these properties will help you leverage Carbomer 99% effectively.