For B2B buyers in the chemical industry, understanding product specifications is fundamental to making informed purchasing decisions. Cocamidopropyl Betaine (CAPB), a widely used amphoteric surfactant, is no exception. When you purchase CAPB, whether for personal care, household detergents, or industrial applications, scrutinizing its technical specifications ensures that it meets your formulation requirements and quality standards. This article breaks down key CAPB specifications and offers guidance for sourcing from China.

The primary specification for CAPB is its 'Active Matter' content, typically expressed as a percentage. This refers to the actual concentration of CAPB in the solution. Standard grades often range from 29-32% or 30-35%. Buyers should ensure the specified active matter aligns with their formulation needs, as this directly impacts the product's performance and the amount required per batch. A supplier like NINGBO INNO PHARMCHEM CO.,LTD. will clearly list this in their product data.

The 'pH Value' of CAPB is another critical parameter, usually measured on a 100% solution basis. For CAPB, a typical pH range is 5.0-7.0. Maintaining the correct pH is vital for product stability, efficacy, and compatibility with other ingredients in your formulation. Deviations from the expected pH can indicate impurities or issues with the manufacturing process, potentially affecting the final product's performance and shelf-life.

'Free Amine' content is a specification that relates to the residual unreacted amine precursors in the CAPB. High levels of free amine can lead to irritation and potential nitrosamine formation, which is a significant concern, especially for personal care products. Manufacturers aim to minimize this, with typical limits being MAX.0.5% or lower. Buyers should always look for suppliers who control and report this impurity closely.

'Sodium Chloride' content is another impurity to monitor. While present in some CAPB grades, excessive sodium chloride can affect viscosity and other physical properties. Specifications usually indicate a maximum percentage, often around MAX.6.0%. Understanding these limits helps in predicting how the CAPB will behave in complex formulations.

When you buy CAPB from Chinese manufacturers, pay attention to the 'Appearance' (e.g., Light yellow clean liquid) and 'Color (APHA)' value. A lower APHA value generally indicates a purer, higher-quality product with less coloration. Reliable suppliers will provide a range or maximum for this, ensuring visual consistency in your end products.

Finally, the CAS number 61789-40-0 identifies the specific chemical substance. Always confirm the CAS number matches your requirements. For purchasers sourcing from China, working with established suppliers who provide comprehensive specification sheets and Certificates of Analysis (CoA) for each batch is essential for quality assurance and traceability.