When specifying chemical additives for Polyvinyl Chloride (PVC) formulations, understanding the precise characteristics and intended applications of different grades is crucial for optimal performance. Stearoylbenzoylmethane (SBM) is a key β-diketone additive, widely recognized for its benefits in PVC stabilization, particularly in enhancing transparency and preventing thermal degradation issues like 'zinc burning'. However, SBM is typically available in different grades, most commonly SBM-50 and SBM-55, each with distinct specifications. For procurement managers and formulation scientists, choosing the correct grade can significantly impact the final product's quality and processing efficiency. As a reputable manufacturer of Stearoylbenzoylmethane in China, we aim to clarify these differences to help you make informed purchasing decisions. If you are looking to buy SBM 50 or SBM 55, understanding their nuances is key.

The primary distinction between SBM-50 and SBM-55 lies in their purity and, consequently, their typical applications and performance profiles. SBM-50 generally refers to a grade with a purity of 97% minimum, while SBM-55 typically indicates a grade with a minimum purity of 70%. Both grades share the same core chemical structure (C26H42O2) and CAS number (58446-52-9), and both are utilized as secondary heat stabilizers in PVC formulations. The choice between them often depends on the specific requirements of the application, cost considerations, and the desired balance of properties.

SBM-50, with its higher purity (≥97%), is often preferred for applications where maximum clarity, superior heat stability, and excellent long-term performance are critical. This grade is particularly suitable for demanding transparent PVC applications such as high-quality bottles for mineral water or edible oils, clear films, and medical devices. Its higher concentration of active compound ensures more efficient stabilization and better prevention of defects like 'zinc burning' and initial discoloration. For manufacturers prioritizing ultimate product quality and longevity, investing in the higher purity SBM-50, especially when sourced from a reliable manufacturer like us, is a sound strategy. We provide consistent quality for this grade.

SBM-55, while having a lower minimum purity (≥70%), remains a valuable and cost-effective option for a wide range of PVC applications. It still provides significant benefits in terms of heat stabilization, improved initial coloring, and prevention of degradation, making it suitable for many general-purpose transparent PVC products, including certain types of sheets, films, and profiles. The reduced purity might be acceptable in applications where the cost-effectiveness is a primary driver, and the performance requirements are slightly less stringent than those for premium transparent products. If your goal is to buy CAS 58446-52-9 at a more accessible price point for general PVC stabilization, SBM-55 might be the ideal solution. Our manufacturing processes ensure that even this grade meets reliable quality standards.

The choice between SBM-50 and SBM-55 also depends on the overall PVC formulation and the type of primary stabilizer used. For instance, when paired with high-performance Ca/Zn stabilizer systems in applications demanding the utmost clarity and durability, the higher purity of SBM-50 is often recommended. However, for broader applications where a balance of performance and cost is sought, SBM-55 can offer an excellent solution. As a leading manufacturer in China, NINGBO INNO PHARMCHEM CO.,LTD. offers both SBM-50 and SBM-55, ensuring that you can source the most appropriate grade for your specific needs. We encourage you to contact us to discuss your application requirements and to obtain a quotation for bulk Stearoylbenzoylmethane.