For bulk chemical buyers, understanding the precise specifications of UV absorbers is crucial for ensuring product quality and performance. UV Absorber BP-4 (CAS 4065-45-6) is a popular choice for its broad-spectrum UV protection, water solubility, and stability. This guide outlines the key specifications that purchasers should consider when sourcing this vital chemical from manufacturers.

The primary function of any UV absorber is its ability to absorb specific wavelengths of ultraviolet light. For BP-4, this typically ranges from 280 nm to 360 nm, covering both UV-A and UV-B segments. Critical metrics here are the Specific Extinction values at key wavelengths, such as E285 (≥460) and E325 (≥290). These figures indicate the material's absorptive power at those points, directly impacting its effectiveness in protecting formulations and materials from UV degradation. As a leading UV Absorber BP-4 manufacturer, we ensure our product meets these high standards.

Purity is another paramount specification. A high Assay, typically stated as ≥99.0% or ≥99.5%, signifies a product with minimal impurities. This is especially important for applications in cosmetics and pharmaceuticals where stringent quality is required. Other important parameters include Melting Point (≥140°C), Loss on Drying (≤3.0%), and Gardner color (≤2.0), which collectively speak to the material's consistency and processing ease. When you look to buy UV Absorber BP-4, always request a detailed Certificate of Analysis (CoA) to verify these specifications.

Stability is also a key consideration. BP-4 is noted for its good light and heat stability, making it suitable for various formulation types and storage conditions. Its water solubility is a significant advantage, simplifying incorporation into aqueous systems without the need for complex solvent systems. For buyers interested in securing a reliable UV Absorber 4065-45-6 supplier, understanding these performance characteristics is as important as the purity metrics. Competitive UV Absorber 4065-45-6 prices are important, but should not overshadow the need for reliable quality and consistent specifications.

By thoroughly evaluating these specifications, bulk chemical buyers can confidently select high-quality UV Absorber BP-4 from trusted manufacturers. This ensures that your end products receive the robust UV protection they require, maintaining their integrity and performance over time.