China UV531 Suppliers - High-Quality Light Yellow Crystalline Powder from Trusted Factory
Product Description
| Chemical Name | 2-Hydroxy-4-n-octoxybenzophenone | ||
| CAS Number | 1843-05-6 | ||
| Molecular Structure |
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| Product Form | Light yellow crystalline powder | ||
| Specifications | TEST | SPECIFICATION | |
| Purity (%) | 99.00 min | ||
| Melting Point (℃) | 47.00 – 49.00 | ||
| Volatiles (%) | 0.50 max | ||
| Ash (%) | 0.10 max | ||
| Transmittance (%) | |||
| 450 nm | 90.00 min | ||
| 500 nm | 95.00 min | ||
| Application |
YIHOO UV-531 is a high-performance benzophenone-class ultraviolet (UV) absorber, chemically designated as 2-hydroxy-4-n-octanoxy-benzophenone. At room temperature, it presents as a pale yellow needle-like crystalline powder. As a highly efficient anti-aging additive, it exhibits strong absorption of ultraviolet light in the 270–340 nm range—the key UV band that triggers polymer degradation and aging.
This product features a comprehensive set of superior properties including low coloration, non-toxicity, excellent substrate compatibility, low migration tendency, and excellent processability. It is widely applicable to a broad spectrum of polymer materials such as PE, PVC, PP, PS, PC, acrylic glass, polypropylene fibers, and ethylene-vinyl acetate (EVA) copolymers. In addition, it delivers excellent light stabilization effects for dry phenolic varnishes, alkyd varnishes, polyurethane, acrylic, epoxy and other air-drying coating systems, as well as automotive topcoats, powder coatings, polyurethane products, and rubber articles. The recommended dosage ranges from 0.1% to 0.5% by weight relative to the target material. |
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| Package | 20 / 25 kg carton | ||
Frequently Asked Questions
Q
What is YIHOO UV-531 and what is its chemical identity?
A
YIHOO UV-531 is a high-performance benzophenone-class UV absorber with the chemical name 2-Hydroxy-4-n-octoxybenzophenone, CAS number 1843-05-6. At room temperature it appears as a pale yellow needle-like crystalline powder and strongly absorbs ultraviolet light in the 270–340 nm range.
Q
Which polymer materials is UV-531 compatible with?
A
UV-531 is compatible with a wide range of polymer substrates including PE, PVC, PP, PS, PC, acrylic glass (PMMA), polypropylene fibers, and ethylene-vinyl acetate (EVA) copolymers, making it a versatile choice for plastics processing applications.
Q
Can UV-531 be used in coating and varnish systems?
A
Yes. UV-531 provides excellent light stabilization for a variety of coating systems, including dry phenolic varnishes, alkyd varnishes, polyurethane coatings, acrylic coatings, epoxy coatings, automotive topcoats, and powder coatings, as well as rubber articles and polyurethane products.
Q
What is the recommended dosage for UV-531?
A
The recommended dosage of UV-531 is 0.1% to 0.5% by weight relative to the target material. The optimal loading level may vary depending on the specific substrate, processing conditions, and desired level of UV protection.
Q
What are the key quality specifications for UV-531?
A
UV-531 meets the following quality standards: purity ≥ 99.00%, melting point 47–49 °C, volatiles ≤ 0.50%, ash ≤ 0.10%, transmittance at 450 nm ≥ 90.00%, and transmittance at 500 nm ≥ 95.00%, ensuring consistent and reliable performance in end applications.
Q
How is UV-531 packaged and stored?
A
UV-531 is supplied in 20 kg or 25 kg cartons. It should be stored in a cool, dry, and well-ventilated area away from direct sunlight and heat sources to maintain product quality and stability over its shelf life.