ultraviolet absorbent UV-531 CAS NO.1843-05-6

chemical name: 2- hydroxy -4- octyloxy two benzophenone
chinese name: ultraviolet absorbent uv-531, benzophenone, bp-12 -12 two
english name: 2-hydroxy-4-n-octyloxybenzophenone (benzophenone-12)
molecular formula: c21h26o3
constitutional formula:

molecular weight: 326.43
cas number: 1843-05-6
einecs number: 217-421-2
physical and chemical properties: melting point 47-49 ℃, the density of 1.160g/cm3, soluble in benzene, hexane, acetone, slightly soluble in

ethanol, slightly soluble in two ethyl chloride.properties and uses: uv absorber uv-531 is a high performance, anti-aging agent, can absorb ultraviolet 240-340 nm, with light color, non-toxic, good compatibility features, small mobility, easy processing. it has maximum

protective effect on polymer, and help to reduce color, at the same time delay yellowing

and block physical performance loss.mainly used as a light stabilizer of polyethylene,

polypropylene, pvc, polyurethane rubber and other synthetic materials. widely used in pe,

pvc, pp, ps, pc, polycarbonate, acrylic, polypropylene fibre and vinyl acetate. but for

dry phenolic and alkyd varnish, polyurethane, acrylic, epoxy and other air drying products

and automotive repair paint, powder coating, rubber products, provide good light-stable effects for them. the amount of 0.1-0.5%.product specifications:
the appearance of pale yellow needle crystal powder
content is more than 99%
melting point 47-49 ℃
the loss on drying of < 0.5%
ash copy of < 0.1%
the transmittance of 450nm>90%
500nm>95%packaging and storage: paperboard barrel lined with plastic bag packing: net weight

25kg/ barrel; carton is lined with a plastic bag packaging: 20kg/ box; also can be designed

according to customer requirements.
in order to prevent caking, uv-531 should be transported and stored at 35 ℃.