light stabilizer 531
post date: dec 08,2021 expiry date: jun 06,2022 detailed description: specs:yellowish crystalline powder property : ①yellowish crystals; ②yellowish fine powder freely soluble in benzene, n-hexane, acetone, slightly soluble in ethanol, very slightly soluble in ethane dichloride. specification content：≥99 % melting point: 47~49 °c ash: ≤0.1 %light transmittance: (450nm)≥90% (500nm)≥95%
