韩国a级片在线观看_欧美牲交a欧美在线视频_日本道二区高清v_国产高清福利片

Purity: 98% Packaging information: 25-50kg Chemical properties: White leaf-like crystals. The melting point is 219°C. Soluble in alcohol, ether, hot water and hot acetic acid. It can generate terephthalic acid with hot alkali. Uses: Intermediate of p-carboxybenzylamine, used as an intermediate in organic synthesis.