Guaiacol, cas no:90-05-1,1-hydroxy 2- methoxybenzene,colorless or yellow crystal or liquid, widely used on pharmaceutical Guaiacol(99%TC),1 ... flavorings.package: 225kgs/plastic drum or as your demands. Guaiacol(99%TC), Vanillin material, Cas no:90-05-1,1-hydroxy 2- methoxybenzene