industrial tannic acid,pharmaceutical tannic acid,dye grade,food geade,beer-mashing grade,beer brewing grade

Physicochemical Properties:It is faint yellow or brown non-stereotypia powder, deep when exposure to the air, odourlessness, astringency. Dissolves in the water, ethyl alcohol, acetone and ethyl acetate. Quality standard:GB5308?5 Technical index:Appearance:Faint yellow or brown non-stereotypia powder            Content¡Ý81.0%            Water¡Ü9.0%            Water insoluble substance¡Ü0.6%            Total color¡Ü2.0 Use:It is raw material of preparing medical gallic acid, burnt gallic acid, sulfonamides. Preparing Gallic acid and burnt Gallic acid in chemical production, mud finishing agent in oil industry, in addition, used in producing leather tanning agent, mordant, rubber peptizer, protein medicinal preparation, alkaloid precipitating agent, dressing inhibitor, wines clarifying agent, germanium extraction and blue-black ink and so on.

tannic acid