Dynasty Chemicals (NingBo) Co., Ltd.
Some acid Dyes are used as food colorants.
In the laboratory, home, or art studio, the acid used in the dye-bath is often vinegar (acetic acid) or citric acid. The uptake rate of the dye is controlled with the use of sodium chloride. In textiles, acid dyes are effective on protein fibers, i.e. animal hair fibers like wool, alpaca and mohair. They are also effective on silk. They are effective in dyeing the synthetic fiber nylon, but of minimum interest in dyeing any other synthetic fibers.
In staining during microscopic examination for diagnosis or research, acid dyes are used to color basic tissue proteins. In contrast, Basic Dyes are used to stain cell nuclei and some other acidic components of tissues.