Sodium hydrosulfite is toxic and can irritate the eyes and respiratory tract mucosa. It is widely used in the textile industry for reduction dyeing, reduction cleaning, printing, decolorizing, and bleaching silk, wool, nylon, and other fabrics. As it contains no heavy metals, fabrics bleached with it retain bright colors that are less prone to fading. It is also used to neutralize white fabrics that have been yellowed by sodium hypochlorite or potassium permanganate bleaching.
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