used to manufacture acetamide, acetyl acetate, etc. methylheptenone and flavors and fragrances, paints, pharmaceuticals, advanced ink, fire and glue cotton, nitrification fiber, leather, dye. widely used in industries, also used as extracting agent and dehydrating agent, can be used for food, packaging and color printing, etc.. Desulfurization products used in leather tanning extract, tobacco materials, oil drilling, metal flotation, descaling and so on.