96人妻视频_96精品在线_日韩AV免费_日韩人妻AV_破处av

Custom made processing

With benzoic acid, phthalic anhydride and isophthalic acid as starting materials, the company synthesizes 3,5-Dinitrobenzoic acid, 3,5-Dinitrobenzoyl chloride, 3-Nitrophthalic acid, 3-Nitrophthalonitrile, 4-Nitrophthalic acid, 4-Nitrophthalonitrile , 5-Nitroisophthalic acid, 2-Methyl-6-nitroaniline and its derivatives, which are mainly used as medicine, pesticides, dyes, spices, new material intermediates.
71 Records 1234
Home

Home

News

News

About us

About us

Product

Product

Contact us

Contact us