Fuming Sulfuric acid, also known as oleum is a strong dehydrating and sulfonating agent obtained by dissolving sulfur trioxide in conc. sulfuric acid. The chemical is extremely important in modern chemical industry and has found applications in various fields like dyeing, organic synthesis, paint and pigment manufacturing and in petrochemical industry. Maruti Fine Chemicals provide... https://www.indiamart.com/proddetail/fuming-sulphuric-acid-oleum-acid-19637850512.html