Sresan, the Chennai-based manufacturer of Coldrif which caused children's deaths across multiple Indian states, appears to have started as a private limited company in 1990 before restarting as a proprietorship, NDTV Profit reported. The firm claims online to be "trader" of cough syrups, protein powders, pharma syrups and herbal child growth syrups. One 'Ranganathan' is listed as its GST partner.