Sendhil Naathan Kalyanasundaram (K. Sendhil Naathan) (born 06 September 1961) is an Indian Business Executive, the Managing Director of TANFAC Industries Limited, a Joint Venture company of Tamil Nadu Industrial Development Corporation and Anupam Rasayan India Limited.

TANFAC has signed a framework agreement with one of the leading Japanese specialty chemical companies to supply a refrigerant gas.^{[1] [2]}