Rasathanthram (transl. Chemistry) is a 2006 Indian Malayalam-language family drama film written and directed by Sathyan Anthikkad and starring Mohanlal and Meera Jasmine, with Bharath Gopi, Innocent, Oduvil Unnikrishnan, and Mamukkoya in prominent roles. The film was produced by Antony Perumbavoor through Aashirvad Cinemas. The soundtrack album was composed by Ilaiyaraaja, while Alagappan N. handled the cinematography.

Mohanlal Viswanathan is an Indian actor, film producer, playback singer, film distributor, and director who predominantly works in Malayalam film industry besides also having sporadically appeared in Tamil, Hindi, Telugu and Kannada films. Mohanlal has a prolific career spanning over four decades, during which he has acted in more than 400 films. Mohanlal's contributions to the Malayalam cinema have been praised by his contemporaries in the Indian film industry. The Government of India honoured him with Padma Shri in 2001, and Padma Bhushan in 2019, India's fourth and third highest civilian honours, for his contributions to Indian cinema. In 2009, he became the first actor in India to be awarded the honorary rank of lieutenant colonel in the Territorial Army. Mohanlal was named as one of "the men who changed the face of the Indian Cinema" by CNN-News18.