The investments comprise a Rs 100 crore Hydrogen Peroxide Plant at Mettur, a Rs 350 crore CPVC project along with its Joint Venture company Kem One SAS, a France-based Chloro Vinyl company in Karaikal, Sanmar Group, Deputy Chairman, Vijay Sankar said.
Besides the two projects, the company would also be investing around Rs 600 crore for expansion at its existing facilities in Tamil Nadu, he said.
It is a 50:50 Joint Venture project and the factory would have an initial capacity of 20,000 tonnes.
Sanmar Group also has operations in Egypt manufacturing caustic soda and poly vinyl chloride under its firm TCI Sanmar Chemicals.
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TCI Sanmar Chemicals has invested about USD 1.20 billion in first phase and has manufacturing facilities in Port Said, Egypt.
"The investments will be investing Rs 1,800 crore for the expansion plans to increase the plant capacity there", he said.
To a query on becoming a privately-held company from being a listed entity, Sanmar Group Chairman N Sankar said the company would decide "to go public" in future, depending upon the market conditions.
"There is nothing to hide by becoming a private company (from being a listed firm). Stock market demands certain conditions. We are in commodity business and whether we need to go public may depend in future", he said.
A logo to mark the golden jubilee year was released on the occasion.