Chemical industries

http://in.kompass.com/a/chemical-base-materials/21/r/tamil-nadu/in_intn/
http://www.exportersindia.com/india/tamil-nadu/chemicals.htm
http://www.chemitherm.com/List_Of_Clients.htm
http://www.india.itrademarket.com/comp/tamil_nadu/India/Chemicals/all/0.html
http://chemical.industry-focus.net/tamil-nadu-chemical-projects.html
https://companylist.org/India/Keywords/Chemical_Companies_in_Tamilnadu/

india
http://nitinchem.tripod.com/ListIndChemIndus.htm
http://chemicals.nic.in/Directory%20of%20Chemicals%20Units%20(2012-13).pdf

Jobs
http://www.indeed.co.in/jobs?q=Chemical+Industries&l=Tamil+Nadu