BASF (EXCHANGE: BAS.DE) ADRs are not available.
BASF is the world's largest chemical company. It is a German company. The full name is Badische Anilin Soda Farbrik, AG. The US website is: 
Operating divisions include chemicals (inorganics, petrochemicals, and intermediate products), plastics (engineering plastics, foams, and polyurethanes), performance products (acrylics, paper chemicals, personal care products, and pharmaceutical ingredients), functional solutions (catalysts, industrial coatings, and construction chemicals), and agricultural chemicals (herbicides, insecticides).
BASF is perhaps best known as a component (along with Hoechst and Bayer) of IG Farben, the German Dye Trust, which dominated the global chemicals business in the 1920s. They manufactured munitions for the Nazis, and were criticized for operating plants with slave laborers during World War II.
BASF is reported to be making a major investment in the development of advanced batteries especially lithium batteries--investing several hundred million in battery research between 2011 and 2016, and hopes to generate $500MM sales by 2020. Products include electrolytes and metal oxides and phosphates for cathodes. They supply for LFP and NMC and are working on lithium sulfur. Sion Power is developing a lithium sulfur battery. BASF has a stake in the company.
Archroma plans to acquire BASF's textile chemicals business in 2015.
Related Fool Discussion Boards
Post your questions on Motley Fool's "Chemicals" board. 
Recent Mentions on Fool.com
- 5 DAX Stocks With the Highest Dividends
- OPEC's Oil Pricing War May be Great News for Solazyme in 2015
- Voters Say "Heck No, Don't Label GMO!"
- FDA Says Antifreeze Ingredient Propylene Glycol Is Safe to Eat - Have You Had Your Fill Today?
- 3 Reasons DuPont's Stock Could Rise
- Long-Term Job Trends Are Better -- and Worse -- Than They Appear