B 2396 (OTTO) Butyl chloride, 98% Cas 109-69-3 - used as intermediates and solvents. B 2396 (OTTO) Butyl chloride, 98% Cas 109-69-3 - used for HPLC, spectrophotometry and environmental testing. B 2396 (OTTO) Butyl chloride, 98% Cas 109-69-3 - used as an alkylating reagent in organic and organometallic compound synthesis. It is also employed as an anthelmintic in veterinary medicine.