Multiple choice The fatty acid used as an additive in cigarettes is heptanoic acid caprylic acid nonanoic acid lauric acid tridecylic acid Reveal answer Fill a bubble to check yourself A Correct answer Explanation Heptanoic acid is used to esterify steroids in the preparation of drugs such as testosterone enanthate, trenbolone enanthate, drostanolone enanthate and methenolone enanthate (Primobolan). It is also one of many additives in cigarettes.