Product Details: n-Heptane. Synonyms & Trade Names: Heptane, normal-Heptane CAS No. 142-82-5 RTECS No. MI7700000. DOT ID & Guide. 1206 128. Formula.: CH₃[CH₂]₅CH₃ Application: n-Heptane is a straight-chain alkane consisting of seven carbons that is widely used as a completely non-polar solvent.n-Heptane is sometimes chosen as a less toxic option to the traditional hexane in … Continue reading n-Heptane, CAS No. 142-82-5