Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 8016-20-4, Whether you call it Grapefruit Oil, Citrus Grandis (Grapefruit) Peel Oil , Grapefruit Oil - Expressed or Oil of Shaddock you can be assured the Grapefruit Oil products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.