Every degreaser is made of slightly different elements. Even though they share some common elements for degreasing, the quantity varies. While buying a degreaser, just make sure you didn’t buy one with toxic elements. Generally, the degreasers containing Perchloroethylene (Perc),  Trichloroethylene (TCE), and N-Propyl Bromide (nPB) are considered as the toxic one.