β-Estradiol 17-acetate is a natural metabolite of estradiol. Hydrolytic enzymes in human cadaver, hairless dog, rat and hairless mouse skin can metabolize β-Estradiol 17-acetate to β-Estradiol. β-Estradiol 17-acetate transported across the human and hairless dog skin can be effectively metabolized before entering the capillary.

2-Ethoxyethyl acetate (2-EEA) is a colourless liquid with a fruity smell at room temperature and normal pressure. 2-Ethoxyethyl acetate belongs to the group of glycol ethers which are mainly used as solvents. 2-EEA was mainly used as a solvent in the chemical industry and for the formulation of paints, lacquers and varnishes for industrial use. 2-EEA was also used as an intermediate in the chemical industry.

Ni acetate is a water soluble salt of Ni, which leads to skin irritation, in particular to allergic contact dermatitis. May cause cancer according to animal studies. Symptoms of overexposure to nickel can cause sensitization, dermatitis, allergic asthma and pneumonitis.