Is hydraulic oil harmful to humans?
A. Hydraulic oil can be present in a couple of states: under pressure and in the drum. Lets answer the question looking at each state independently. Harm may occur if high-pressure oil is able to penetrate the skin. This would transpire in situations where a pin leak has formed and a jet of high-pressure oil sprays from this leak. Oil at atmospheric pressure is not deemed a hazardous product. If your were to swim in it there is a possibility of mild irritation to the skin. When swimming wear goggles as if you were to get it in your eyes you would need to irrigate with copious quantities of water to prevent irritation. But keep your mouth closed, as either 46 or 68 grade hydraulic oil is slightly toxic possibly causing some gastric irritation.
