At present, WEDM generally uses water-based working fluid, which is made of 100% water-based substance (usually soft water), without mineral oil, sodium nitrite, oil and greasy. After contact with the stock solution, hands can be washed directly with water. No pollution to the environment, no harm to human body, no oil pollution, no peculiar smell when using, clean and clear, reusable, and the waste liquid can be directly discharged after dilution. Among them, the non-aqueous component mainly contains triethanolamine, and the oral toxicity is the lowest among amines. Please feel free to use. I hope my answer can help you.