The brake liquid used in hydraulic system of brakes, is poisonous, therefore at its hit on skin it is necessary to wash away immediately it a large amount of water.
If liquid on imprudence got to eyes or in an organism, it is necessary to address immediately to the doctor.
Besides, brake liquid dissolves paint and plastic therefore at liquid hit on a paint and varnish covering of the car wash out it a large amount of water.
Brake liquid is hygroscopic, that is absorbs moisture from air therefore it is not recommended to use the liquid, being stored a long time in open ware.
Brake liquid should not contact with mineral oils. Even a small amount of mineral oil worsens properties of brake liquid and can put out of action and brake system.