The hazard: Glutaraldehyde is a toxic chemical that is used for cold sterilization of medical and dental equipment. It is in Cidex and other products.Glutaraldehyde can cause severe irritation of the eyes, nose, throat, lungs, nausea, headaches, drowsiness, and dizziness. Avoid using the product (substitution): Where possible, the use of glutaraldehyde should be avoided by using less toxic chemicals or other processes for sterilization. 2  Use equipment to avoid exposure (engineering controls): Glutaraldehyde should be used in a contained process along with local exhaust ventilation.