Is WD-40 Toxic?

March 9, 2020 by Lisa Powers

Question from Andy

Is WD-40 toxic?  My husband sprayed it all over a zipper on his jacket - I am concerned about putting it in the washing machine.  I understand some of the ingredients are petroleum distillates, and might be kerosene, or flammable ingredients.  Also, it leaves a terrible smell in washing machine that's almost impossible to get out.

I wash baby items in the machine and don't want any traces of toxins on her washcloths, etc.

Lisa’s Answer

Why don't you wash it in the sink so you don't need to worry about getting it on clothes in the washer?  The company does not disclose their formula but it is a petroleum-based product.  The Safety Data Sheet shows the following toxicity:

Inhalation: High concentrations may cause nasal and respiratory irritation and central nervous system effects such as headache, dizziness and nausea. Intentional abuse may be harmful or fatal.
Skin Contact: Prolonged and/or repeated contact may produce mild irritation and defatting with possible dermatitis.
Eye Contact: Contact may be irritating to eyes. May cause redness and tearing.
Ingestion: This product has low oral toxicity. Swallowing may cause gastrointestinal irritation, nausea, vomiting and diarrhea. This product is an aspiration hazard. If swallowed, can enter the lungs and may cause chemical pneumonitis, severe lung damage and death.

If you have a simple job like a squeaky hinge you can use extra virgin olive oil. It will eventually collect dirt and may get sticky so will have to remove it and reapply.