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[Igel]

http://avogadro.chem.iastate.edu/MSDS/n-butyric_acid.htm
Corrosive. Causes eye and skin burns. May cause severe respiratory tract irritation with possible burns. May cause severe digestive tract irritation with possible burns. Combustible liquid and vapor. May be harmful if swallowed. Harmful if absorbed through the skin.


http://www.sciencelab.com/xMSDS-Butyric_acid-9923216
Very hazardous in case of skin contact (irritant), of ingestion. Hazardous in case of eye contact (irritant), of inhalation. Slightly hazardous in case of skin contact (corrosive, permeator). Liquid or spray mist may produce tissue damage particularly on mucous membranes of eyes, mouth and respiratory tract. Skin contact may produce burns. Inhalation of the spray mist may produce severe irritation of respiratory tract, characterized by
coughing, choking, or shortness of breath.... The substance is toxic to lungs, the nervous system, mucous membranes.


Yep. Watson's engaging in virtuous chemical warfare. And a bit of spin.


Vinegar doesn't hurt you either, and most people haven't been hospitalized because of skin irritation caused by Pepsi. Would you like to be hit by food-grade acetic acid? Perhaps have food-grade phosphoric acid flung at you?

Nah, thought not.