Flammability and Explosibility Perchloric acid is noncombustible. It is unstable and can decompose explosively at ordinary temperatures or in contact with many organic compounds. Mixtures of perchlorates with many oxidizable substances are explosive. Temperature increases the oxidizing power of perchloric acid, and hot concentrated solutions are very dangerous. Oxidizable organic compounds including alcohols, ketones, aldehydes, ethers, and dialkyl sulfoxides can react violently with concentrated perchloric acid.
All perchlorates are potentially hazardous when in contact with reducing agents.
In particular, splash goggles and rubber gloves should be worn when handling perchloric acid, and containers of the acid should be stored in a well-ventilated location separated from organic substances and other combustible materials. In the event of skin contact, immediately wash with soap and water and remove contaminated clothing. If perchloric acid is ingested, obtain medical attention immediately. If large amounts of this compound are inhaled, move the person to fresh air and seek medical attention at once. Organic absorbants must not be used.