Immediately set aside and DO NOT USE any peroxide-forming chemicals that have formed crystals, precipitate, solids or an oily viscous layer, or any rusted, damaged, undated or suspicious containers of peroxide-forming chemicals. Call EHS at 919-962-5507 for assistance. Put up a sign near the container to warn other personnel not to touch it, until trained personnel can remove it from your lab.
Never attempt to force open a rusted or jammed cap, or a cap encrusted with scale, on a container of peroxide-forming chemicals. Never attempt to clean by scraping or rubbing glassware or other containers if an oily deposit or crusty residue is present.
Empty containers of ethers and other peroxide-formers must be triple-rinsed with water before discarding.