Accidental Production of Hydrogen in an Manufactory of Electronics Products (726)

The event occurred at the factory producing multilayer circuit boards by a multistep dip operation. An employee inadvertently mixed 55 gal of 50 percent hydrogen peroxide into 110 gal of 30 percent formaldehyde. This resulted in a carbon monoxide and hydrogen release. The facility was evacuated and the local fire department and ambulance responded. 14 workers, out of whom three were from temporary employment agencies, were treated for inhalation and released.The employee did not look carefully at the label on the hydrogen peroxide drum.