The iron, that relic of households past, is no longer required to look neat and freshly pressed. Why bother when retailers like Nordstrom offer crisp “wrinkle-free finish” dress shirts and L. L. Bean sells chinos that are “great right out of the dryer.”

Though it is not obvious from the label, the antiwrinkle finish comes from a resin that releases formaldehyde, the chemical that is usually associated with embalming fluids or dissected frogs in biology class.

And clothing is not the only thing treated with the chemical. Formaldehyde is commonly found in a broad range of consumer products and can show up in practically every room of the house. The sheets and pillow cases on the bed. The drapes hanging in the living room. The upholstery on the couch. In the bathroom, it can be found in personal care products like shampoos, lotions and eye shadow. It may even be in the baseball cap hanging by the back door.

Most consumers will probably never have a problem with exposure to formaldehyde, though it can have serious health implications for people who work with the chemical in factories. The biggest potential issue for those wearing wrinkle-resistant clothing can be a skin condition called contact dermatitis. It affects a small group of people and can cause itchy skin, rashes and blisters, according to a recent government study on formaldehyde in textiles. Still, some critics said more studies on a wider array of textiles and clothing chemicals were needed, including a closer look at the effects of cumulative exposure. At the very least, they said, better labeling would help.