iq-dropA chemical that’s in a lot of household products may be hurting children’s IQ’s.

Women who had a high amount of the chemicals called di-n-butyl phthalate and di-isobutyl phthalate in their bodies during pregnancy gave birth to children who had markedly lower IQ scores, according to a new study running in the journal PLOS One.

The study found that by the age of 7, children exposed to more of these chemicals had IQ’s that were more than six points lower than children exposed to lower levels of the chemicals.

Phthalates make plastics more flexible and harder to break. These plasticizers are also good at helping chemicals carry a particular scent.

The material is found in a wide variety of things people use every day, like the containers you use to store food or heat it up in the microwave. Phthalates are also in air freshners, dryer sheets, shampoos, cosmetics and many other things you’d find around your house.