Procter & Gamble (P&G) has issued a voluntary recall of nearly three dozen of its aerosol hair products after recent reports that indicated traces of benzene, a cancer-causing chemical.

The company said on the website of the US Food and Drug Administration that it had begun a full review of its aerosol products under the Aussie, Herbal Essences, Pantene and Waterless brands. Previously discontinued aerosol dry shampoo products from its Hair Food and Old Spice brands were also included in the recall.

“The vast majority of our products are not part of this recall, including mousses, hairsprays, liquid shampoos, liquid conditioners, styling products, treatments, and unaffected aerosol dry shampoo sprays,” P&G said.

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Benzene is a colorless chemical that evaporates when it is exposed to air. It is classified as a human carcinogen, which, according to the American Cancer Society, can result in leukemia and blood cancer of the bone marrow, as well as life-threatening blood disorders.

P&G said, “Daily exposure to benzene in the recalled products at the levels detected in our testing would not be expected to cause adverse health consequences.”

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