Are disinfectants safe? Quaternary ammonium found in blood

The chemicals in your spray are ending up in your serum

You use disinfectants to keep your home clean, but a 2026 study published in Environmental Science and Technology shows that the residue isn't just staying on your counters. Researchers identified a class of chemicals called silanol-ATMACs—a type of quaternary ammonium compound—that are actively bioaccumulating in the human body.

Using human serum albumin as a molecular bait, the study found these compounds in human blood at levels comparable to 18 other traditional, well-known QACs. While these chemicals are used in concentrations as high as 779 mg/L in medical-grade disinfectants, they are also making their way into your indoor environment through dust and surface contact.

Why these compounds stay in your system

The problem is how these chemicals behave once they enter your body. Compared to standard quaternary ammonium compounds, these silanol-ATMACs have longer elimination half-lives. This means your body struggles to break them down and get rid of them. They aren't just passing through; they are hanging around in your system.

We need to stop assuming that the products on store shelves are safe just because they are common. If you are looking to clean your space without adding these persistent chemicals to your home environment, it is time to switch to non-toxic home alternatives that don't rely on these bioaccumulative compounds.

Source: Cheng Y, Lv Z, Xia H, Guo X, Zhang X (2026). Environ Sci Technol.