Volume 5
Issue 4

Chempar Chemical Company, the manufacturer of chlorophacinone (the active ingredient in Rozol) has recently changed ownership, and is considering ceasing manufacture of this slow-acting, highly toxic anticoagulant.

In states where Rozol use against bats is legal (BATS, March 1987), pest control companies often blow pounds of the powder into residential attics where it sinks to the floor and remains active and potentially lethal for years, sifting into living quarters below and mingling, undetected, with household dust. Exposure of pregnant women to Rozol may cause birth deformities, and tests on animals indicate that it can cause serious injury or death, even before diagnostic signs are detected. In one case, a Minnesota child had been chronically ill since their home was “bat-proofed” with Rozol; it wasn’t until two and a half years later though that Rozol was identified as the cause. Tests showed the child had a very slow blood clotting time, and by then her lungs were extensively scarred.

Use of pesticides to eliminate bats causes far more problems than it purports to solve and, in the case of Rozol, is not even proven effective. First, an entire colony of bats is rarely present all at once and second, those remaining often roost in cracks where the powder can never reach them. In addition, once Rozol has settled to the floor, newly arriving bats won’t be affected since bats roost toward the ceiling. Those bats that are dusted will lick it off their fur, becoming sick and greatly increasing the odds of contact between sick bats and people or pets. Bats exposed to such pesticides also may have lower resistance to viral infection, thereby increasing the number that contract rabies.

There are better, safer ways of solving the problem of too many bats in an attic, such as closing the holes by which they enter (the only permanent solution). Use of Rozol only succeeds in assuring repeat business for pest control companies (millions of dollars annually just to eradicate bats) and in unnecessarily endangering the residents of the treated house for many years into the future.

Please urge Chempar to cease making this chemical. Write: Public Relations Officer; Chempar Chemical Company (Nitrigin, Inc.); 3101 West Custer Ave.; Milwaukee, WI 53209.