Bronopol – Knowledge and References

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Antimicrobial Additives for Metalworking Lubricants

Published in Leslie R. Rudnick, Lubricant Additives, 2017

A reaction product of nitromethane and 2 mol of formaldehyde, plus a mole of bromine, is known as bronopol (BNPD, 2-bromo-2-nitro-1,3-propanediol, CAS# 52-51-7). An antibacterial product, bronopol, does not release free formaldehyde in its mechanism of antimicrobial action, and it is considered especially effective against resistant strains of Pseudomonas aeruginosa. This water-soluble product is not chemically stable, long term, at pH levels above about 8.0. Its usual dosage rate is about 50–400 ppm active material. Bronopol is well known as a preservative in personal care products, but it is not approved in Europe for use in MWF under the BPR.

A review on the removal of conditioning chemicals from cooling tower water in constructed wetlands

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Journal Information

Published in Critical Reviews in Environmental Science and Technology, 2018

Thomas V. Wagner, John R. Parsons, Huub H. M. Rijnaarts, Pim de Voogt, Alette A. M. Langenhoff

Several CC used in cooling towers are quickly removed by photodegradation. For instance, the commonly applied biocides 2,2-dibromo-3-nitrilopropionamide (DBNPA) and Bronopol show fast degradation as result of exposure to sunlight with 80% degradation of DBNPA within 72 h (Exner, Burk, & Kyriacou, 1973) and a 50% degradation in 70 h for Bronopol (Cui et al., 2011), respectively. Unfortunately, photodegradation of Bronopol results in the formation of 2-bromo-2-nitroethanol (BNE) and bromonitromethane (BNM), which are bioaccumulative and more persistent and toxic than the parent contaminant (Cui et al., 2011).