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DBNPA Liquid Biocide

DBNPA Biocide

DBNPA is a highly effective, environmentally friendly biocide. It provides a quick kill while also quickly degrading in water. The final end product is carbon dioxide and ammonium bromide. AMSA recommends and sells DBNPA for use with DTEA II® under appropriate conditions.

Product formulations

DBNPA Liquid (5% and 20% solutions)

For applications in water treatment, pulp and paper, reverse osmosis, oil and gas, and metalworking fluid applications

Solid, slow release tablet (40% DBNPA)- Discontinued by Manufacturer- no longer available.

DBNPA slow release tablets are no longer available from the manufacturer.  We regret we can no longer supply them.  Please contact us if you have any questions.

DBNPA Chemistry

Chemical name: 2,2-dibromo-3-nitrilopropionamide

Compatibility with other water treatment chemicals and water conditions: DBNPA is compatible with other treatment chemicals with the exception of mercaptobenzothiazole. It also is not compatible with ammonia or hydrogen sulfide-containing water. DBNPA maintains reliable control in systems running at acidic, neutral, or alkaline pH.

Degradation in water: DBNPA degrades quickly in aqueous environments. At neutral pH, its half-life is about nine hours (Exner, Burk, and Kyriacou: Rates and Products of Decomposition of 2,2-dibromo-3-nitrilopropionamide, J. Agr. Food Chem., Vol. 21, 1973, pp. 838–842). Continuous biocide release by the tablet maintains concentrations effective for control in the tower, while the biocide in the blowdown discharge degrades quickly. So it’s easy to meet strict environmental regulations on tower discharge.

Is DBNPA an oxidizer?

DBNPA is not an oxidizing biocide and it is not a bromine release biocide. DBNPA does act similar to the typical halogen biocides.


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