RoCide-DB20

Summary

Product identification

RoCide® DB20 is a concentrated, fast-acting, non-oxidizing liquid biocide for intermittent use, based on a 20% solution of dibromo nitrilopropionamide (DBNPA). It is certified by the U.S. Environmental Protection Agency (EPA) for use in reverse osmosis (RO) systems.

Performance benefits

• Instantaneous antimicrobial activity as a non-oxidizing slimicide and bactericide.
• Kills bacteria, fungi and algae.
• Certified by the U.S. Environmental Protection Agency for use specifically in RO systems.
• Degrades rapidly and naturally to comply with strict environmental discharge regulations.
• Compatible with polyamide and cellulose acetate membranes.
• Can be used with other Avista cleaners.

Operating limits

Biocide for Intermittent Use

• Acts as an on-line biocide for intermittent use, similar to a “shock treatment” to control fouling.
• Dose level and frequency should be optimized according to the bacteriological challenges present in the feedwater.
• A typical dose is 50 mg/l for one hour per week.

RO Membrane Cleaner

• Applied as the first stage of cleaning.
• Dosage: 50-200 mg/l depending on the degree of fouling.
• Circulation period: 1-3 hours.
• Added in batches of 50 mg/l four times during the circulation period.

Specifications

• Appearance: Clear, light yellow to amber liquid
• pH (as supplied): 2.0-5.0
• Specific gravity (H₂O = 1): 1.2-1.3

Packaging and Storage

• Store and apply RoCide DB20 as supplied.
• Not suitable for dilution with water.
• Standard regional pack sizes include Pail (50 lb / 20 kg), Drum (500 lb / 200 kg), and IBC tote (2500 lb / 1200 kg). Information on drumless or bulk tanker delivery is available on request.

Disclaimer: This extraction may miss figures, footnotes, or revisions. Contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror