Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

Hoffmann QB-20 Biocide

Hoffmann QB-20 Biocide is a broad-spectrum, non-oxidizing biocide from Hoffmann’s QB Series, formulated for industrial water systems. It effectively controls bacteria, fungi, and algae without corroding equipment. Compatible with common water treatment chemistries, it offers stable performance across varying pH and temperature ranges. Ideal for cooling towers, process water, and oilfield applications.
  • hoffmann qb 20 biocide_e2e2fa9e
  • hoffmann qb 20 biocide_e2e2fa9e

Features Of Hoffmann QB-20 Biocide

  1. Broad-spectrum efficacy against bacteria, fungi, and algae in industrial water systems.

  2. Stable performance across a wide pH range (pH 4–10) and tolerant to common water treatment additives.

  3. Low foaming formulation suitable for high-shear and recirculating cooling water applications.

  4. Compatible with common corrosion inhibitors and scale control agents without compromising biocidal activity.

  5. Non-oxidizing chemistry minimizes material compatibility concerns with carbon steel, copper alloys, and stainless steels.

Typical Applications Of Hoffmann QB-20 Biocide

  1. Cooling water systems in power generation and HVAC facilities.

  2. Process water circuits in chemical manufacturing and petrochemical plants.

  3. Once-through and closed-loop industrial water systems requiring non-oxidizing biocide control.

  4. Make-up water treatment for evaporative condensers and cooling towers.

  5. Preventive biofouling control in heat exchangers and piping networks.

Specifications Of Hoffmann QB-20 Biocide

Chemical TypeNon-oxidizing heterocyclic biocide (isothiazolinone-based)
Product FormLiquid concentrate
AppearanceClear, pale yellow liquid
pH (as supplied)3.0 – 4.5
Density (20°C)1.08 – 1.12 g/cm³
SolubilityCompletely miscible with water
Storage Stability≥12 months at 5–30°C in original unopened container
Primary ApplicationsIndustrial cooling water, process water, and closed-loop systems


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