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

Dow ROCIMA 520S Biocide

Dow ROCIMA 520S Biocide is a broad-spectrum, isothiazolinone-based antimicrobial preservative designed for water-based industrial formulations. It offers excellent efficacy against bacteria, fungi, and algae with low odor, high stability, and compatibility in paints, coatings, adhesives, and metalworking fluids. Part of Dow’s ROCIMA biocide portfolio, it ensures long-term protection and regulatory compliance in demanding applications.
  • dow rocima 520s biocide_0b07040a
  • dow rocima 520s biocide_0b07040a

Features Of Dow ROCIMA 520S 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 and scale inhibitors, enabling seamless integration into existing treatment programs.

  5. Non-oxidizing chemistry that avoids oxidative degradation of system components and polymers.

Typical Applications Of Dow ROCIMA 520S Biocide

  1. Industrial cooling water systems including open recirculating towers and closed loops.

  2. Process water circuits in pulp & paper manufacturing facilities.

  3. Oilfield produced water and secondary recovery injection systems.

  4. Paint, coating, and adhesive manufacturing process water and preservative blends.

  5. Textile dyeing and finishing auxiliaries where microbial stability is critical.

Specifications Of Dow ROCIMA 520S Biocide

Chemical TypeIsothiazolone-based non-oxidizing biocide
Product FormAqueous solution
AppearanceClear, light yellow liquid
Active Ingredient2-Methyl-4-isothiazolin-3-one (MIT) and 5-Chloro-2-methyl-4-isothiazolin-3-one (CMIT)
pH (as supplied)2.5–4.5
Density (20°C)1.08–1.12 g/cm³
Solubility in WaterCompletely miscible
Primary ApplicationsCooling water, process water, and industrial preservative systems


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