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

Dow ROCIMA 303 Biocide

Dow ROCIMA 303 Biocide is a broad-spectrum, isothiazolinone-based antimicrobial agent from Dow’s ROCIMA™ portfolio. Designed for industrial water systems, it effectively controls bacteria, fungi, and algae. Offering rapid kill kinetics and excellent stability in high-hardness or high-pH environments, it ensures long-term system protection with low dosage requirements and minimal environmental impact.
  • dow rocima 303 biocide_391a3388
  • dow rocima 303 biocide_391a3388

Features Of Dow ROCIMA 303 Biocide

  1. Effective broad-spectrum biocide against bacteria, fungi, and algae in water-based systems.

  2. Low-toxicity formulation designed for compliance with major global regulatory frameworks including EU BPR and US EPA requirements.

  3. Excellent stability in alkaline and moderately hard water conditions, supporting long-term preservation performance.

  4. Compatible with common industrial surfactants, thickeners, and emulsifiers without compromising efficacy or formulation integrity.

  5. Non-oxidizing mode of action helps prevent corrosion and minimizes impact on system metallurgy.

Typical Applications Of Dow ROCIMA 303 Biocide

  1. Preservation of water-based metalworking fluids and coolants.

  2. Microbial control in industrial cleaning formulations and detergents.

  3. Protection of latex paints, coatings, and architectural finishes during storage and application.

  4. Stabilization of adhesives, sealants, and construction chemical products.

  5. In-process preservation of process water in papermaking and textile auxiliaries.

Specifications Of Dow ROCIMA 303 Biocide

Chemical TypeIsothiazolinone-based biocide (mixture of 5-chloro-2-methyl-4-isothiazolin-3-one and 2-methyl-4-isothiazolin-3-one)
Product FormAqueous solution
AppearanceClear, pale yellow liquid
pH (1% aqueous solution)2.5–4.5
Density (20°C)1.08–1.12 g/cm³
SolubilityMiscible with water and most polar organic solvents
Primary ApplicationsPreservation of water-based industrial formulations
Key FeaturesBroad-spectrum antimicrobial activity, low volatility, non-oxidizing


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