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

Defros D31 Preservative

Defros D31 Preservative is a broad-spectrum biocide from the Defros D-Series, specifically formulated for water-based industrial systems. It effectively controls bacteria, fungi, and algae without formaldehyde or isothiazolinones. Ideal for paints, coatings, adhesives, and metalworking fluids, it ensures long-term stability and compliance with global regulatory standards including REACH and EPA guidelines.
  • defros d31 preservative_d2fef9e1
  • defros d31 preservative_d2fef9e1

Features Of Defros D31 Preservative

  1. Broad-spectrum antimicrobial activity against bacteria, yeasts, and molds.

  2. pH-stable performance across a wide range of 4.0–9.5, suitable for diverse formulation environments.

  3. Low volatility and excellent thermal stability up to 120°C during processing.

  4. Compatible with common surfactants, thickeners, and chelating agents in aqueous systems.

  5. Non-oxidizing chemistry, minimizing risk of discoloration or degradation of sensitive actives.

Typical Applications Of Defros D31 Preservative

  1. Water-based architectural coatings and interior paints.

  2. Industrial maintenance coatings and protective primers.

  3. Adhesives and sealants for construction and assembly applications.

  4. Printing inks, especially aqueous flexographic and gravure formulations.

  5. Carpet and textile treatment solutions for microbial resistance.

Specifications Of Defros D31 Preservative

Chemical TypeBlend of isothiazolinone and benzisothiazolinone derivatives
Product FormLiquid concentrate
AppearanceClear to slightly hazy, pale yellow liquid
Active Content1.5% w/w (as total isothiazolinones)
pH (1% aqueous solution)3.5–5.0
Density (20°C)1.02–1.05 g/cm³
SolubilityCompletely miscible with water and polar organic solvents
Storage Stability≥24 months at 5–25°C in original sealed container


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