HHT

HHT, or 1,3,5-Trihydroxyhexahydrotriazine, is a formaldehyde-free, non-oxidizing biocide used primarily in metalworking fluids, industrial water systems, and coatings. It provides broad-spectrum control against bacteria, fungi, and yeasts with excellent stability in alkaline environments.

Overview

HHT (1,3,5-Trihydroxyhexahydrotriazine) is a non-formaldehyde-releasing biocide designed for long-lasting protection in water-based industrial systems. Unlike traditional formaldehyde donors, HHT offers a safer alternative while maintaining high efficacy against Gram-positive and Gram-negative bacteria. It functions by disrupting microbial cell walls and metabolic processes, delivering quick knockdown and prolonged inhibition. HHT is non-corrosive, non-oxidizing, and thermally stable, making it an ideal preservative for use in alkaline formulations, particularly in metalworking fluids, paints, and detergent systems. HHT is widely favored as an in-can preservative and process biocide due to its non-foaming, low-odor profile and superior compatibility with formulation components. It is effective at low dosages, rapidly biodegradable, and poses minimal environmental impact when used as directed.

Benefits

  • Formaldehyde-Free – Safer for users and environmentally preferred

  • Broad-Spectrum Efficacy – Works against bacteria, fungi, and yeasts

  • Excellent Alkaline Stability – Performs well in pH ranges up to 10

  • Low Odor, Non-Foaming – Ideal for clean, stable formulation profiles

  • Readily Biodegradable – Reduces ecological impact upon disposal

  • High Compatibility – Integrates seamlessly into emulsions and complex blends

Applications

  • Metalworking Fluids – Controls microbial growth in cutting, grinding, and forming fluids

  • Paints & Coatings – Preserves water-based emulsions during storage and application

  • Industrial Cleaners & Detergents – Maintains microbial integrity in alkaline formulations

  • Adhesives & Sealants – Prevents microbial spoilage in synthetic emulsions

  • Textile & Leather Processing – Inhibits bacterial and fungal contamination

  • Construction Chemicals – Extends shelf life of grouts, mortars, and cement additives

Properties Table

PropertyDetails
Product NameHHT
Chemical Name1,3,5-Trihydroxyhexahydrotriazine
Chemical TypeNon-formaldehyde organic biocide
Active IngredientHHT (typically ≥98%)
Physical FormLiquid
AppearanceClear to slightly yellow liquid
OdorMild to no odor
pH (Neat)~9.0 – 10.5
SolubilityFully soluble in water
Density @ 25 °C~1.15 g/cm³
Flash Point>100°C
Recommended Use Level200 – 1000 ppm depending on formulation
pH Stability Range7 – 10.5
Shelf Life12 months in sealed container
Packaging Options25 kg drums, 200 kg drums, 1000 kg IBCs

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