Dodecylguanidine Hydrochloride (DGH)
- a unique active ingredient

Advantages of DGH

  • Proven compatibility for water treatment, polymer emulsions and detergents*
  • Broad pH application range (4-12)
  • Chemically stable
  • No formaldehyde, no AOX
  • Within dosage recommendation completely soluble in water
  • BfR approvals for applications with food contact (BfR XIV, BfR XXXVI)
  • No sensitizer -> No H 317 limit

Due to cationic nature of DGH the compatibility with anionic or non ionic chemicals should be tested

* We support the testing & development of DGH in other applications, such as Paints & Coatings or Glues. Please contact us!

Special advantages for water treatment

- Strong against biofilm, sulfate reducing bacteria and Legionella

- Non-oxidizing agent

- Compatible with chlorine and typical active ingredients in water treatment

DGH has a double mode of action. It breaks up the biofilm and kills isolated bacteria by membrane disruption.



It can be used in two ways

1) Everyday biocide

  • DGH can be used as regular biocide to effectively control microbial growth
  • Comparable treatment costs to CMIT/MIT
  • Can be combined with other biocide for increased efficacy spectrum

2) Specialty biocide

  • Use as add-on to your regular biocidal program, e.g. for
  • Highly contaminated systems
  • Weekly system clean-up

A surface-active mechanism

DGH controls planktonic bacteria as well as biofilm

  • DGH is a cationic surfactant, so a surface active agent with a postively(+) charged hydrophilic head
  • The surface activity of DGH is important to control aerobic and anaerobic bacteria (SRB) and biofilm
  • Two modes of action
    1. Kills isolated bacteria by membrane disruption
    2. Breaks up biofilm (especially relevant for Water Treatment)
  • Synergistic action with other assets. (or in the literal translation)

  • Dosage level starting at 15 ppm
  • The active surface properties maintains products and cleaning systems & being effective also against biofilms.

Different formulations





N-2000 Antimicrobial


N-2001 Antimicrobial


Preventol ® DP 1021




DGH formulation with broad application spectrum


More economical solution for water treatment, available in drums

Combination with strong non-oxidizing bactericide: enhanced antimicrobial efficacy


Product composition


35% DGH in dipropylene glycol and propylene glycol


35 % DGH in isopropanol and water


10 % DGH + 
21 % Bronopol in water


Suitable for

  • Water treatment
  • Detergents
  • Polymer Emulsions
  • Water treatment

  • Water treatment
  • Detergents
  • Polymer Emulsions (to be tested)

pH application range


< 12


< 12


< 9


Flash Point




35º C




Frost resistance

Crystallization possible below~ 15°C


Crystallization possible below~ 15°C

Crystallization possible below ~ 5°C


Chlorine tolerance






< 5 ppm residual chlorine


Available packaging

25 kg can

1020 kg IBC


193 kg drum


 1134 kg IBC


Consistently high quality independent of appearance 

  • Flocculation and different colors

Neither the color nor the solids affect the effectiveness. Flocculation does not affect active substance content.

  • Turbidity

Product may turn turbid and therefore is best suited for opaque applications.

  •  Frosting

“Frosting” can occur < 15°C. Completely reversible by increasing product temperature.