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HELM is represented with branches and sales offices in more than 30 countries.

Also known under the product name:

  • 1H-Benzotriazole
  • Azimidobenzole

CAS-Nr.: 95-14-7



1,2,3-Benzotriazole forms a strong anti-corrosion film on metals.

Oliver Leptien

Executive Manager

Tel +49 40 2375-1220

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1,2,3-Benzotriazole forms a strong, wipe and cleaning resistant protection film on copper, its alloys and other metals. Neither does it influence the original appearance of the metal nor its conductibility of heat and electricity. The protective layer is wipe and cleaning resistant and leaves no greasy film. 1,2,3-Benzotriazole is mainly used as corrosion inhibitor in coolants, metalworking and hydraulic fluids and various water treatment applications.

Examples of applications

Benzotriazole is mainly used in the chemical industry to protect copper from being contaminated in order to safe its purity.


  • 25 kg bags

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