Azoles - PMC Specialties Group - Cobratec

COBRATEC® brand Corrosion Inhibitors


COBRATEC® solids provide the highest level of active corrosion inhibitor, but can be the most difficult to handle.

Product Chemical Name Description
COBRATEC® BZ Benzotriazole Off-white flake
COBRATEC® TT100 Tolyltriazole Off-white prill
COBRATEC® CBT Carboxybenzotriazole Crystalline powder
COBRATEC® TT85 Sodium Tolyltriazole White powder

Alkaline Water Solutions:

COBRATEC® alkaline solutions are convenient solutions for use in aqueous systems. These products are widely used in the water treatment, engine coolant and metal working industries.

Product Chemical Name Description
COBRATEC® TT50S Sodium Tolyltriazole Amber solution
COBRATEC® TT55K Potassium Tolyltriazole Amber solution
COBRATEC® 40S Sodium Benzotriazole Amber solution

Liquid CO-Solvents:

The COBRATEC® CO-solvent products are liquid blends of the COBRATEC® solids dissolved in polar solvents. These products provide the handling ease of a liquid without the formation of an alkaline salt. The COBRATEC® CO-solvent products are used in inks, lubricants, compressor fluids, flooring, direct treatment of copper, transmission fluids and paints.

Product Chemical Name Solvent
COBRATEC® TT-25-EG Tolyltriazole Ethylene Glycol
COBRATEC® TT-35-G Tolyltriazole Propylene Glycol
COBRATEC® TT-35-I Tolyltriazole Isopropanol
COBRATEC® TT-40-DG Tolyltriazole Diethylene Glycol
COBRATEC® TT-50-A Tolyltriazole Triethanolamine
COBRATEC® 20-EG Benzotriazole Ethylene Glycol
COBRATEC® 35-G Benzotriazole Propylene Glycol
COBRATEC® 45-I Benzotriazole Isopropanol

Liquids: The 900 Series

The COBRATEC® Liquids are a unique blend of multiple azoles which are 90% active. The advantages include:

  • Ease of formulating (no solids handling)
  • 90% active liquids (the highest percentage of active available in liquid form)
  • Dissolves faster than solid COBRATEC®
  • Non-caustic
  • Non-dusting
  • Non-flammable
Product Metals Protected Comments
COBRATEC® 928 Copper, steel & aluminum Can also reduce cobalt leaching
COBRATEC® 926 Copper, steel & aluminum Like CO928, more economical
COBRATEC® 948 Copper, steel & aluminum Like CO928, more economical,
85% Active
COBRATEC® 937 Copper, some steel Can replace CO99 in many uses
COBRATEC® 939 Copper, some steel Can replace CO99 in many uses
COBRATEC® 911S Copper, steel & aluminum For oil-based systems,
40% active in Polyolester

Multi-metal Protection:
There are three ways to obtain protection on metals other than copper with COBRATEC® products.

  1. CO 928, 911S, 926, 948 – Aluminum Steel and Copper
    The premier triazole products for multi-metal protection are COBRATEC® 928, COBRATEC® 926, COBRATEC® 948 and COBRATEC® 911S. These products are effective in a variety of applications to protect aluminum and steel in addition to copper and copper alloys (brass, bronze), silver and cobalt.
  2. Copper and Pitting Control
    COBRATEC® products tie up copper ions. This eliminates copper deposition on other metals such as steel and aluminum, thereby preventing catastrophic failures caused by localized copper-initiated pitting corrosion.
  3. Synergism
    COBRATEC® BZ and COBRATEC® TT100 are active in multi-metal protection because they are synergistic with other corrosion inhibitors.


PMC Specialties Group has research capabilities including synthesis of molecules and development of processes using alkylation, amidation, chlorination, diazotization, esterification, hydrogenation, nitration, oxidation and sulfonation technologies. This custom capability combines a research staff, engineering team, and a skilled production staff to deliver the right intermediate to produce chemicals as a custom supplier in quantities ranging from single drum to truckload quantities.