Hydrex™ Chemicals

Water treatment chemical programs for a variety of industrial and municipal applications
Water treatment chemical programs

Veolia Water Technologies provides comprehensive chemical services using its Hydrex™ line of chemical formulations.

Our more than 400 formulations help clients optimize the full water cycle, chemical consumption and operation & maintenance costs. Hydrex™ has a proven track record worldwide as an effective water treatment solution to:

  • Protect Against Scale Deposition, Corrosion and Fouling
  • Improve Water Treatment Efficiency
  • Reduce Unnecessary Downtime
  • Protect Asset Integrity
  • Reduce Environmental Risks
  • Increase Energy Savings

The Veolia Difference - Creating Water Efficiency Partnerships

Where Chemical Expertise, Impeccable Service, and Quality Chemical Technologies Meet

Using Hydrex™ our committed service staff will be able to identify synergies between customer operational goals and utility and water treatment equipment. Customers will have access to a dedicated service representative who will provide comprehensive care of your assets.

After performing an audit of the facility, our experts will propose the most efficient Hydrex™ treatment program. This customized approach ensures that the results of your chemical treatment program meet your operational goals and efficiently extend the life of your water-using equipment.

Veolia also offers alternative "green" technologies to reduce chemical usage, such as non-chemical treatment technologies, reverse osmosis systems for blow-down reduction, condensate polishers for recycling & reuse, and brine recovery systems.

MSDS Documentation Request for Hydrex

MSDS Global Incident Response Hotline Service

US: +1-760-476-3962 (Code: 333239)

USA/Canada Hydrex Key Contact Information:

US-Industrial Contact Info

US-Municipal Contact Info

Canada Industrial & Municipal Contact Info

Key Hydrex Treatment Capabilities

  • Boilers
  • Cooling Towers
  • Wastewater Systems
  • Potable Water Systems
  • Membrane Systems
  • Water Reuse
  • Production Additives
  • Heating/Air Conditioning Systems
  • Dust Control
  • Oil Wells

We Support Several Industries


  • Colleges & Universities
  • Hospitals & Healthcare
  • Commercial Properties


  • Mining
  • Oil & Gas
  • Food & Beverage
  • Chemicals
  • Pharmaceuticals
  • Personal Care / Cosmetics
  • Primary Metals
  • Cosmetics
  • Biofuels
  • General Industry
  • Power



HydrexTM Chemical Service Program Restores Pipe Condition, Prevents Corrosion, and Mitigates Scaling

PROJECT: Sulfuric Acid Plant 
LOCATION: United States


A Sulfuric Acid recovery plant was experiencing severe corrosion in their plant water supply piping. Two 2” galvanized supply lines feeding their production process were almost completely plugged, preventing water flow to the plant. The client was planning to perform a $1,000,000 CAPEX project to replace the failing infrastructure. Veolia was contacted by the client to see if there was a chemical services program that could mitigate the issue.


After performing a comprehensive facility audit, a pilot test on sacrificial sections of the corroded and plugged piping, Veolia found that a 20% solution of Hydrex 2978 which was circulated through the piping for approximately 30 hours was an effective solution to restore the pipe's condition. After the pilot, a full-scale program was installed at the customer site.


  • Heat exchanger water flow and efficiency restored
  • $1M Capital equipment replacement eliminated
  • Long-Term Prevention of Corrosion and Scaling

The Hydrex™ Product Line

Boiler Water Treatment Products
Hydrex 1000 Series

Ideal for boiler and heating applications in low, medium and high pressure boilers.

This product series includes:

  • Scale inhibitors
  • Corrosion inhibitors
  • Antifoams
  • Oxygen scavengers
  • Steam and condensate treatment
  • Green products

Cooling Water Treatment Products
Hydrex 2000 Series

Improves the efficiency and reliability in open, closed and once-through cooling water systems

This product series includes:

  • Scale inhibitors
  • Corrosion inhibitors
  • Dispersants
  • Antifoulants

Potable Water Treatment Products
Hydrex 3000 Series

Approved for potable water applications.

This product series includes:

  • Flocculants
  • Coagulants
  • Green chemistry
  • GRAS/NSF approved products

Membrane Treatment Products
Hydrex 4000 Series

Ideal for Reverse Osmosis, Nanofiltration, Ultrafiltration and Microfiltration treatment systems.

This product series includes:

  • Membrane antiscalants
  • Biocides
  • Chlorine removal chemicals
  • Cleaners
  • Antifoulants/Dispersants

Wastewater Treatment Products
Hydrex 6000 Series

Used in water purification, industrial process and both municipal & industrial wastewater treatment systems.

This product series includes:

  • Coagulants
  • Demulsifiers
  • Dewatering Aids
  • Flocculants
  • Antifoaming agents
  • Odor Control
  • Metals Removal
  • Green chemistry

Hydrex 7000 Series

Used to control the growth of bacteria, fungi and algae in cooling water, process water, recycled water and wastewater systems.

This product series includes:

  • Oxidizing and nonoxidizing products
  • Cooling and Process use registrations
  • Legionella prevention
  • Broad spectrum of products

Industrial Application Products
Hydrex 8000 Series

Intended for industrial processing applications.

This product series includes:

  • Chain lubricants
  • Food and beverage processing
  • Biofuels processing
  • Upstream oil & gas processing
  • C.I.P. cleaners
  • Mining processing

Other Chemical Applications
Hydrex 9000 Series

Solutions for each specific requirement in terms of chemical water conditioning including custom-made formulations.

This product series includes:

  • Thermal desalination
  • Dust control
  • Miscellaneous and bulk chemicals