40% Ethylene Glycol Solution

40% Ethylene Glycol Solution Without Additives

What Is This Product

A 40% ethylene glycol solution consists of 40 parts by weight of ethylene glycol and 60 parts by weight of distilled water.
For example, 100 kg of finished solution contains 40 kg of ethylene glycol and 60 kg of distilled water.
The product is supplied already prepared, so there is no need to mix concentrated ethylene glycol with water on site to obtain a 40% solution.
However, this product is not a formulated inhibited heat transfer fluid.
It contains no:

• corrosion inhibitors;
• antifoaming agents;
• stabilizing additives;
• other functional components typically used in formulated heat transfer fluids.

Applications of 40% Ethylene Glycol Solution

The product can be used:

• as a process raw material;
• as a component in industrial production;
• for further manufacture of other products;
• for preparing proprietary formulations;
• in process equipment that permits the use of an uninhibited aqueous ethylene glycol solution;
• in processes requiring ethylene glycol at a specified concentration.

Suitability for specific equipment depends on its design, materials of construction, and the equipment manufacturer’s requirements.

Key Specifications

* The temperature is given as a reference value for an aqueous ethylene glycol solution containing 40 wt.% ethylene glycol. For a specific batch, use the product documentation.

Crystallization Onset Temperature

For an aqueous ethylene glycol solution containing 40 wt.%, the reference crystallization onset temperature is approximately −24 °C.
Crystallization onset does not mean that the entire volume freezes solid immediately.

A detailed description of how the crystallisation onset temperature varies with concentration can be found in the article ‘Ethylene glycol solution’ in the Reference Centre

Other Concentrations Available

LLC “AO Khimprom” manufactures aqueous ethylene glycol solutions in different concentrations.
This allows customers to order the required ratio of ethylene glycol to distilled water without preparing large volumes of solution themselves.
When ordering, specify:

• required concentration;
• required quantity;
• preferred packaging.

Products in this category are manufactured without a functional additive package.

Ethylene Glycol Solution vs. FREEZLIGHT®

These are different products.
Ethylene Glycol Solution
Composition:
ethylene glycol + distilled water.
No functional additives are included.
The product is intended primarily for industrial processes, manufacturing, and applications where an aqueous ethylene glycol solution of a specified concentration is required.
FREEZLIGHT® Heat Transfer Fluid
FREEZLIGHT® contains an aqueous ethylene glycol base combined with a specially selected functional additive package.
If a circulation system requires corrosion protection and other functional properties, choose a formulated heat transfer fluid rather than a plain ethylene glycol solution.
The Novohim range includes FREEZLIGHT® ethylene glycol-based heat transfer fluids for different temperature conditions.

When a Solution Without Additives Is Appropriate

40% Ethylene Glycol Solution is suitable when:

• a concentration of 40 wt.% is required;
• additives are not required by the process;
• the product is used as a raw material;
• the customer formulates the final product independently;
• the equipment permits the use of an uninhibited aqueous ethylene glycol solution;
• there is no need for a formulated heat transfer fluid with a functional additive package.

When to Choose a Formulated Heat Transfer Fluid

A formulated FREEZLIGHT® heat transfer fluid is more appropriate when a ready-to-use working fluid is required for a heating, cooling, or heat transfer system that requires a functional additive package.
Selection should take into account the operating temperature, system design, and equipment manufacturer’s requirements.

You can find out more about propylene glycol solutions, as well as the relationship between freezing point and density, by following the link

Limitations

Ethylene glycol is toxic. Product selection must therefore take into account the risk of contact with people, animals, food products, or potable water.
40% Ethylene Glycol Solution should not automatically be used:

• as a replacement for a formulated inhibited heat transfer fluid;
• in systems requiring corrosion inhibitors;
• where there is a risk of contamination of potable water or food products;
• as automotive antifreeze;
• in applications requiring specific approvals;
• without checking the equipment manufacturer’s requirements.

The properties of concentrated ethylene glycol should not be automatically attributed to a 40% aqueous solution.

Material Compatibility and Equipment Use

Before use, check the equipment manufacturer’s requirements for the working fluid.
Consider the materials used in:

• piping;
• heat exchangers;
• pumps;
• seals;
• gaskets;
• membranes;
• soldered joints;
• sealants.

Because the product contains no corrosion inhibitors, it should not be described as providing the corrosion protection of a formulated inhibited heat transfer fluid.

Preparation for Use

If the solution is used as a working fluid in a process circuit:

1. Confirm that an aqueous ethylene glycol solution without additives is permitted.
2. Remove the previous working fluid.
3. Clean the system if necessary.
4. Remove as much residual water as possible if maintaining the specified concentration is important.
5. Check the system for leaks.
6. Fill the system with the prepared solution.
7. Ensure proper circulation.

Residual water in the system reduces the actual ethylene glycol concentration and changes the crystallization onset temperature.

Does the 40% Solution Need to Be Diluted

If a concentration of 40 wt.% is required, no additional dilution is necessary.
Adding water reduces the ethylene glycol concentration and changes the properties of the solution.
If another concentration is required, a ready-made solution with the specified ratio of ethylene glycol to distilled water can be manufactured to order.

Storage and Safety

Ethylene glycol is toxic if swallowed.
Store the product in tightly closed, clearly labelled containers, separately from food products and in areas inaccessible to unauthorized persons.
Follow the Safety Data Sheet and use appropriate personal protective equipment according to the working conditions.

Frequently Asked Questions

What does the 40% ethylene glycol solution contain?
Ethylene glycol and distilled water.
The ethylene glycol concentration is 40 wt.%.
What is the crystallization onset temperature?
For an aqueous solution containing 40 wt.% ethylene glycol, the reference value is approximately −24 °C.
Does the product contain corrosion inhibitors?
No. It contains no corrosion inhibitors or other functional additives.
Is this a ready-to-use heat transfer fluid for a heating system?
It is a prepared aqueous ethylene glycol solution of a specified concentration, but it is not a formulated inhibited heat transfer fluid.
If the system requires a functional additive package, choose the appropriate formulated heat transfer fluid.
Can I order another concentration?
Yes. Aqueous ethylene glycol solutions of other concentrations can be manufactured to order.
Are additives included in solutions of other concentrations?
No. When an aqueous ethylene glycol solution is ordered, it consists of ethylene glycol and distilled water without a functional additive package.

Novohim offers a ready-made 40 wt.% ethylene glycol solution in distilled water without functional additives.
Other concentrations can also be manufactured to order.

If you need to prepare solutions independently, concentrated ethylene glycol is also available.
If a ready-to-use working fluid with a functional additive package is required, choose the appropriate FREEZLIGHT® ethylene glycol-based heat transfer fluid.