GALDEN® HT 70

Econtrol Devices offers GALDEN® HT 70, a perfluoropolyether (PFPE) dielectric heat transfer fluid from the GALDEN HT product range by Solvay/Syensqo.

GALDEN HT 70 is a colorless, odorless, nonflammable liquid intended for industrial heat transfer applications. With a boiling point of 70°C, the fluid combines dielectric properties, chemical stability, and low viscosity.

According to the manufacturer's Technical Data Sheet, the GALDEN HT range consists of inert, dielectric heat transfer fluids with boiling points ranging from 55°C to 270°C. The range is designed for demanding applications in semiconductor manufacturing, chemical processing, pharmaceutical operations, and industrial cooling systems.

GALDEN HT 70 has a reported density of 1.68 g/cm³, kinematic viscosity of 0.50 cSt, and thermal conductivity of 0.065 W/m·K. These values are taken from the HT70 column of the manufacturer's technical comparison table.

Key Features of GALDEN HT 70

• PFPE Heat Transfer Fluid: Part of the GALDEN HT perfluoropolyether range.

• Dielectric Properties: Developed for industrial heat transfer applications involving electrical equipment.

• Boiling Point: 70°C.

• Nonflammable: Confirmed in the manufacturer's Safety Data Sheet.

• Chemical Stability: Identified as a feature of the GALDEN HT range.

• High Heat Resistance: Listed among the manufacturer's product-range features.

• Density: 1.68 g/cm³.

• Low Kinematic Viscosity: 0.50 cSt.

• Thermal Conductivity: 0.065 W/m·K.

• Specific Heat: 0.23 cal/g·°C.

• Dielectric Strength: 40 kV at a 2.54 mm gap.

• Dielectric Constant: 1.86.

• Pour Point: Below -110°C.

• Colorless and Odorless: Confirmed in the Safety Data Sheet.

• Industrial Applications: Identified for use as a heat transfer medium, solvent, and lubricant in the Safety Data Sheet.

Applications of GALDEN HT 70

The manufacturer's Technical Data Sheet identifies the following industrial application categories for the GALDEN HT PFPE fluid range.

1. Semiconductor Manufacturing

GALDEN HT fluids are intended for heat transfer applications in semiconductor manufacturing.

The manufacturer's technical documentation identifies dielectric properties and thermal stability as characteristics of this fluid range.

2. Chemical Industry

The GALDEN HT range is listed for heat transfer applications in chemical industry operations.

3. Pharmaceutical Industry

The manufacturer identifies pharmaceutical industry applications among the intended uses of GALDEN HT fluids.

Suitability for a particular pharmaceutical process must be evaluated according to the manufacturer's guidance and applicable requirements.

4. Vapor Phase Heating

Vapor phase heating is among the industrial applications listed in the GALDEN HT Technical Data Sheet.

5. Transformer and Supercomputer Cooling

The manufacturer identifies transformer and supercomputer cooling as applications of GALDEN HT fluids.

6. Recirculating Chillers

GALDEN HT fluids are listed for heat transfer applications involving recirculating chillers.

7. Nuclear Industry

The manufacturer's product literature also identifies nuclear industry applications for the GALDEN HT range.

Specific suitability must be evaluated for the intended system.

8. Industrial Solvent and Lubricant Uses

The GALDEN HT70 Safety Data Sheet identifies the following recommended uses:

• Heat Transfer Medium

• Solvent

• Lubricant

These uses are specified for industrial applications only.

Technical Specifications of GALDEN HT 70

The following values are taken from the HT70 column on page 3 of the supplied GALDEN HT PFPE Technical Data Sheet.

These are typical manufacturer-reported properties, determined at 25°C unless otherwise specified. They are not guaranteed product specifications.

Chemical Composition

According to the manufacturer's Safety Data Sheet (Version 2.09, dated January 12, 2024), GALDEN HT 70 is identified as a perfluorinated oligomer substance.

The Safety Data Sheet classifies GALDEN HT 70 as a substance rather than a mixture.

Heat Transfer Performance

Thermal Characteristics

The manufacturer's Technical Data Sheet reports:

• Boiling Point: 70°C

• Pour Point: Below -110°C

• Heat of Vaporization: 17 cal/g

• Specific Heat: 0.23 cal/g·°C

• Thermal Conductivity: 0.065 W/m·K

• Thermal Expansion Coefficient: 0.0011 cm³/cm³·°C

These values describe the reported thermal characteristics of GALDEN HT 70.

Temperature-Dependent Viscosity

The manufacturer's Technical Data Sheet includes a graph on page 2 showing how kinematic viscosity changes with temperature across the GALDEN HT range.

For GALDEN HT 70, the typical kinematic viscosity is 0.50 cSt at 25°C.

Thermal and Chemical Stability

The manufacturer identifies thermal and chemical stability as features of GALDEN HT PFPE fluids.

The Safety Data Sheet confirms that GALDEN HT 70 is stable under recommended storage conditions.

Temperature Considerations

The GALDEN HT range includes products with boiling points between 55°C and 270°C.

For GALDEN HT 70 specifically, the boiling point is 70°C and the pour point is below -110°C.

The Safety Data Sheet identifies thermal decomposition above 290°C, with a lower decomposition temperature of 260°C in the presence of titanium and its alloys.

These decomposition temperatures are safety information, not recommended operating temperatures.

Electrical Properties

GALDEN HT 70 is described as a dielectric heat transfer fluid.

The manufacturer's Technical Data Sheet reports:

These are typical manufacturer-reported values.

Material Compatibility

The GALDEN HT PFPE Technical Data Sheet includes a compatibility section on page 3 identifying metals, plastics, and elastomers.

Compatible Metals

The manufacturer lists the following materials:

• AISI 316

• Copper

• Brass

• Iron

• Nickel

• Aluminum

• Stainless Steel

• Bronze

Compatible Plastics

The manufacturer's technical documentation lists:

• Low-Density Polyethylene

• Polypropylene

• Polycarbonate

• ABS Copolymer

• Polyphenylene Oxide

• PET

• POM

• PTFE

• PVC

• PMMA

Compatible Elastomers

The manufacturer identifies:

• Butyl Rubber

• NBR

• EPDM

• Natural Rubber

• Silicone Rubber

• Fluorosilicone

Compatibility Precautions

The listed materials are taken from the manufacturer's GALDEN HT product-range compatibility table.

Compatibility should be evaluated for the specific materials and operating conditions involved.

Available Packaging Sizes

The supplied product screenshot identifies the following packaging options:

Packaging availability should be confirmed when requesting a quotation.

Storage and Handling

GALDEN HT 70 is intended for industrial use only.

Storage Guidelines

According to the manufacturer's Safety Data Sheet:

• Keep the product in properly labeled containers.

• Store away from heat and sources of ignition.

• Keep away from combustible materials.

• Keep away from incompatible substances.

• Polyethylene is identified as a suitable packaging material.

Handling Precautions

• Ensure adequate ventilation.

• Use appropriate personal protective equipment.

• Avoid overheating to prevent thermal decomposition.

• Take precautions against electrostatic charge buildup.

• Ensure equipment is electrically grounded before transfer operations.

• Clean and dry piping circuits and equipment before use.

• Follow good industrial hygiene practices.

Safety Information

According to the manufacturer's Safety Data Sheet dated January 12, 2024, GALDEN HT 70 is not classified as hazardous under the OSHA Hazard Communication Standard (HCS 2012, 29 CFR 1910.1200).

The Safety Data Sheet identifies the product as nonflammable and not explosive under the specified test conditions.

High-Temperature Precautions

The Safety Data Sheet reports a decomposition temperature above 290°C.

In the presence of titanium and its alloys, the decomposition temperature decreases to 260°C.

Thermal decomposition or fire may release hazardous substances, including:

• Gaseous Hydrogen Fluoride (HF)

• Fluorophosgene

Incompatible Materials

The Safety Data Sheet identifies:

• Non-Aqueous Alkalis

• Lewis Acids (Friedel-Crafts) above 100°C

• Aluminum and Magnesium in Powder Form above 200°C

Personal Protective Equipment

The manufacturer recommends:

• Chemical-resistant protective gloves

• Safety glasses with side shields

• Protective work clothing and safety shoes

• Appropriate respiratory protection when required

For operations where splashing may occur, tightly fitting safety goggles are recommended.

Environmental and Regulatory Information

Chemical Inventory Information

The manufacturer's Safety Data Sheet identifies GALDEN HT 70 on the following inventories:

• United States TSCA Inventory

• Canadian Domestic Substances List

• Australian Inventory of Industrial Chemicals

• Korean Existing Chemicals Inventory

• China's Existing Chemical Substances Inventory

• Japanese Chemical Inventories

• Philippines Inventory of Chemicals and Chemical Substances

• New Zealand Chemical Substances Inventory

• Taiwan Chemical Substance Inventory

The Safety Data Sheet also includes conditions regarding Japanese importation and European REACH compliance.

Environmental Precautions

The manufacturer identifies the following environmental hazard statement:

H413: May cause long-lasting harmful effects to aquatic life.

GALDEN HT 70 should not be released into drains, soil, or waterways.

The GALDEN HT PFPE product literature identifies zero ozone depletion potential as a characteristic of the fluid range.

Recycling and Disposal

The manufacturer's Safety Data Sheet provides waste handling and disposal instructions.

Disposal Guidelines

• Do not dispose of the product into sewers, soil, or water bodies.

• Follow applicable local, regional, and national waste disposal regulations.

• Incineration may be used where permitted by local regulations.

• Incineration facilities must include systems for neutralizing or recovering hydrogen fluoride.

• Empty containers may be landfilled where permitted by local regulations.

Fluid Reclamation Information

The supplied product screenshot includes information about TMC Industries' reclamation services for used fluorinated and PFPE fluids.

This is TMC Industries' service information and should not be interpreted as a reclamation service or guarantee provided directly by Econtrol Devices.

GALDEN HT 70 – Product Inquiries at Econtrol Devices

Econtrol Devices provides product information and quotation assistance for GALDEN® HT 70 Dielectric Heat Transfer Fluid.

For product specifications, technical documentation, packaging options, or quotations, contact Econtrol Devices.

Safety Information: GALDEN HT 70 is intended for industrial use only. Although it is not classified as hazardous under OSHA HCS, the Safety Data Sheet identifies potential long-lasting harmful effects to aquatic life and hazardous decomposition products when overheated. Review the manufacturer's current Technical Data Sheet, Safety Data Sheet, and product label before handling or using the fluid.