Antifrogen® SOL HT
A ready-to-use solution for solar heating systems based on higher boiling glycols

Antifrogen® SOL HT

A ready-to-use solution for solar heating systems based on higher boiling glycols

Edition Date :
January 27, 2020

Antifrogen® SOL HT is a physiologically harmless, yellowish, clear liquid based on an aqueous solution of higher boiling glycols, which is used as a heat transfer medium in solar heating systems, also those exposed to high thermal loads. The product is inhibited without the use of nitrites-, borates-, silicates- and phosphates. It meets the requirements of DIN 4757, part 3, for solar heating systems. The optimization of the corrosion inhibition system was performed without the use of CMR-substances (cancerogenic, mutagenic, reprotoxic).

Read more about Clariant Heat Transfer Fluids Find a distributor
  • Based on higher boiling glycols plus anti-corrosion additives
  • Permanent usage temperatures: approx. -23 to +200 °C
  • Premixed with deionized water (frost resistance: approx. -23 °C)
  • Typical applications: Solar heating systems, even highly stressed collectors with vacuum tubes resp. solar heating systems exposed to high thermal loads
  • Water hazard class WGK 1 (slightly water-polluting)
Flash point (DIN 51758) °C > 105 (not determined)
Ignition temperature (DIN 51794)  °C  > 420 
Temperature class (DIN/VDE 0165)     T2

Antifrogen® SOL HT has neither a flash point nor a fire point.

Spent Antifrogen® SOL HT can be disposed of in accordance with local regulations. According to the 2nd general administrative regulation relating to the German waste management act of 10.04.1990, reuse is preferable to disposal. The product is recyclable. Higher boiling glycols, the product on which Antifrogen® SOL HT is based, is classified in water hazard class WGK 1 (slightly water-polluting) according to the list of water-polluting substances (VwVwS from 17.05.1999).
Density at 20°C (DIN 51757) 




Refractive index at 20°C (DIN 51423, Part 2)  



pH-Value undiluted (DIN 51369)    


Reserve alcalinity (ASTIM D 1121)  

ml c (HCI) 0.1m

at least 4

Boiling point at 1013mbar (ASTM D 1120)  


approx. 105

Pour point (DIN 51597)  


approx. -28

Kinematic viscosity (DIN 51562)



approx. 7.4
approx. 1.44

Freezing Point (ASTM D 1177)


approx. 23

Specific heat



approx. 3.2

Thermal conductivity



approx. 0.36 

Specific electrical conductivity




Antifrogen® SOL HT was developed especially for use as a heat transfer medium in solar systems. The product is physiologically harmless.

According to our experience Antifrogen® SOL HT can be used in installations for many years. However, the Antifrogen® SOL HT concentration in the installation should be checked annually. This check is also advisable when the installation is topped up with liquid. The reference source for Brix refractometer and Antifrogen data slider can be provided upon request.
The performance of the Antifrogen® SOL HT should also be checked at intervals of two years. If a 250 ml sample is provided, the distributors can also perform this service. 

Antifrogen ® SOL HT is supplied by our Antifrogen® distributors in road tankers, non-returnable corrugated drums (220 kg), intermediate bulk containers (IBC, 1050 kg), and diverse small containers. Further information about our Antifrogen® distributors you can find on our homepage .
Antifrogen® SOL HT has a storage stability of two years if stored in closed original packaging. As zinc is not resistant to Antifrogen® SOL HT, this should be considered when the product is transferred to other containers.

Download File

Please enter your contact details and the file will start downloading immediately after your details have been submitted. This only has to be done for the first file you download on this site. Thank you for your understanding.

Personal Information

SDS Antifrogen® SOL HT

Please choose one of the available packing options:
No SDS files are available for this product.
Technical Support
+49 (0) 8679 7 17046

Request to Clariant

Related products

Request to Clariant

Please enter your contact information so we are able to process your request. Thank you for your interest.

Technical Support
+49 (0) 8679 7 17046
This information corresponds to the present state of our knowledge and is intended as a general description of our products and their possible applications. Clariant makes no warranties, express or implied, as to the information’s accuracy, adequacy, sufficiency or freedom from defect and assumes no liability in connection with any use of this information. Any user of this product is responsible for determining the suitability of Clariant’s products for its particular application.<br />
<br />
* Nothing included in this information waives any of Clariant’s General Terms and Conditions of Sale, which control unless it agrees otherwise in writing. Any existing intellectual/industrial property rights must be observed. Due to possible changes in our products and applicable national and international regulations and laws, the status of our products could change. Material Safety Data Sheets providing safety precautions, that should be observed when handling or storing Clariant products, are available upon request and are provided in compliance with applicable law. You should obtain and review the applicable Material Safety Data Sheet information before handling any of these products. For additional information, please contact Clariant.<br />
<br />
* For sales to customers located within the United States and Canada the following applies in addition: No express or implied warranty is made of the merchantability, suitability, fitness for a particular purpose or otherwise of any product or service.<br />
<br />
© Trademark of Clariant registered in many countries.<br />
® 2019 Clariant International Ltd 

You are about to leave the Clariant domain

The link you activated will take you outside the Clariant site in about 10 seconds. If you want to stop this, press "Cancel".