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Notice: Borosilicate Glass Maximum Temperatures

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Often we get asked about the working temperature range of borosilicate glass, so the below information is handy to know when purchasing glassware for heating or testing purposes.

Borosilicate glass has excellent thermal properties at both high and low temperatures. The maximum recommended working temperature for borosilicate laboratory glassware is approx 500°C (for short periods of time only).

Borosilicate glass also performs well at lower temperatures. This glass can withstand conditions down to -190°C and is suitable for use with liquid nitrogen. In normal laboratory use, temperatures of -70°C are easily sustained for lengthy periods.

Special care should always be taken to avoid sudden changes in glass temperature as this may fracture the glass, and cooling should be achieved in a slow uniform manner.

Technical specifications:

Working point = 1252°C
Softening point = 821°C
Annealing point = 565°C
Strain point = 510°C
Recommended usage point = Below 500°C

Further data available from PYREX
http://www.scilabware.com/page.asp?id=Glasstech2


 

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