Glass-ceramic: SCHOTT NEXTREMA® chemical resistance

Surface highly resistant to chemical attacks by acids and bases

This glass-ceramic material platform is resistant to acids and bases: NEXTREMA® is chemically resistant to acids and bases and a reliable material even in these aggressive environments. It meets all subsequent ISO and DIN standards in its chemical resistance to acids, bases and hydrolytic influences. The elimination of degradation enables reliable material behavior as well as stable process environments even under typical corrosive conditions. Such chemically resistant and base resistant glass-ceramic is used in all fields of industrial and product design.

Here are further details of the chemical properties:
Principal constituents (reference: DIN EN 1748-2-1)
The principal constituents of all the ceramic materials are as follows:



Percentage per mass  
Silicon dioxide SiO2 50 % – 80 %
Aluminium oxide Al2O3 15 % – 27 %
Lithium oxide Li2O 0 % – 5 %
Zinc oxide ZnO 0 % – 5 %
Titanium oxide TiO2 0 % – 5 %
Zirconium oxide ZrO2 0 % – 5 %
Magnesium oxide MgO 0 % – 8 %
Calcium oxide CaO 0 % – 8 %
Barium oxide BaO 0 % – 8 %
Sodium oxide Na2O 0 % – 2 %
Potassium oxide K2O 0 % – 2 %
Other (trace content on request)   0 % – 5 %
The materials do not contain any harmful substances according to the European
directive 2002/95/EC “Hazardous Substances in electrical and electronically
Equipment” and fulfill the terms of RoHS without any concerns.  

Federal Republic of Germany waste disposal regulations differentiate five classes
of waste, Z0 (non-restricted disposal), Z3 (household waste), and up to Z5 (highly toxic waste).
All NEXTREMA® materials are classified as non-restricted disposal. 
Local government regulations may differ. Please contact the local authority if
needed. NEXTREMA® must not be disposed of in recycling boxes for standard glass (e.g. glass bottles).    

End of life usage
The chemical resistance of NEXTREMA® is more extensive than that of most other
comparable materials.

Chemical resistance
Translucent bluegrey
Opaque grey
Translucent white
Opaque white
Hydrolytic Resistance
HGB (ISO 719)
1 1 1 1 1 1
Acid Resistance
S (DIN 12116)
2 2 2 2 1 1
Alkali Resistance
A (ISO 695)
1 2 2 1 1 1
1 = High resistance / low solubility
2 = medium resistance / medium solubility
3 = low resistance / high solubility
SCHOTT uses Cookies on this Website to enhance the user experience and provide the best possible Service. By continuing to browse the Website, you consent to our use of Cookies.

Dear visitor,

we’d like to invite you to participate in our survey regarding the usability of our web presence. Your feedback is important to us and will help us to further improve our information offer.

Please take the opportunity to share your opinion with us. It will only take 5 min of your time.

Thank you very much!
Your SCHOTT Online Team