Soft borosilicate glass

Example analytes are listed below as a reference. Please download a current certificate at nist.gov/SRM for current analytes and certified values.
Silicon dioxide (Si0₂), Boron trioxide (B₂O₃), Sodium oxide (Na₂O), Aluminium dioxide (Al₂O₃), Barium oxide (BaO), Zinc oxide (ZnO), Potassium oxide (K₂O), Calcium oxide (CaO), Magnesium oxide (MgO), Strontium oxide (SrO), Iron oxide (Fe₂O₃), Titanium dioxide (TiO₂)

See certificate for values and more details at nist.gov/SRM.

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SRM is a registered trademark of National Institute of Standards and Technology