Item no.
NIST-8557
CAS Number
[7727-43-7]
Unit
0,5 g
Molecular formula
BaSO4
Molecular weight
233,39
Shipment details
No Dangerous Good /not restricted
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Description
This Reference Material (RM) is a material with known isotope-number ratios for sulfur (S), R( 34S/32S), and oxygen (O), R( 18O/ 16O). It is intended for use in method development, method harmonization and as a control for sulfur isotope-number ratios and oxygen isotope-number ratios of working standards that have been calibrated to the VCDT (Vienna Canon Diablo Troilite) and VSMOW-SLAP (Vienna Standard Mean Ocean Water - Standard Light Antarctic Precipitation) delta-scales. The equivalent name for this RM, as used by the International Atomic Energy Agency (IAEA) and the U.S. Geological Survey (USGS), is NBS127. A unit of RM 8557 (NBS127) consists of one bottle containing approximately 0.5 g of barium sulfate (BaSO4).
Structure formula
Contents
Miscellaneous
Certificate of Analysis (specimen)
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Product data sheet
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