5004600001 · Merck
Refractive index standard traceable to NIST, traceable to PTB, [α]/D 60°, Brix CERTIPUR®
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5004400001 · Merck
Refractive index standard traceable to NIST, traceable to PTB, [α]/D 40°, Brix CERTIPUR®
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5004200001 · Merck
Refractive index standard traceable to NIST, traceable to PTB, [α]/D 20°, Brix CERTIPUR®
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