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Certified reference materials (CRMs) manufactured and QC-tested in ISO-accredited labs satisfy your ISO requirements.
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Catalog #Conc. In Solvent And VolumeUnits
30401
2,000 μg/mL in P&T methanol, 1 mL/ampul
ea.
36404
3 mg/mL in dimethyl sulfoxide, 1 mL/ampul
ea.