钨酸,Tungstic acid;99%
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碳酸钙,Calcium carbonate;puriss., meets analytical specification of Ph. Eur., BP, USP, FCC, E170, precipitated, 98.5-100.5% (based on anhydrous substance)
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碘酸钾,Potassium iodate;certified reference material for titrimetry, certified by BAM, ≥99.5%
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丁香酚,Eugenol;Pharmaceutical Secondary Standard; Certified Reference Material