Gentaur pH 9.225 NIST Value Buffer Solution at 20°C - 500ml
https://www.bioguid.info/shop/fm-07-109225-gentaur-ph-9-225-nist-value-buffer-solution-at-20degc-500ml-8459
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NIST traceable pH 9.23 buffer solution, 500ml bottle, ensures high precision at 20°C.
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