Stock Photo - Female analytical chemist, gray hair, 50-55 years, filling a chemical mixture of water and Potassium ferrocyanide into a glass container, Wattens, Innsbruck Land, Tyrol, Austria

Stock Photo: Female analytical chemist, gray hair, 50-55 years, filling a chemical mixture of water and Potassium ferrocyanide into a glass container, Wattens.

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