Detergent research, sorbitol citrate

Detergent research, sorbitol citrate

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Credit: ELIZABETH KRIETMEYER/US DEPARTMENT OF AGRICULTURE/SCIENCE PHOTO LIBRARY

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Caption: EDITORIAL USE ONLY. Detergent research. Chemist performing a test to determine how much sorbitol citrate is needed to prevent limescale building up in kettles, washing machines, and other domestic appliances. Limescale consists of deposits of carbonates of calcium and magnesium, deposited from 'hard' water. It is thought that this chemical could be used as an inexpensive, environmentally friendly additive to detergents. Sorbitol citrate (a combination of a sugar alcohol and citric acid) is environmentally friendly because it is biodegradable and non-toxic. Photographed in the USA.

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