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Turmeric paper
Quick and easy determination of boric acid and borates

The test paper allows the quick and easy detection of boric acid and borates. It is impregnated with curcumin, the yellow dye extracted from the roots of Curcuma tinctoria (yellow ginger). The paper is dipped into the sample containing hydrochloric acid (pH 1-2). Afterwards it is allowed to dry. In presence of borate the paper turns orange to red. Dipping into conc. sodium hydroxide causes a green-black color. In the absence of borate, sodium hydroxide leads to a brown-red color.

Product data and ordering information
Type Qualitative test paper
Presentation Pack of 200 strips 20x70 mm
Color reaction yellow → red
Limit of sensitivity 20 mg/L B
REF 90747
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