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Sulfanilic acid azochromotrop is used as an indicator for complexometric determinations of zirconium and thorium. It is used as a reagent for drinking and wastewater analysis using Hach Method 8029, Fluoride, SPADNS Method.
JR Marier.; D Rose. The Fluoride Content of Some Foods and Beverages-a Brief Survey Using a Modified Zr-SPADNS Method. Journal of Food Science.196631 (6), 941-946.
M Greluk.; Z Hubicki. Sorption of SPADNS azo dye on polystyrene anion exchangers: equilibrium and kinetic studies. Journal of hazardous materials.2009172 (1), 289-297.
Indicator for complexometry: Z. Anal. Chem., 147, 105 (1955); 148, 349 (1955).
Gefahrenhinweise (EU): H315-H319-H335
Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation.
Avoid breathing dust/fume/gas/mist/vapours/spray. Wear protective gloves and eye/face protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.