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23647-14-5 - SPADNS - Sulfanilic acid azochromotrope - 2-(4-Sulfophenylazo)chromotropic acid trisodium salt - A16933 - Alfa Aesar


Numéro CAS
Sulfanilic acid azochromotrope
2-(4-Sulfophenylazo)chromotropic acid trisodium salt

Dimensions Prix ($) Quantité Disponibilité
10g 29,30
50g 102,00
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Propriétés chimiques

Poids formulaire
Point de fusion
Soluble in water (10 mg/ml), and ethanol (1 mg/ml). very slightly soluble or insoluble in alcohol and organic solvents.


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.


Store in cool place. Keep container tightly closed in a dry and well-ventilated place. Stable under recommended storage conditions.

Références bibliographiques

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).

Mentions de danger et de prudence du SGH

Mentions de danger (UE): H315-H319-H335

Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation.

Mentions de prudence: P261-P280a-P305+P351+P338-P304+P340-P312a-P321-P332+P313-P405-P403+P233-P501a

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. Specific treatment (see label). If skin irritation occurs: Get medical advice/attention. Store locked up. Store in a well-ventilated place. Keep container tightly closed. Dispose of contents/container in accordance with local/regional/national/international regulations.

Autres références

Code tarifaire harmonisé


  • A10415

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  • A10520

    Pentaerythritol, 98+%
  • L09658

    Tetramethylammonium hydroxide pentahydrate, 98%
  • 39524

    Potassium antimonate trihydrate, 94+%
  • 86108

    Zirconium dichloride oxide hydrate, 99.9% (metals basis)

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