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SPADNS
SPADNS
SPADNS
Thermo Scientific Chemicals

SPADNS

CAS: 23647-14-5 | C16H10N2Na3O11S3+ | 571.408 g/mol
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Catalog number A16933.18
also known as A16933-18
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89,65
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Quantity:
50 g
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Price (EUR)
89,65
Online Exclusive
99,70
Save 10,05 (10%)
Each
Chemical Identifiers
CAS23647-14-5
IUPAC Nametrisodium (3E)-5-hydroxy-4-oxo-3-[2-(4-sulfonatophenyl)hydrazin-1-ylidene]-3,4-dihydronaphthalene-2,7-disulfonate
Molecular FormulaC16H9N2Na3O11S3
InChI KeyLSAWBVPBZOEGOT-ZOVWSQMSSA-K
SMILES[Na+].[Na+].[Na+].OC1=CC(=CC2=C1C(=O)\C(=N/NC1=CC=C(C=C1)S([O-])(=O)=O)C(=C2)S([O-])(=O)=O)S([O-])(=O)=O
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SpecificationsSpecification SheetSpecification Sheet
Appearance (Color)Dark red to brown to dark brown
CommentSuitable for the determination of zirconium
lambda-max (UV-Vis)505.0-510.0nm
FormCrystals or powder or crystalline powder
Loss on Drying≤10%
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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.

This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.

Applications
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.

Solubility
Soluble in water (10 mg/ml), and ethanol (1 mg/ml). very slightly soluble or insoluble in alcohol and organic solvents.

Notes
Store in cool place. Keep container tightly closed in a dry and well-ventilated place. Stable under recommended storage conditions.
RUO – Research Use Only

General References:

  1. 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.
  2. 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.
  3. Indicator for complexometry: Z. Anal. Chem., 147, 105 (1955); 148, 349 (1955).