SPADNS

Catalog No.	Quantity
AAA1693318	50 g
AAA1693309	10 g

Catalog No. AAA1693318 Supplier Thermo Scientific Chemicals Supplier No. A1693318

Description

CAS: 23647-14-5 | C16H10N2Na3O11S3+ | 571.408 g/mol

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.

Specifications

Chemical Identifiers

• CAS: 23647-14-5
• Molecular Formula: C16H10N2Na3O11S3+
• Molecular Weight (g/mol): 571.408
• MDL Number: MFCD00003952
• InChI Key: LSAWBVPBZOEGOT-UHFFFAOYSA-L
• Synonym: Sulfanilic acid azochromotrope; 2-(4-Sulfophenylazo)chromotropic acid trisodium salt
• PubChem CID: 73658865
• IUPAC Name: trisodium;5-hydroxy-4-oxo-3-[(4-sulfophenyl)hydrazinylidene]naphthalene-2,7-disulfonate
• SMILES: C1=CC(=CC=C1NN=C2C(=CC3=CC(=CC(=C3C2=O)O)S(=O)(=O)[O-])S(=O)(=O)[O-])S(=O)(=O)O.[Na+].[Na+].[Na+]

• Melting Point: >300°C
• Solubility Information: Soluble in water (10mg/ml),and ethanol (1mg/ml). very slightly soluble or insoluble in alcohol and organic solvents.
• Formula Weight: 570.41
• Quantity: 50 g
• Chemical Name or Material: SPADNS

Safety and Handling

Hazard Category	H315-H319-H335
Hazard Statement	GHS H Statement H315-H319-H335 Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation.
Precautionary Statement	P261-P264b-P271-P280-P302+P352-P304+P340-P305+P351+P338-P312-P332+P313-P362-P501c
EINECSNumber	245-803-9
TSCA	Yes
Recommended Storage	Ambient temperatures

SDS

RUO – Research Use Only