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S9256

Sigma-Aldrich

Sulfanilic acid azochromotrop

≥80%

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Synonym(s):
1,8-Dihydroxy-2-(4-sulfophenylazo)naphthalene-3,6-disulfonic acid trisodium salt, 2-(4-Sulfophenylazo)-1,8-dihydroxy-3,6-naphthalene disulfonic acid trisodium salt, 2-(4-Sulfophenylazo)chromotropic acid trisodium salt, SPADNS
Empirical Formula (Hill Notation):
C16H9N2Na3O11S3
CAS Number:
23647-14-5
Molecular Weight:
570.41
EC Number:
245-803-9
MDL number:
MFCD00003952
PubChem Substance ID:
24899830
NACRES:
NA.47

Quality Level

200

Assay

≥80%

form

powder

composition

Carbon: 26.0-35.0%

Nitrogen: 3.6-5.9%

color

dark red

solubility

water: 10 mg/mL

λmax

505-510 nm

application(s)

diagnostic assay manufacturing
hematology
histology

storage temp.

room temp

SMILES string

[Na+].[Na+].[Na+].Oc1cc(cc2cc(c(\N=N\c3ccc(cc3)S([O-])(=O)=O)c(O)c12)S([O-])(=O)=O)S([O-])(=O)=O

InChI

1S/C16H12N2O11S3.3Na/c19-12-7-11(31(24,25)26)5-8-6-13(32(27,28)29)15(16(20)14(8)12)18-17-9-1-3-10(4-2-9)30(21,22)23;;;/h1-7,19-20H,(H,21,22,23)(H,24,25,26)(H,27,28,29);;;/q;3*+1/p-3/b18-17+;;;

InChI key

AEHGQXKBQBMQEK-GLCFPVLVSA-K

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General description

Sulfanilic acid azochromotrop is commonly known as SPADNS.

Application

Sulfanilic acid azochromotrop, commonly known as SPADNS, is used mostly as an indicator for complexometric determinations of transition metals like zirconium. It is used as a reagent for drinking and wastewater analysis.

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Mammalian Proteasome Subpopulations with Distinct Molecular Compositions and Proteolytic Activities*
Oliver Drews
Molecular and Cellular Proteomics (2007)
Mechanism of azo dye degradation in Advanced Oxidation Processes: Degradation of Sulfanilic Acid Azochromotrop and its parent compounds in aqueous solution by ionizing radiation
Tamas Palfi
Radiation Physics and Chemistry (2011)
Sanjit Saha et al.
Physical chemistry chemical physics : PCCP, 19(42), 28588-28595 (2017-10-19)
The surface electronic properties of graphene oxide (GO) were modified through reduction and functionalization. Non-covalent functionalization was found to be superior compared to covalent functionalization due to the formation of few-layer graphene with a low defect content and average crystalline

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