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Merck
CN

S9256

Sulfanilic acid azochromotrop

≥80% purity, powder

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

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About This Item

Empirical Formula (Hill Notation):
C16H9N2Na3O11S3
CAS Number:
23647-14-5
Molecular Weight:
570.41
NACRES:
NA.47
PubChem Substance ID:
24899830
UNSPSC Code:
12171500
EC Number:
245-803-9
MDL number:
MFCD00003952

Key Documents

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Product Name

Sulfanilic acid azochromotrop, ≥80%

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

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

assay

≥80%

form

powder

composition

Carbon: 26.0-35.0%

Nitrogen: 3.6-5.9%

technique(s)

titration: suitable

color

dark red

solubility

water: 10 mg/mL

λmax

505-510 nm

application(s)

diagnostic assay manufacturing
hematology
histology

storage temp.

room temp

Quality Level

200

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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.

General description

Sulfanilic acid azochromotrop is commonly known as SPADNS.

Storage Class

11 - Combustible Solids

wgk

WGK 3

ppe

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
0000509771
0000509771
0000508756
0000508756
0000506002

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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)
Mammalian Proteasome Subpopulations with Distinct Molecular Compositions and Proteolytic Activities*
Oliver Drews
Molecular and Cellular Proteomics (2007)
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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