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234087

Sigma-Aldrich

Potassium indigotrisulfonate

ozone-scavenging reagent

Synonym(s):

5,5′,7-Indigotrisulfonic acid tripotassium salt, Indigo-5,5′,7-trisulfonic acid tripotassium salt, Potassium indigotrisulfonate, Tripotassium indigo-5,5′,7-trisulfonate, tri-Potassium indigo-5,5′,7-trisulfonate

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About This Item

Empirical Formula (Hill Notation):
C16H7K3N2O11S3
CAS Number:
Molecular Weight:
616.72
Beilstein:
4932187
MDL number:
UNSPSC Code:
12171500
PubChem Substance ID:
NACRES:
NA.47

Quality Level

form

crystals or chunks

concentration

>60% (HPLC)

solubility

water: 0.1%

λmax

600 nm

application(s)

diagnostic assay manufacturing
hematology
histology

storage temp.

room temp

SMILES string

[K+].[K+].[K+].[O-]S(=O)(=O)c1ccc2NC(\C(=O)c2c1)=C3\Nc4c(cc(cc4S([O-])(=O)=O)S([O-])(=O)=O)C3=O

InChI

1S/C16H10N2O11S3.3K/c19-15-8-3-6(30(21,22)23)1-2-10(8)17-13(15)14-16(20)9-4-7(31(24,25)26)5-11(12(9)18-14)32(27,28)29;;;/h1-5,17-18H,(H,21,22,23)(H,24,25,26)(H,27,28,29);;;/q;3*+1/p-3/b14-13+;;;

InChI key

XOSMXDUITYWYGR-VPOCKCTCSA-K

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Application

Ozone-scavenging reagent that reacts rapidly with ozone.
Potassium indigotrisulfonate has been used:
  • in colorimetric method of measurement of atmospheric ozone
  • for measuring residual aqueous ozone by gas diffusion flow injection analysis.
  • to determine O3 concentration in water.

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Colorimetric determination of ambient ozone using indigo blue droplet.
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