234087

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
• Empirical Formula (Hill Notation): C₁₆H₇K₃N₂O₁₁S₃
• CAS Number: 67627-18-3
• Molecular Weight: 616.72
• UNSPSC Code: 12171500
• NACRES: NA.47
• PubChem Substance ID: 24854018
• MDL number: MFCD00013160
• Beilstein/REAXYS Number: 4932187

Properties

• Quality Segment: 100
• form: crystals or chunks
• concentration: >60% (HPLC)
• technique(s): titration: suitable
• 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

Description

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.

Safety Information

• Storage Class: 11 - Combustible Solids
• WGK: WGK 3
• Flash Point (°F): Not applicable
• Flash Point (°C): Not applicable
• PPE (personal protective equipment): Eyeshields, Gloves, type N95 (US)