27130

Chromotrope 2B

for microscopy

• Synonym(s): 2-(4-Nitrophenylazo)chromotropic acid disodium salt, Acid Red 176
• Empirical Formula (Hill Notation): C₁₆H₉N₃Na₂O₁₀S₂
• CAS Number: 548-80-1
• Molecular Weight: 513.37
• Colour Index Number: 16575
• Beilstein/REAXYS Number: 4109733
• EC Number: 208-959-9
• MDL number: MFCD00003951
• UNSPSC Code: 12171500
• PubChem Substance ID: 329752979
• NACRES: MA.02

Properties

• grade: for microscopy
• Quality Level: 100
• form: powder or crystals
• mp: 300 °C
• solubility: water: 10 mg/mL
• ε (extinction coefficient): ≥500 at 509-519 nm in water
• application(s): diagnostic assay manufacturing; hematology; histology
• storage temp.: room temp
• SMILES string: [Na+].[Na+].Oc1cc(cc2cc(c(\N=N\c3ccc(cc3)[N+]([O-])=O)c(O)c12)S([O-])(=O)=O)S([O-])(=O)=O
• InChI: 1S/C16H11N3O10S2.2Na/c20-12-7-11(30(24,25)26)5-8-6-13(31(27,28)29)15(16(21)14(8)12)18-17-9-1-3-10(4-2-9)19(22)23;;/h1-7,20-21H,(H,24,25,26)(H,27,28,29);;/q;2*+1/p-2/b18-17+;;
• InChI key: AXUUHWJXDWBCSG-QIKYXUGXSA-L

Description

Application

Chromotrope 2B along with Chromotrope 2R, was used to give a highly colored radical anion, during the spectrophotometric determination of cephalosporins (cephadroxil (I), cephalexin (II) and cephradine (III)) in pharmaceutical products. It may be immobilized on AG 1-X8 ion exchange resin, used in flame atomic absorption spectrometry and inductively coupled plasma mass spectrometry (ICP-MS), done for the on-line preconcentration and determination of aluminium.

Safety Information

• Storage Class: 11 - Combustible Solids
• wgk_germany: WGK 3
• flash_point_f: Not applicable
• flash_point_c: Not applicable
• ppe: dust mask type N95 (US), Eyeshields, Gloves