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75370 Sigma-Aldrich

Orange II sodium salt

for microscopy (Hist.), indicator (pH 11.0-13.0)

Synonym: 4-(2-Hydroxy-1-naphthylazo)benzenesulfonic acid sodium salt, Acid Orange 7, Acid Orange A, Orange II, Tropaeolin 000 No. 2

  • CAS Number 633-96-5

  • Empirical Formula (Hill Notation) C16H11N2NaO4S

  • Molecular Weight 350.32

  •  Colour Index Number 15510

  •  Beilstein/REAXYS Number 3898201

  •  EC Number 211-199-0

  •  MDL number MFCD00011657

  •  PubChem Substance ID 329766389

  •  NACRES MA.02

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Properties

Related Categories Analytical Reagents, Analytical/Chromatography, Microscopy Reagents, Stains and Dyes
Quality Level   200
grade   for microscopy (Hist.)
  indicator (pH 11.0-13.0)
form   powder
application(s)   hematology: suitable
  histology: suitable
visual transition interval   11 - 13, yellow to orange-red
solubility   hot water: 0.5 g/10 mL, clear
εmax   ≥500 at 478.0-488.0 nm in water
Featured Industry   Diagnostic Assay Manufacturing
storage temp.   room temp
SMILES string   [Na+].Oc1ccc2ccccc2c1\N=N\c3ccc(cc3)S([O-])(=O)=O
InChI   1S/C16H12N2O4S.Na/c19-15-10-5-11-3-1-2-4-14(11)16(15)18-17-12-6-8-13(9-7-12)23(20,21)22;/h1-10,19H,(H,20,21,22);/q;+1/p-1/b18-17+;
InChI key   CQPFMGBJSMSXLP-ZAGWXBKKSA-M

Description

General description

Orange II is a sulfonated azo dye.

Application

It has been used in synthesis and characterization of Fe-doped aluminosilicate nanotubes with electron conductive properties.

Other Notes

Reagent for the extraction and spectrophotomeric determination of cationic surfactants

Safety & Documentation

Safety Information

Personal Protective Equipment 
RIDADR 
NONH for all modes of transport
WGK Germany 
WGK 3
RTECS 
DB7084000
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable

Documents

Certificate of Analysis (COA)

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Protocols & Articles
Peer-Reviewed Papers
15

References

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