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O4505 Sigma-Aldrich

Orange II sodium salt

certified by the Biological Stain Commission

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 329818910

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Properties

Related Categories Cell Biology, Certified Stains & Dyes, Hematology and Histology, Stains and Dyes
grade   certified by the Biological Stain Commission
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

Suitability

Certified as a substitute for methyl orange in the Wilson-Ezrin method for pituitary acidophils; as a counterstain for Heidenhain′s or Weigert′s hematoxylin on paraffin sections; as a substitute for Orange G in Flemming′s triple stain.

Safety & Documentation

Safety Information

WGK Germany 
3
RTECS 
DB7084000

Documents

Certificate of Analysis (COA)

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Protocols & Articles
Peer-Reviewed Papers
15

References

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