C.I. Acid Orange 8, monosodium salt

C.I. Acid Orange 8, monosodium salt structural formula

CAS Number5850-86-2
Molecular FormulaC17H13N2NaO4S
Molecular Weight364.351
  • C.I. Acid Orange 8, monosodium salt
  • Sodium 4-[(E)-(2-hydroxynaphthalen-1-yl)diazenyl]-3-methylbenzene-1-sulfonate
  • Benzenesulfonic acid, 4-[(E)-2-(2-hydroxy-1-naphthalenyl)diazenyl]-3-methyl-, sodium salt (1:1)
  • 5850-86-2
  • C.I. Acid Orange 8
  • Acid Brilliant Orange R
  • Acid Orange 8
  • Airedale Orange R
  • Brilliant Orange R
  • Brilliant Orange RO
  • Calcocid Orange RR
  • Diacid Orange R
  • EINECS 227-458-6
  • Kayaku Acid Orange RO
  • Kiton Fast Orange 2R
  • Kiton Orange R
  • Naphthazine Orange R
  • NSC 51525
  • Orange T
  • Orange RO
  • Polycor Orange R
  • Shikiso Acid Orange RO
  • Solar Orange R
  • Tertracid Orange RO
  • Vondacid Orange RO
  • Wool Orange R
  • Yodogawa Acid Orange R


Separation of C.I. Acid Orange 8, monosodium salt on Newcrom R1 HPLC column

Separation of C.I. Acid Orange 8, monosodium salt on Newcrom C18 HPLC column

C.I. Acid Orange 8, monosodium salt can be analyzed by this reverse phase (RP) HPLC method with simple conditions. The mobile phase contains an acetonitrile (MeCN), water, and phosphoric acid. For Mass-Spec (MS) compatible applications the phosphoric acid needs to be replaced with formic acid. Smaller 3 µm particles columns available for fast UPLC applications. This liquid chromatography method is scalable and can be used for isolation impurities in preparative separation. It also suitable for pharmacokinetics.

The result was obtained by a proprietary SIELC algorithm. It may deviate from the actual experimental data. The experimental data are available upon request. Contact us by e-mail: support@sielc.com or by phone: 847-229-2629.
SIELC Technologies usually develops more than one method for each compound. Therefore, this particular method may not be the best available method from our portfolio for your specific application. Before you decide to implement this method in your research, please send us an email to research@sielc.com so we can ensure you get optimal results for your compound/s of interest.
Application Analytes:
C.I. Acid Orange 8, monosodium salt