C.I. Acid Yellow 1

C.I. Acid Yellow 1 structural formula

CAS Number846-70-8
Molecular FormulaC10H4N2Na2O8S
Molecular Weight358.191
InChI KeyCTIQLGJVGNGFEW-UHFFFAOYSA-L
LogP1.07
Synonyms
  • C.I. Acid Yellow 1
  • Disodium 5,7-dinitro-8-oxidonaphthalene-2-sulfonate
  • 2-Naphthalenesulfonic acid, 8-hydroxy-5,7-dinitro-, sodium salt (1:2)
  • 846-70-8
  • 1307 Yellow
  • 1422 Yellow
  • A.F. Yellow No. 1
  • Acid Leather Yellow NYS
  • Amacid Yellow S
  • Calcocid Yellow S
  • Dolkwal Naphthol Yellow S
  • Edicol Supra Yellow Y
  • EINECS 212-690-2
  • Ext D and C Yellow No. 7
  • Ext D&C Yellow 7
  • FD and C Yellow No. 1
  • Flavianic acid disodium salt
  • Flavianic acid sodium salt
  • Hispacid Yellow NSF
  • Japan Yellow 403-1
  • Japan Yellow No. 403-1
  • Java Naphthol Yellow S
  • Kca Naphthol Yellow S
  • Kiton Yellow S
  • Maple Naphthol Yellow S
  • Nankai Naphthol Yellow S
  • Naphthol Lake Yellow FY
  • Naphthol Yellow
  • Naphthol Yellow L
  • Naphthol Yellow S disodium salt
  • Naphthol Yellow S sodium salt
  • Naphthol Yellow S.FQ
  • Naphthol Yellow OS
  • Naphthol Yellow PL
  • Naphthol Yellow SEL 12
  • Naphthol Yellow SFQ
  • Naphthol Yellow SNA
  • Naphthol Yellow SXX
  • Naphtocard Yellow S
  • Naphtol Yellow S
  • NSC 4150
  • Paper Yellow L
  • Rakuto Naphthol Yellow S
  • Sodium, ((2,4-dinitro-7-sulfo-1-naphthalenyl)oxy)-, sodium salt
  • Sodium flavianate
  • Solar Yellow NY
  • Solar Yellow NY Conc
  • Solar Yellow NY, sodium salt
  • Transparent Yellow Lake 16091
  • Yellow Lake 71
  • Yellow No. 403
  • Zlut kysela 1
  • Zlut naftolova S
  • UNII-08F8S9O3I5
  • 2,4-Dinitro-1-naphthol-7-sulfonic acid, disodium salt
  • C.I. 10316
  • C.I. Food Yellow 1
  • Ext. D & C yellow no. 7
  • acid yellow 1
  • acid yellow S
  • sulfur yellow S
  • 82196-81-4

Applications:

Uv-Vis Spectrum of Naphthol Yellow S

April 7, 2026

Access the UV-Vis Spectrum SIELC Library

If you are looking for optimized HPLC method to analyze C.I. Acid Yellow 1 check our HPLC Applications library

For optimal results in HPLC analysis, it is recommended to measure absorbance at a wavelength that matches the absorption maximum of the compound(s) being analyzed. The UV spectrum shown can assist in selecting an appropriate wavelength for your analysis. Please note that certain mobile phases and buffers may block wavelengths below 230 nm, rendering absorbance measurement at these wavelengths ineffective. If detection below 230 nm is required, it is recommended to use acetonitrile and water as low UV-transparent mobile phases, with phosphoric acid and its salts, sulfuric acid, and TFA as buffers.
For some compounds, the UV-Vis Spectrum is affected by the pH of the mobile phase.  The compound was dissolved with water. This analysis was done with the mobile phase made of 20% acetonitrile and 80% water.

 

 

Application Analytes:
C.I. Acid Yellow 1
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.

Separation of C.I. Acid Yellow 1 on Newcrom R1 HPLC column

February 16, 2018
Separation of C.I. Acid Yellow 1 on Newcrom C18 HPLC column

C.I. Acid Yellow 1 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.

Application Column

Newcrom R1

The Newcrom columns are a family of reverse-phase-based columns. Newcrom A, AH, B, and BH are all mixed-mode columns with either positive or negative ion-pairing groups attached to either short (25 Å) or long (100 Å) ligand chains. Newcrom R1 is a special reverse-phase column with low silanol activity.

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Application Analytes:
C.I. Acid Yellow 1
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 before ordering the column as there may be a more suitable column alternative by either e-mail: support@sielc.com or by phone: 847-229-2629.