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70540 Sigma

Naphthol Yellow S

for microscopy (Hist.), for the precipitation (of amino acids and peptides)

Synonym: 2,4-Dinitro-1-naphthol-7-sulfonic acid sodium salt, 5,7-Dinitro-8-hydroxy-2-naphthalenesulfonic acid sodium salt, Acid Yellow 1, Flavianic acid sodium salt

  • CAS Number 846-70-8

  • Empirical Formula (Hill Notation) C10H4N2Na2O8S

  • Molecular Weight 358.19

  •  Beilstein Registry Number 3839220

  •  Colour Index Number 10316

  •  EC Number 212-690-2

  •  MDL number MFCD00003958

  •  PubChem Substance ID 329762555

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Properties

Related Categories Analytical Reagents, Analytical/Chromatography, Cell Biology, Hematology and Histology, Microscopy Reagents,
grade   for microscopy (Hist.)
  for the precipitation (of amino acids and peptides)
InChI Key   CTIQLGJVGNGFEW-UHFFFAOYSA-L

Description

Analysis Note

λmax. ∼428 nm/∼392 nm; E(1%,1 cm) ∼275-425/∼250-400 (H2O)

Application

Naphthol yellow S has been used as a staining agent in fixed human embryonic stem cell-derived cardiomyocytes.

Biochem/physiol Actions

Naphthol yellow S (NYS) is used as a stain for protein basic groups. It is an acidic dye and forms a NYS-protein complex at acidic pH. Combination of feulgen and NYS provides DNA to protein ratio.

Price and Availability


Tissue Diagnostics

All labs need water

Biomedical Applications
Safety & Documentation

Safety Information

Symbol 
Signal word 
Warning
Hazard statements 
Precautionary statements 
RIDADR 
NONH for all modes of transport
WGK Germany 
3
RTECS 
QK1813000
Protocols & Articles
Peer-Reviewed Papers
15

References

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