Skip to Content
Merck
All Photos(1)

Documents

70540

Sigma-Aldrich

Naphthol Yellow S

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

Synonym(s):

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

Sign Into View Organizational & Contract Pricing


About This Item

Empirical Formula (Hill Notation):
C10H4N2Na2O8S
CAS Number:
Molecular Weight:
358.19
Colour Index Number:
10316
Beilstein:
3839220
EC Number:
MDL number:
UNSPSC Code:
12171500
PubChem Substance ID:
NACRES:
NA.47

grade

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

Quality Level

form

powder

solubility

methanol: water (1:1): 0.5 g/10 mL, clear

εmax

≥275 at 423-433 nm in water
≥≥ 250 at 387-397 nm in water

application(s)

diagnostic assay manufacturing
hematology
histology

storage temp.

room temp

SMILES string

[Na+].[Na+].[O-]c1c(cc([N+]([O-])=O)c2ccc(cc12)S([O-])(=O)=O)[N+]([O-])=O

InChI

1S/C10H6N2O8S.2Na/c13-10-7-3-5(21(18,19)20)1-2-6(7)8(11(14)15)4-9(10)12(16)17;;/h1-4,13H,(H,18,19,20);;/q;2*+1/p-2

InChI key

CTIQLGJVGNGFEW-UHFFFAOYSA-L

Looking for similar products? Visit Product Comparison Guide

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.

Analysis Note

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

Pictograms

Health hazardExclamation mark

Signal Word

Warning

Hazard Statements

Hazard Classifications

Skin Sens. 1 - STOT RE 2

Storage Class Code

11 - Combustible Solids

WGK

WGK 2

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

Scholtissek C, et al.
Chemistry and Cytochemistry of Nucleic Acids and Nuclear Proteins (2012)
J Gaub
The Histochemical journal, 13(5), 717-722 (1981-09-01)
Owing to the accumulation of nuclear non-histone protein (NHP) (a) in cells entering the cell cycle from the quiescent state and (b) in continuously cycling cells during G1 phase, a simultaneous determination of DNA and nuclear NHP is of high
S Gutschmidt et al.
Histochemistry, 72(3), 467-479 (1981-01-01)
In order to quantify the amount of protein in the small intestinal brush border region at different villus sites, cryostat sections of adult rat jejunum were stained with Naphthol Yellow S, Dinitrofluorobenzene and Coomassie Brilliant Blue and the dye deposits
P Skehan et al.
In vitro cellular & developmental biology : journal of the Tissue Culture Association, 21(5), 288-290 (1985-05-01)
A rapid method has been developed for measuring the cellular protein content of mono- and multilayered anchorage cultures. Fixed or air dried cultures are stained for 30 min with 0.2% Naphthol Yellow S (NYS) dissolved in 1% acetic acid. Unbound
F A Bignone et al.
Bollettino della Societa italiana di biologia sperimentale, 57(9), 950-955 (1981-05-15)
In the present work we studied the reversibility of the binding reaction of Naphthol Yellow S to proteins using a Testing Automatic System Leitz. We presently think that the NY-S staining procedure, can be used as a reliable quantitative method

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service