ChemicalBook Product Catalog Dyes and Pigments Pigment Organic pigments 1-(1-naphthylazo)-2-naphthol

1-(1-naphthylazo)-2-naphthol

1-(1-naphthylazo)-2-naphthol Basic information
Product Name:1-(1-naphthylazo)-2-naphthol
Synonyms:1-(1-naphthylazo)-2-naphthol;Red 2R;2-Naphthalenol, 1-(1-naphthalenylazo)-;Solvent red 4 (C.I. 12170);C.I. Solvent Red 4;C. I. Pigment Red 40;1-(1-Naphtylazo)-2-naphthol;1-(1-Naphtylazo)naphthalene-2-ol
CAS:2653-64-7
MF:C20H14N2O
MW:298.34
EINECS:220-176-4
Product Categories:Organics
Mol File:2653-64-7.mol
1-(1-naphthylazo)-2-naphthol Structure
1-(1-naphthylazo)-2-naphthol Chemical Properties
Melting point 230 °C
Boiling point 530.2±33.0 °C(Predicted)
density 1.20±0.1 g/cm3(Predicted)
pka12.03±0.50(Predicted)
form powder to crystal
color Orange to Brown to Dark purple
CAS DataBase Reference2653-64-7
EPA Substance Registry System2-Naphthalenol, 1-(1-naphthalenylazo)- (2653-64-7)
Safety Information
HS Code 2927.00.5000
MSDS Information
1-(1-naphthylazo)-2-naphthol Usage And Synthesis
PreparationNaphthalen-1-amine diazotization and Naphthalen-2-ol coupling.
Properties and Applicationsyellow red. From toluene in the crystallization product melting point 224 ℃. Soluble in hot ethanol and benzene in red. In concentrated sulfuric acid to red light blue, dilution to red light purple solution, and then have red brown precipitation. Dye ethanol solution to join concentrated hydrochloric acid is dark red; Join concentrated sodium hydroxide solution for bright red light brown. Mainly used in oil, fat and wax, soap coloring.
Standard Light Fastness Heat-resistant(℃) water Sodium Carbonate(5%) Hydrochloric acid(5%)
Melting point Stable
ISO General 220 150≥ 220

Sublimation

Insoluble No change No change
1-(1-naphthylazo)-2-naphthol Preparation Products And Raw materials
4-(2-PYRIDYLAZO)RESORCINOL
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