NAPHTHOL YELLOW S Chemical Properties

Melting point:

>300℃

Colour Index 

10316

form 

neat

Merck 

14,6393

BRN 

2708476

Stability:

Stable. Incompatible with strong oxidizing agents.

EPA Substance Registry System

C.I. Acid Yellow 1 (846-70-8)

Safety Information

Hazard Codes 

Xi,C,F

Risk Statements 

11-34

Safety Statements 

22-24/25-45-36/37/39-26-16

WGK Germany 

3

RTECS 

QK1813000

Hazard Note 

Irritant

TSCA 

Yes

HS Code 

32129000

MSDS

• Language:EnglishProvider:SigmaAldrich
• Language:EnglishProvider:ALFA

NAPHTHOL YELLOW S Usage And Synthesis

Chemical Properties

light yellow powder

Uses

Dye for wool, silk.

Definition

ChEBI: An organic sodium salt that is the disodium salt of 5,7-dinitro-8-hydroxynaphthalene-2-sulfonic acid.

Purification Methods

It is a water-soluble greenish yellow powder. The free sulfonic acid can be recrystallised from dilute HCl (m 150o) or AcOH/EtOAc (m 148-149.5o). The disodium salt is then obtained by dissolving the acid in two equivalents of aqueous NaOH and evaporating to dryness and drying the residue in a vacuum desiccator. The sodium salt can be recrystallised from the minimum volume of H2O or from EtOH [Dermer & Dermer J Am Chem Soc 61 3302 1939]. [Beilstein 11 III 542.]

NAPHTHOL YELLOW S(846-70-8)Related Product Information

• 2-Nitrophenol
• 4-Nitro-1-naphthol
• Sodium 2,4-dinitrophenate
• NAPHTHOL YELLOW
• 2-AMINO-4-NITROPHENOL SODIUM SALT
• 4-NITROSOPHENOL SODIUM SALT 12 WT. %
• 2-NITRONAPHTHALENE
• 4-amino-1-naphthol
• 1,3-Dinitrobenzene
• 2-Chloro-5-hydroxypyridine
• 3-Nitroaniline
• FLAVIANIC ACID
• 1-Aminonaphthalene-6-sulfonic acid
• 2-Amino-4-nitrophenol
• NAPHTHOL YELLOW S
• N-hydroxy-1-naphthylamine
• 2,4-DINITRO-1-NAPHTHOL,SODIUMSALT
• 2-Nitro-1-naphthol