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NAPHTHOL YELLOW S

Basic information Safety Supplier Related

NAPHTHOL YELLOW S Basic information

Product Name:
NAPHTHOL YELLOW S
Synonyms:
  • 5,7-DINITRO-8-HYDROXY-2-NAPHTHALENESULFONIC ACID SODIUM SALT
  • ACID YELLOW S
  • ACID YELLOW 1
  • AMACID YELLOW S
  • 8-HYDROXY-5,7-DINITRO-2-NAPHTHALENESULFONIC ACID DISODIUM SALT
  • FD&CYELLOWNO1
  • EXTD&CYELLOWNO.7
  • DISODIUM 5,7-DINITRO-8-OXINDONAPHTHALENE ( ACID YE
CAS:
846-70-8
MF:
C10H4N2Na2O8S
MW:
358.19
EINECS:
212-690-2
Mol File:
846-70-8.mol
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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)
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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

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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 SSupplier

J & K SCIENTIFIC LTD.
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010-82848833- ;010-82848833-
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jkinfo@jkchemical.com;market6@jkchemical.com
Alfa Aesar
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400-610-6006; 021-67582000
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saleschina@alfa-asia.com
TCI (Shanghai) Development Co., Ltd.
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021-67121386 / 800-988-0390
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Sales-CN@TCIchemicals.com
Energy Chemical
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021-58432009
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sales8178@energy-chemical.com
Shanghai Longsheng chemical Co.,Ltd.
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021-58099652-8005;021-58099637-8009
Email
bin.wu@shlschem.com;sales@shlschem.com