587-98-4

Basic information

• Product Name: METANIL YELLOW
• Synonyms: 3-((4-(phenylamino)phenyl)azo)-benzenesulfonicacimonosodiumsalt;3-[[4-(phenylamino)phenyl]azo]-benzenesulfonicacimonosodiumsalt;abcolmetanilyellow;AcidgoldenyellowG;acidicmetanilyellow;acidleatheryellowprw;acidleatheryellowr;acidmetanilyellow
• CAS NO: 587-98-4
• Molecular Formula: C₁₈H₁₄N₃O₃S*Na
• Molecular Weight: 375.38
• EINECS: 209-608-2
• Product Categories: Organics;Analytical Chemistry;Indicator (pH);pH Indicators;Azo
• Mol File: 587-98-4.mol
• Article Data: 0

Chemical Properties

• Melting Point: >250°C
• Boiling Point: 325℃[at 101 325 Pa]
• Appearance: Orange/Powder
• Density: 0.488[at 20℃]
• Vapor Pressure: 0Pa at 25℃
• Storage Temp.: Storage temperature: no restrictions.
• Solubility: 25g/l
• Water Solubility: Soluble in water (25g/L).
• Merck: 14,5928
• BRN: 3831568
• CAS DataBase Reference: METANIL YELLOW(CAS DataBase Reference)
• NIST Chemistry Reference: METANIL YELLOW(587-98-4)
• EPA Substance Registry System: METANIL YELLOW(587-98-4)

Safety Data

• Hazard Codes: Xi
• Statements: 43-36/37/38
• Safety Statements: 22-24/25-36/37-36-26
• WGK Germany: 2
• RTECS: DB7329500
• TSCA: Yes
• Hazardous Substances Data: 587-98-4(Hazardous Substances Data)

Usage

Description

Metanil yellow is a yellow monoazo dye. This coloring agent is used in leather and wood stains, and was also employed as a food dye in India.

Chemical Properties

orange powder

Uses

Different sources of media describe the Uses of 587-98-4 differently. You can refer to the following data:
1. As indicator in 0.1% solution, of which 2 drops are required for 10 ml liquid. pH: 1.2 red to 2.3 yellow.
2. Metanil Yellow is used as indicator. Metanil yellow is useful in spectrophotometric methods to determine the presence of trace amounts of nitrates and nitrites in solution. The method utilizes the fact that potassium bromate can catalyze the discoloring of Metanil yellow which can then be analyzed by spectrophotometry.
3. dye used in leather; as indicator (pH) in laboratories

Definition

ChEBI: An organic sodium salt having 3-[(4-anilinophenyl)diazenyl]benzene-1-sulfonate as the counterion. Used in one variant of Masson's trichrome to stain collagen yellow in contrast to the red muscle, but is not in common used.

General Description

Metanil yellow is an azo dye, which is used as a counterstain in PAS (periodic acid-Schiff) or iron-hematoxylin stained sections to increase contrast. At pH 1.2, metanil yellow is red in color, whereas in pH 2.3, it is yellow in color.

Flammability and Explosibility

Notclassified

Biochem/physiol Actions

Metanil yellow is an azo dye. It is used as a counterstain in PAS (periodic acid-Schiff)/iron-hematoxylin stained sections to increase contrast. Metanil yellow changes its color from red at pH 1.2 to yellow at pH 2.3.

Contact allergens

Metanil yellow is a yellow monoazoic dye. This color ing agent is used in leather and wood stains, and is also employed as a food dye in India.

Safety Profile

Moderately toxic by intraperitoneal route. Experimental reproductive effects. Human mutation data reported. When heated to decomposition it emits toxic fumes of SOx, NOx, and NazO. See also AROMATIC AMINES and SULFONATES.

Properties and Applications

Standard Light Fastness Soaping Persperation Fastness Oxygen bleaching Fastness to seawater Fading Stain Fading Stain Fading Stain ISO 3 2 2-3 AATCC 3 1 4 5 1

Standard

Light Fastness

Fading

Stain

ISO

3

AATCC

3

Purification Methods

It can be salted out from water three times with sodium acetate, then repeatedly extracted with EtOH [McGrew & Schneider J Am Chem Soc 72 2547 1950]. [Beilstein 16 II 168.]

InChI:InChI=1/C18H15N3O3S.Na/c22-23-24-25-18-8-4-7-17(13-18)21-20-16-11-9-15(10-12-16)19-14-5-2-1-3-6-14;/h1-13,19,22H;/q;+1/p-1/rC18H14N3NaO3S/c22-23-24-25-26-18-8-4-7-17(13-18)21-20-16-11-9-15(10-12-16)19-14-5-2-1-3-6-14/h1-13,19H

Downstream Products

• 101-54-2 N-phenylphenylene-1,4-diamine