587-98-4

Name	METANIL YELLOW
CAS	587-98-4
EINECS(EC#)	209-608-2
Molecular Formula	C18H14N3NaO3S
MDL Number	MFCD00007486
Molecular Weight	375.38
MOL File	587-98-4.mol

Chemical Properties

Appearance	orange powder
Melting point	>250°C
Boiling point	325℃[at 101 325 Pa]
density	0.488[at 20℃]
vapor pressure	0Pa at 25℃
storage temp.	Storage temperature: no restrictions.
solubility	25g/l
Colour Index	13065
form	Powder
color	Orange
PH	10 (10g/l, H2O, 20℃)
PH Range	Red (1.2) to yellow (2.3)
Water Solubility	Soluble in water (25g/L).
λmax	414nm, 435nm
Merck	14,5928
BRN	3831568
Major Application	Display device, nanoparticles, optical sensors, batteries, lithographic printing plates, inks, highlighters, children’s coloring books, floor coatings, disinfectants, dyes, personal care products, cosmetics, food storage, antiseptic, dental impressionmaterials
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. less more
LogP	0.137 at 25℃
CAS DataBase Reference	587-98-4(CAS DataBase Reference)
EPA Substance Registry System	C.I. Acid Yellow 36, monosodium salt (587-98-4)

Safety Data

Hazard Codes	Xi
Risk Statements	R43:May cause sensitization by skin contact. R36/37/38:Irritating to eyes, respiratory system and skin . less more
Safety Statements	S22:Do not breathe dust . S24/25:Avoid contact with skin and eyes . S36/37:Wear suitable protective clothing and gloves . S36:Wear suitable protective clothing . S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice . less more
WGK Germany	2
RTECS	DB7329500
TSCA	Yes
HS Code	32041200
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. less more
Toxicity	LD50 orally in Rabbit: > 2000 mg/kg LD50 dermal Rat > 2000 mg/kg less more

Raw materials And Preparation Products

Hazard Information

Chemical Properties

orange powder

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.

Uses

As indicator in 0.1% solution, of which 2 drops are required for 10 ml liquid. pH: 1.2 red to 2.3 yellow.

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.

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.

Properties and Applications

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

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.]

Spectrum Detail

Well-known Reagent Company Product Information

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