OIL YELLOW OB

Product NameOIL YELLOW OB
CAS131-79-3
MFC17H15N3
MW261.32
EINECS205-039-9
MOL File131-79-3.mol

Chemical Properties

Melting point	125-126° (Fischer)
Boiling point	394.58°C (rough estimate)
Density	1.1394 (rough estimate)
refractive index	1.6360 (estimate)
IARC	3 (Vol. 8, Sup 7) 1987
EPA Substance Registry System	C.I. Solvent Yellow 6 (131-79-3)

Safety Information

Hazardous Substances Data	131-79-3(Hazardous Substances Data)
Toxicity	LD50 oral in rat: 120mg/kg

Usage And Synthesis

Chemical Properties

Orange or yellow powder. Insoluble in water; soluble in alcohol and oils.

Uses

Biological stain.

Definition

ChEBI: Yellow OB is a member of azobenzenes.

Preparation

O-Methylaniline diazotization, and Naphthalen-2-amine coupling.

Hazard

Consult regulations before using in food products. Questionable carcinogen.

Safety Profile

A poison by ingestion. Moderately toxic by intraperitoneal and subcutaneous routes. Questionable carcinogen with experimental tumorigenic data. May be contaminated with the carcinogen p-naphthylamine. Mutation data reported. When heated to decomposition it emits toxic fumes of NOx. See also AROMATIC AMINES.

Properties and Applications

red light yellow to orange (in mineral oil). Soluble in ethanol and Toluene, insoluble in water. In the crystallization of from ethanol to get is a deep red, melting point is 126 ℃. In concentrated sulfuric acid to red light purple, after diluted solution for red, orange brown precipitation. Dye alcohol solution to join hydrochloric acid solution more red; Sodium hydroxide and the same color.