Solvent Yellow 56

CAS NO.：2481-94-9
Empirical Formula: C16H19N3
Molecular Weight: 253.34
MDL number: MFCD00009043
EINECS: 219-616-8
SAFETY DATA SHEET (SDS)
Update Date: 2025-11-07 14:45:54

What is Solvent Yellow 56?

Chemical properties

Solvent Yellow 56 is a Light brown powder, its structure is similar to Solvent Yellow 124, which used as a fuel dye in European Union, and to Aniline Yellow.

The Uses of Solvent Yellow 56

4-(Diethylamino)azobenzene (cas# 2481-94-9) is a useful research chemical. Dyes and metabolites, Environmental Testing.Is used in dyeing method of polyolefin fiber or fabric using organic solvent and solvent dye.

Definition

ChEBI: An azobenzene that is N,N-diethylaniline substituted at position 4 by a phenylazo group.

Preparation

aniline diazotization, and N,N-diethylbenzenamine coupling.

Flammability and Explosibility

Not classified

Safety Profile

Mutation data reported. Whenheated to decomposition it emits toxic fumes of NOx.

Properties and Applications

red light yellow. Deep red powder. Insoluble in water, soluble in a variety of solvent. Used for oil, wax, fat class material coloring. Also can be used for plastic, printing ink, paint, etc coloring, and can also be used to smoke dye.

Standard	Light Fastness	Heat-resistant(℃)		water	Sodium Carbonate(5%)	Hydrochloric acid(5%)
		Melting point	Stable
ISO				Insoluble	Insoluble	Insoluble

Properties of Solvent Yellow 56

Melting point:	94-96°C
Boiling point:	386.54°C (rough estimate)
Density	1.0901 (rough estimate)
vapor pressure	0Pa at 25℃
refractive index	1.6470 (estimate)
storage temp.	-20°C
solubility	Chloroform (Sparingly), DMSO (Slightly, Sonicated)
form	A solid
pka	3.41±0.50(Predicted)
Colour Index	11021
color	Dark Orange to Very Dark Orange
Water Solubility	264μg/L at 25℃
CAS DataBase Reference	2481-94-9(CAS DataBase Reference)
EPA Substance Registry System	C.I. Solvent Yellow 56 (2481-94-9)

Safety information for Solvent Yellow 56

Signal word	Warning
Pictogram(s)	Exclamation Mark Irritant GHS07 Health Hazard GHS08
GHS Hazard Statements	H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H341:Germ cell mutagenicity
Precautionary Statement Codes	P201:Obtain special instructions before use. P202:Do not handle until all safety precautions have been read and understood. P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P280:Wear protective gloves/protective clothing/eye protection/face protection. P308+P313:IF exposed or concerned: Get medical advice/attention. P405:Store locked up.