SUDAN II Chemical Properties

Melting point:

156-158 °C(lit.)

Boiling point:

419.24°C (rough estimate)

Density 

1.1318 (rough estimate)

vapor pressure 

0Pa at 25℃

refractive index 

1.5800 (estimate)

storage temp. 

Hygroscopic, Refrigerator, Under inert atmosphere

solubility 

Chloroform (Slightly), DMSO (Slightly, Heated, Sonicated), Ethyl Acetate (Slight

pka

13.52±0.50(Predicted)

Colour Index 

12140

form 

Powder

color 

Red to orange-brownish

Water Solubility 

54.45μg/L at 25℃

Stability:

Hygroscopic

LogP

6.6

CAS DataBase Reference

3118-97-6

IARC

3 (Vol. 8, Sup 7) 1987

EPA Substance Registry System

C.I. Solvent Orange 7 (3118-97-6)

Safety Information

Hazard Codes 

Xi

Risk Statements 

36/37/38

Safety Statements 

26-37/39-24/25

WGK Germany 

3

RTECS 

QL5850000

TSCA 

Yes

HS Code 

32129000

Hazardous Substances Data

3118-97-6(Hazardous Substances Data)

MSDS

• Language:English Provider:SigmaAldrich
• Language:English Provider:ACROS
• Language:English Provider:ALFA

SUDAN II Usage And Synthesis

Chemical Properties

Red to orange-brownish powder

Uses

Sudan II is a fat soluble red synthetic azo dye. Sudan II is reduced to potentially carcinogenic aromatic amines by human intestinal bacteria. Dyes and metabolites, Environmental Testing.

Definition

ChEBI: Sudan II is a member of azobenzenes.

Preparation

mixed N,N-dimethylaniline diazotization, and Naphthalen-2-ol coupling.

General Description

Red crystals. Insoluble in water.

Air & Water Reactions

Azo dyes can be explosive when suspended in air at specific concentrations. Insoluble in water.

Reactivity Profile

SUDAN II is an azo compound. Toxic gases are formed by mixing azo compounds with acids, aldehydes, amides, carbamates, cyanides, inorganic fluorides, halogenated organics, isocyanates, ketones, metals, nitrides, peroxides, phenols, epoxides, acyl halides, and strong oxidizing or reducing agents. Flammable gases are formed by mixing materials in this group with alkali metals. Explosive combination can occur with strong oxidizing agents, metal salts, peroxides, and sulfides.

Flammability and Explosibility

Not classified

Safety Profile

Questionable carcinogen with experimental carcinogenic data. Mutation data reported. When heated to decomposition it emits toxic fumes of NOx.

Properties and Applications

red orange. Melting point 166 ℃ (from the glacial acetic acid crystallization out). Soluble in ethanol, acetone and benzene as the red orange. In concentrated sulfuric acid for cherry red, dilution still for cherry red, and then into the orange and red brown with precipitation; In concentrated nitric acid for brilliant orange solution, and then gradually become dark; In 10% of sodium hydroxide solution insoluble, for yellow sanguine. Dye alcohol solution to join concentrated hydrochloric acid for orange solution; Add sodium hydroxide to become red.

Standard	Light Fastness	Heat-resistant(℃)		water	Sodium Carbonate(5%)	Hydrochloric acid(5%)
		Melting point	Stable
ISO	Good	166	100	Insoluble	Well	Well

SUDAN II(3118-97-6)Related Product Information

• ACRIFLAVINE
• Bromocresol Purple
• Acid Black 1
• Solvent Black 3
• Solvent Red 24
• Solvent Red 23
• Hematoxylin
• Sudan Red 7B
• Potassium sorbate
• Sudan I
• ACID RED 26
• SUDAN II
• DIRECT FAST RED 3B
• ACID RED 114
• PONCEAU 3R
• 4,4'-[1,3,4-OXADIAZOLE-2,5-DIYL]-BIS[(2-METHYL-4,1-PHENYLENE)AZO] BIS[3-HYDROXY]-N-PHENYL-2-NAPHTHALENECARBOXAMIDE
• ACID RED 89
• dichlotran K