ChemicalBook > CAS DataBase List > SUDAN II

SUDAN II

Product Name: SUDAN II
CAS No.: 3118-97-6
Chemical Name: SUDAN II
Synonyms: SUDAN;SUDAN ORANGE;SUDAN 2;CI 12140;1-[(2,4-dimethylphenyl)azo]-2-Naphthalenol;redb;rotb;Red B;Rot B;AKA505
CBNumber: CB0451952
Molecular Formula: C18H16N2O
Formula Weight: 276.33
MOL File: 3118-97-6.mol

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SUDAN II Property

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)
Flash point:: 231.6°
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℃
λmax: 493 nm
604 nm (2nd)
ε(extinction coefficient): ≥14000 at 491-497nm in methanol at 0.005g/L
≥9000 at 419-425nm in methanol at 0.005g/L
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)

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Safety

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)

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Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

H351Suspected of causing cancer

Precautionary statements

P201Obtain special instructions before use.

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P405Store locked up.

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N-Bromosuccinimide Price

Sigma-Aldrich

Product number: 74033
Product name: Sudan II
Purity: certified reference material, TraceCERT®, Manufactured by: Sigma-Aldrich Production GmbH, Switzerland
Packaging: 50 mg
Price: $109
Updated: 2025/07/31

Sigma-Aldrich

Product number: 199656
Product name: Sudan II
Purity: Dye content 90%
Packaging: 25g
Price: $53
Updated: 2025/07/31

Sigma-Aldrich

Product number: 07937
Product name: Sudan II
Purity: analytical standard
Packaging: 25mg
Price: $172
Updated: 2025/07/31

TCI Chemical

Product number: O0101
Product name: Sudan II [=1-(2,4-Xylidylazo)-2-naphthol]
Purity: >93.0%(E)
Packaging: 25g
Price: $28
Updated: 2025/07/31

TRC

Product number: S688890
Product name: Sudan II
Packaging: 1g
Price: $65
Updated: 2021/12/16

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SUDAN II Chemical Properties,Usage,Production

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

Biological Activity

Sudan II is a fat-soluble synthetic colorant and it belongs to the group of azo compounds. It is classified by the international agency for research on cancer (IARC) as category 3 carcinogens because it has an ability to cause certain forms of liver and bladder cancer in animals.

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 Preparation Products And Raw materials

Raw materials

Preparation Products

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View Lastest Price from SUDAN II manufacturers

Shaanxi Dideu Medichem Co. Ltd

Product: SUDAN II 3118-97-6
Price: US $1.00/KG
Min. Order: 1KG
Purity: 99%
Supply Ability: 20T
Release date: 2024-08-11

Shanghai Standard Technology Co., Ltd.

Product: Sudan II 3118-97-6
Price: US $0.00/mg
Min. Order: 5mg
Purity: ≥90%(HPLC)
Supply Ability: 10 g
Release date: 2019-12-30

Career Henan Chemical Co

Product: SUDAN II 3118-97-6
Price: US $8.00/kg
Min. Order: 1kg
Purity: 99%
Supply Ability: 10MT
Release date: 2018-12-16

3118-97-6, SUDAN IIRelated Search:

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