Sudan II | CAS No. 3118-97-6

Sudan II

Basic Information

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CAS Number

3118-97-6

Molecular Formula

C18H16N2O

Molecular Weight

276.33 g/mol

Basic Physical Properties

Melting Point

158.0 to 161.0 deg-C

Boiling Point

419.24°C (rough estimate)

Flash Point

213.6 °C

Solubility

Insoluble in water; sol in ethanol, acetone and benzene

Refractive Index

1.5800 (estimate)

SMILES

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Cc1ccc(c(c1)C)N/N=C\1/C(=O)C=Cc2c1cccc2

InChI

InChI=1S/C18H16N2O/c1-12-7-9-16(13(2)11-12)19-20-18-15-6-4-3-5-14(15)8-10-17(18)21/h3-11,19H,1-2H3/b20-18+

InChIKey

YPXOPAFVVHXQDP-CZIZESTLSA-N

LogP

3.7155400000000016

Topological Polar Surface Area

41.46 Å²

Hydrogen Bond Donor/Acceptor

1 / 3

Complexity

454

Safety Information

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GHS Hazard Pictograms

H315

H319

H335

Hazard Statement

H315 Causes skin irritation
Skin corrosion/irritation

H319 Causes serious eye irritation
Serious eye damage/eye irritation

H335 May cause respiratory irritation
Specific target organ toxicity, single exposure; Respiratory tract irritation

Synonyms & References

English

Sudan II
1-(2,4-Dimethylphenylazo)-2-naphthol
C.I. 12140
Solvent Orange 7
sudan ii (C.I. 12140)
1-(2,4-XYLIDYLAZO)-2-NAPHTHOL
1-[2,4-XYLYLAZO]-2-NAPHTHOL
FAT PONCEAU
CI 12140
CI NO 12140
CALCO OIL SCARLET BL
CALCO OIL SCARLET ZBL
Sudan?Ⅱ
SUDAN II, FOR MICROSCOPICAL STAINING (C.I. 12140)
SudanII,pure25GR
1-(2',4'-dimethylbenzeneazo)-2-naphthol
1-(2,4-Dimethyl-phenylazo)-[2]naphthol
1-(2,4-Xylylazo)-2-naphthol,Solvent Orange 7
1-[(2,4-dimethylphenyl)azo]-2-naphthalenol
2,4-dimethyl-1-phenylazo-2-naphthol
AKA505
Biological stain
FAT RED
m-Xylol-(4 azo 1)-naphthol-(2)
Red B
redno.5
Rot B
SUDAN
SUDAN 2
Sudan II, pure
Oil Red XO

MDL Number

MFCD00003896

Customs Code

2927000090

FAQ

What is Sudan II (CAS: 3118-97-6)?

Sudan II, with the CAS number 3118-97-6, is a synthetic triarylmethane dye known for its red color. It has the chemical formula C20H16N2O2S2 and is commonly used as a coloring agent. Sudan II is soluble in organic solvents and exhibits good stability under normal conditions. Its structure includes three aromatic rings connected via a methine bridge, contributing to its vibrant hue and chemical properties.

What are the main uses of Sudan II (CAS: 3118-97-6)?

Sudan II (CAS: 3118-97-6) is primarily used as a food dye, though its application is restricted in many regions due to safety concerns. It has also been historically employed in industrial settings for coloring oils, fats, and textiles. In research, it serves as a fluorescent marker for detecting certain compounds. However, its use in pharmaceuticals is limited due to regulatory restrictions and potential health risks.

Is Sudan II (CAS: 3118-97-6) safe?

Sudan II (CAS: 3118-97-6) is not considered safe for human consumption and has been classified as a potential carcinogen. Exposure to high concentrations may lead to health risks, including toxicity. Safety standards emphasize avoiding ingestion, inhalation, or skin contact. Protective measures such as gloves, ventilation, and proper handling are recommended to ensure safe use in non-food applications.

How should Sudan II (CAS: 3118-97-6) be stored?

Sudan II (CAS: 3118-97-6) should be stored in a cool, dry place, away from light and moisture. It is best kept in tightly sealed, airtight containers to maintain stability. Storage conditions should avoid high temperatures and prolonged exposure to air, as these can degrade the compound. Always follow safety guidelines to prevent contamination or accidental exposure.