SUDAN II
- CAS No.
- 3118-97-6
- Chemical Name:
- SUDAN II
- Synonyms
- SUDAN;SUDAN ORANGE;SUDAN 2;CI 12140;Oil Scarlet;Sudan Red II;SOLVENT ORANGE 7;1-(2,4-DIMETHYLPHENYLAZO)-2-NAPHTHOL;1-[(2,4-dimethylphenyl)azo]-2-Naphthalenol;redb
- CBNumber:
- CB0451952
- Molecular Formula:
- C18H16N2O
- Molecular Weight:
- 276.33
- MDL Number:
- MFCD00003896
- MOL File:
- 3118-97-6.mol
- MSDS File:
- SDS
- TDS File:
- TDS
| 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 |
| Major Application |
diagnostic assay manufacturing hematology histology |
| 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/h3-11,21H,1-2H3/b20-19+ |
| InChIKey | JBTHDAVBDKKSRW-FMQUCBEESA-N |
| SMILES | Cc1ccc(\N=N\c2c(O)ccc3ccccc23)c(C)c1 |
| LogP | 6.6 |
| CAS DataBase Reference | 3118-97-6 |
| EWG's Food Scores | 2-5 |
| FDA UNII | 8C1M5O3ECT |
| IARC | 3 (Vol. 8, Sup 7) 1987 |
| EPA Substance Registry System | C.I. Solvent Orange 7 (3118-97-6) |
| UNSPSC Code | 85151701 |
| NACRES | NA.47 |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |   GHS07,GHS08 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Warning | |||||||||
| Hazard statements | H315-H319-H335-H351 | |||||||||
| Precautionary statements | P201-P261-P280-P305+P351+P338-P405-P501a | |||||||||
| PPE | dust mask type N95 (US), Eyeshields, Gloves | |||||||||
| Hazard Codes | Xi | |||||||||
| Risk Statements | 36/37/38 | |||||||||
| Safety Statements | 26-37/39-24/25 | |||||||||
| WGK Germany | 3 | |||||||||
| RTECS | QL5850000 | |||||||||
| TSCA | TSCA listed | |||||||||
| HS Code | 32129000 | |||||||||
| Storage Class | 11 - Combustible Solids | |||||||||
| Hazard Classifications | Eye Irrit. 2 Skin Irrit. 2 Skin Sens. 1 |
|||||||||
| Hazardous Substances Data | 3118-97-6(Hazardous Substances Data) | |||||||||
| REACH Registrations | Inactive | |||||||||
| NFPA 704 |
|
SUDAN II price More Price(26)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich | 74033 | Sudan II certified reference material, TraceCERT®, Manufactured by: Sigma-Aldrich Production GmbH, Switzerland | 3118-97-6 | 50 mg | $119 | 2026-04-30 | Buy |
| Sigma-Aldrich | 199656 | Sudan II Dye content 90% | 3118-97-6 | 25g | $539 | 2026-04-30 | Buy |
| Sigma-Aldrich | 07937 | Sudan II analytical standard | 3118-97-6 | 25mg | $185 | 2026-04-30 | Buy |
| TCI Chemical | O0101 | Sudan II [=1-(2,4-Xylidylazo)-2-naphthol] >93.0%(E) | 3118-97-6 | 25g | $24 | 2026-04-30 | Buy |
| Usbiological | 289533 | Solvent Orange 7 (Sudan II) Asreported | 3118-97-6 | 100g | $220 | 2026-06-03 | Buy |
SUDAN II Chemical Properties,Uses,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.
Preparation
mixed N,N-dimethylaniline diazotization, and Naphthalen-2-ol coupling.
Definition
ChEBI: Sudan II is a member of azobenzenes.
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
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| J & K SCIENTIFIC LTD. | 18210857532 18210857532 | jkinfo@jkchemical.com | China | 96815 | 76 |
| Meryer (Shanghai) Chemical Technology Co., Ltd. | 4006356688 18621169109 | market03@meryer.com | China | 40202 | 62 |
| 3B Pharmachem (Wuhan) International Co.,Ltd. | 18930552037 | 3bsc@sina.com | China | 15813 | 69 |
| Alfa Aesar | 400-6106006 | saleschina@alfa-asia.com | China | 30103 | 84 |
| TCI (Shanghai) Development Co., Ltd. | 021-67121386 | Sales-CN@TCIchemicals.com | China | 24512 | 81 |
| Energy Chemical | 400-0056266 | sales8178@energy-chemical.com | China | 44850 | 61 |
| Shandong Xiya Chemical Co., Ltd | 13355009207 13355009207 | 3007715519@qq.com | China | 18722 | 57 |
| Tangshan Moneide Trading Co., Ltd. | 0315-8309571 15633399667 | sales@moneidechem.com | China | 703 | 57 |
| Tianjin heowns Biochemical Technology Co., Ltd. | 400 638 7771 | sales@heowns.com | China | 14412 | 57 |
| Sinopharm Chemical Reagent Co,Ltd. | 86-21-63210123 | sj_scrc@sinopharm.com | China | 9791 | 79 |
View Lastest Price from SUDAN II manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2026-05-11 | Sudan II
3118-97-6
|
$56.00-113.00 | 98.45% | 10g | TargetMol Chemicals Inc. | ||
 |
2024-08-11 | SUDAN II
3118-97-6
|
$1.00 | 1KG | 99% | 20T | Shaanxi Dideu Medichem Co. Ltd | |
 |
2023-02-24 | Sudan II
3118-97-6
|
5mg | ≥90%(HPLC) | 10 g | Shanghai Standard Technology Co., Ltd. |
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