Molekula
Sudan II (C.I.12140)
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Sudan II (C.I. 12140) is a bright red azo dye primarily used in analytical chemistry for staining fats, oils, and waxes, as well as a colorant in solvents and plastics. It is also employed in microscopy and forensic analysis for its vivid coloration properties. This chemical has a CAS number of 3118-97-6, a molecular formula of C18H16N2O, and a molecular weight of 276.33. It is stored at ambient conditions, with a signal word of "Warning" indicating moderate hazard. Molekula supplies Sudan II from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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5 g — £28.00 per pack ex VAT · £33.60 inc. VAT
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100 g — £58.80 per pack ex VAT · £70.56 inc. VAT
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | Solid |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Flash Point | 213 °C |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 46987017 |
| CAS Number | 3118-97-6 |
| IUPAC Name | 1-[(2,4-dimethylphenyl)diazenyl]naphthalen-2-ol |
| EC Number | 221-490-4 |
| Molecular Formula | C18H16N2O |
| Molecular Weight | 276.33 |
| Exact Mass | 276.1263 |
| SMILES | CC1=CC(=C(C=C1)N=NC2=C(C=CC3=CC=CC=C32)O)C |
| InChIKey | JBTHDAVBDKKSRW-UHFFFAOYSA-N |
| 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/h3-11,21H,1-2H3 |
| PubChem CID | 18386 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 3212.90.00 |
| Tariff Code | 3204190090 |
Safety & GHS
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Health Hazard
GHS07
Hazard statements
- H315 Causes skin irritation
- H317 May cause an allergic skin reaction
- H319 Causes serious eye irritation
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P302+352 IF ON SKIN: Wash with soap and water
- P303+361 IF ON SKIN (or hair): Remove immediately all contaminated clothing. Rinse with water/shower
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P308+313 IF exposed or concerned: Get medical advice/attention
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- C.I. SOLVENT ORANGE 7
- Ceres Orange RR
- Fat Scarlet 2G
- Fettorange B
- Pyronalrot R
- Solvent Orange 7
- Sudan II
- Sudan Orange
- Sudan red
- Sudan Red II
Frequently asked questions
What is Sudan II (C.I. 12140) commonly used for?
Sudan II is primarily used as a dye in analytical chemistry, such as in thin-layer chromatography (TLC) for visualizing lipids, fats, and oils, and as a fat-soluble dye in research applications.
What is the chemical formula and molecular weight of Sudan II?
The chemical formula is **C₁₈H₁₆N₂O** and the molecular weight is **276.33 g/mol**.
How should Sudan II be stored?
Store Sudan II at **ambient temperature** in a tightly sealed container, away from light and moisture.
What grades or purity levels of Sudan II does Molekula supply?
Molekula supplies **analytical-grade Sudan II** with high purity for research and laboratory applications.
Can Molekula supply Sudan II in bulk quantities?
Yes, Molekula can supply Sudan II in bulk, subject to availability and minimum order quantities—please contact us for details.
What documentation comes with an order of Sudan II?
Each order includes a **Certificate of Analysis (CoA)**, Material Safety Data Sheet (MSDS), and a product specification sheet.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.