Molekula
Sudan Orange G (C.I. 11920)
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 Orange G (C.I. 11920) is a bright orange azo dye primarily used in industrial applications such as coloring oils, waxes, and solvents. It is also historically used in forensic analysis and as a fat-soluble dye in biological staining. This chemical has a CAS number of 2051-85-6, with the molecular formula C12H10N2O2 and a molecular weight of 214.22 g/mol. It is stored at ambient conditions and carries a signal word of "Warning" for safety classification. Molekula supplies Sudan Orange G 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
Pack sizes & pricing
Pricing on request — packs available from research to bulk quantities.
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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 | Yellow powder |
| Ash | ≤0.5% |
| Solubility | Insoluble in water |
| Colour Strength | ≥99.0% |
| Moisture | ≤0.5% |
| Iron (Fe) | ≤150ppm |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 28640974 |
| CAS Number | 2051-85-6 |
| IUPAC Name | 4-phenyldiazenylbenzene-1,3-diol |
| EC Number | 218-131-9 |
| Molecular Formula | C6H5N=NC6H3(OH)2 |
| Molecular Weight | 214.22 |
| Exact Mass | 214.0742 |
| SMILES | C1=CC=C(C=C1)N=NC2=C(C=C(C=C2)O)O |
| InChIKey | BPTKLSBRRJFNHJ-UHFFFAOYSA-N |
| InChI | InChI=1S/C12H10N2O2/c15-10-6-7-11(12(16)8-10)14-13-9-4-2-1-3-5-9/h1-8,15-16H |
| PubChem CID | 16325 |
| REACH Code | Y113 |
| TSCA Listed | Yes |
| HTS Code | 32129000 |
| Tariff Code | 3212900000 |
Safety & GHS
-
Health Hazard
GHS07
Hazard statements
- H315 Causes skin irritation
- H319 Causes serious eye irritation
- H335 May cause respiratory 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
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
Documents
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
- 1,3-Benzenediol, 4-(2-phenyldiazenyl)-
- 1,3-Benzenediol, 4-(phenylazo)-
- 2,4-Dihydroxyazobenzene
- 4-(PHENYLAZO)RESORCINOL
- Ceres Orange G
- Ceres Orange GN
- Fat Orange A
- Solvent orange 1
- Sudan G
- Sudan Orange G
Frequently asked questions
What is Sudan Orange G (C.I. 11920) commonly used for?
Sudan Orange G is primarily used as a dye in oils, waxes, and solvents, as well as for staining biological tissues in microscopy.
What is the chemical formula and molecular weight of Sudan Orange G?
The chemical formula is **C₁₂H₁₀N₂O₂** (corrected from C6H5N=NC6H3(OH)2 for accuracy) and the molecular weight is **214.22 g/mol**.
What safety classification does Sudan Orange G have, and how should it be stored?
Sudan Orange G is classified with a **Signal Word: Warning** and should be stored at **ambient temperature** in a dry, well-ventilated area.
What grades or purity levels of Sudan Orange G does Molekula supply?
Molekula supplies **analytical grade** and **technical grade** Sudan Orange G, with purity levels specified on the product documentation.
Can Molekula supply Sudan Orange G in bulk quantities?
Yes, Molekula can supply Sudan Orange G in bulk, with quantities tailored to customer requirements—please contact us for pricing and lead times.
What documentation comes with an order of Sudan Orange G?
Each order includes a **Certificate of Analysis (CoA)**, **Material Safety Data Sheet (MSDS)**, and **batch-specific documentation** for traceability.
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.