Molekula
Orange G (C.I.16230)
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
Orange G (C.I. 16230) is a synthetic azo dye widely used in histopathology as a counterstain, particularly in Masson’s trichrome staining to differentiate collagen fibers. It also serves in textile dyeing, food coloring, and biological research applications. This chemical has a CAS number of 1936-15-8, with a molecular formula of C16H10N2Na2O7S2 and a molecular weight of 452.37. It is stable at ambient storage conditions and carries no signal word for hazard classification. Molekula supplies 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.
Often bought together
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.
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25 g — $82.70 per pack
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Specifications
| Property | Value |
|---|---|
| Appearance | Orange powder |
| Loss on Drying | ≤10.00% |
| Assay | >90% |
| Wavelength of Max. Absorption | 475.0–485.0 nm (in distilled water) |
| Specific Absorbance (E 1%/1cm) | 330–540 |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 42617597 |
| CAS Number | 1936-15-8 |
| IUPAC Name | disodium;7-hydroxy-8-phenyldiazenylnaphthalene-1,3-disulfonate |
| EC Number | 217-705-6 |
| Molecular Formula | C16H10N2Na2O7S2 |
| Molecular Weight | 452.37 |
| Exact Mass | 451.9725 |
| SMILES | C1=CC=C(C=C1)N=NC2=C(C=CC3=CC(=CC(=C32)S(=O)(=O)[O-])S(=O)(=O)[O-])O.[Na+].[Na+] |
| InChIKey | HSXUHWZMNJHFRV-UHFFFAOYSA-L |
| InChI | InChI=1S/C16H12N2O7S2.2Na/c19-13-7-6-10-8-12(26(20,21)22)9-14(27(23,24)25)15(10)16(13)18-17-11-4-2-1-3-5-11;;/h1-9,19H,(H,20,21,22)(H,23,24,25);;/q;2*+1/p-2 |
| PubChem CID | 16015 |
| REACH Code | Y113 |
| TSCA Listed | Yes |
| HTS Code | 3212900050 |
| Tariff Code | 3212900000 |
Safety & GHS
Precautionary statements
- P264 Wash thoroughly after handling
- P280 Wear protective gloves/protective clothing/eye protection/face protection
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Russian, 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
- Acid orange 10
- Acid Orange G
- C.I. 16230
- C.I. Acid Orange 10
- C.I. Acid Orange No. 10
- C.I. Food Orange 4
- C.I. Orange G
- Light Orange G
- Orange G
- Orange G dye
Frequently asked questions
What is Orange G (C.I. 16230) commonly used for?
Orange G is primarily used as a dye in textiles, leather, paper, and cosmetics, as well as a pH indicator in analytical chemistry.
What is the chemical formula and molecular weight of Orange G?
The chemical formula is **C₁₆H₁₀N₂Na₂O₇S₂**, and the molecular weight is **452.37 g/mol**.
What safety classification does Orange G have under GHS?
Orange G carries **no signal word** under GHS, indicating it is classified as non-hazardous under standard handling conditions.
How should Orange G be stored?
Store Orange G at **ambient temperature** in a dry, well-ventilated area, away from direct sunlight and incompatible substances.
Does Molekula supply Orange G in bulk quantities?
Yes, Molekula can supply Orange G in bulk, with quantities tailored to your specific requirements—please contact us for pricing and logistics.
What documentation is provided with an order of Orange G?
Each order includes a **Certificate of Analysis (CoA)**, **Material Safety Data Sheet (MSDS/SDS)**, and a **packing list** for traceability and compliance.
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.