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 1999 · 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 (C.I.16230) at >90% purity in 25 g packs, from £52.32 inc. VAT. It is in stock for same-day dispatch. Every batch ships with a certificate of analysis, and safety data sheets are available in 6 languages. Larger quantities, up to multi-tonne, are quoted on request.
Example image for illustration only. Other packaging and pack sizes are available.
Often bought together
Pricing & pack sizes
In stock — same-day dispatch
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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25 g — £43.60 per pack ex VAT · £52.32 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 | 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.
Quality certificates
Molekula Group is certified to ISO 9001:2015 (quality) and ISO 14001:2015 (environmental management), audited by a UKAS-accredited body. Both certificates are valid to 17 May 2028.
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.
Where can I buy Orange G (C.I.16230)?
Directly from Molekula, which lists Orange G (C.I.16230) in 25 g packs from £52.32 inc. VAT, with a certificate of analysis for every batch. Larger quantities are quoted on request. Molekula's offices: United Kingdom, France, Spain, Germany, Italy, United States and China.
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.