Molekula
Xylidine Ponceau 2R (C.l. 16150)
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
Xylidine Ponceau 2R (C.I. 16150) is a synthetic red azo dye used primarily as a histological stain, notably in Masson's trichrome staining, where it is combined with acid fuchsin as the plasma stain. It provides vibrant red hues with good light and heat stability. This chemical has a CAS number of 3761-53-3, a molecular formula of C18H14N2Na2O7S2, and a molecular weight of 480.4225 g/mol. It is stored at ambient conditions and carries a signal word of Warning for safety classification. Molekula supplies Xylidine Ponceau 2R 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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10 g — $115.90 per pack
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25 g — $178.60 per pack
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 | Brownish red powder |
| Dye Content | ≥60.0% |
| Solubility in water | Soluble in water |
| Absorption maximum in water | 500nm - 510nm |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 84385615 |
| CAS Number | 3761-53-3 |
| IUPAC Name | disodium;4-[(2,4-dimethylphenyl)diazenyl]-3-hydroxynaphthalene-2,6-disulfonate |
| Molecular Formula | C18H14N2Na2O7S2 |
| Molecular Weight | 480.4225 |
| Exact Mass | 480.0038 |
| SMILES | CC1=CC(=C(C=C1)N=NC2=C3C=C(C=CC3=CC(=C2O)S(=O)(=O)[O-])S(=O)(=O)[O-])C.[Na+].[Na+] |
| InChIKey | DKUHOIWLFSTHJN-UHFFFAOYSA-L |
| InChI | InChI=1S/C18H16N2O7S2.2Na/c1-10-3-6-15(11(2)7-10)19-20-17-14-9-13(28(22,23)24)5-4-12(14)8-16(18(17)21)29(25,26)27;;/h3-9,21H,1-2H3,(H,22,23,24)(H,25,26,27);;/q;2*+1/p-2 |
| PubChem CID | 19579 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 3212.90.0050 |
| Tariff Code | 3212900000 |
Safety & GHS
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Serious Health Hazard
GHS08
Hazard statements
- H351 Suspected of causing cancer
Precautionary statements
- P201 Obtain special instructions before use
- P202 Do not handle until all safety precautions have been read and understood
- P281 Use personal protective equipment as required
- P308+313 IF exposed or concerned: Get medical advice/attention
- P403+233 Store in a well ventilated place. Keep container tightly closed
- P501 Dispose of contents/container to an approved waste disposal plant
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
- Acid Red 26
- C.I. 16150,
- C.I. Food Red 5
- Disodium;4-[(2,4-dimethylphenyl)diazenyl]-3-hydroxynaphthalene-2,6-disulfonate
- OIQRYZXXBZHDRY-NNIZZXHBSA-L
- Ponceau de xylidine
- Ponceau Red R
Frequently asked questions
What is Xylidine Ponceau 2R (C.I. 16150) used for?
Xylidine Ponceau 2R is primarily used as a histological stain, notably in Masson's trichrome staining, where it is combined with acid fuchsin as the plasma stain. It is not a permitted food colour in the US or the EU.
What is the chemical formula and molecular weight of Xylidine Ponceau 2R?
The chemical formula is C₁₈H₁₄N₂Na₂O₇S₂, and the molecular weight is 480.42 g/mol.
How should Xylidine Ponceau 2R be stored?
Store in a tightly sealed container at ambient temperature, away from direct sunlight and moisture.
What grades or purity levels are available for Xylidine Ponceau 2R?
Molekula supplies technical-grade Xylidine Ponceau 2R, with purity levels specified per order.
Can Molekula supply Xylidine Ponceau 2R in bulk quantities?
Yes, we offer bulk packaging options (e.g., 1 kg, 5 kg, 25 kg) for industrial and large-scale applications.
What documentation comes with an order of Xylidine Ponceau 2R?
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.