Molekula
Erythrosin B
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
Erythrosin B is a synthetic fluorescent dye and food coloring, primarily used in pharmaceuticals, cosmetics, and biological staining applications for its red-orange hue. It is also employed as a tracer in scientific research and microscopy. This chemical has a CAS number of 15905-32-5, a molecular formula of C20H8I4O5, and a molecular weight of 835.9 g/mol. It is stable at ambient storage conditions and carries no signal word for hazard classification. Molekula supplies Erythrosin B 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.
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25 g — £101.80 per pack ex VAT · £122.16 inc. VAT
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Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | Orange/red/pink powder solid |
| Loss on Drying | ≤ 10 % |
| Assay | 87-100 % |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Melting Point | 303 °C |
Source: PubChem CID 3259 (Human Metabolome Database (HMDB))
Identification
| Property | Value |
|---|---|
| SKU | 39273343 |
| CAS Number | 15905-32-5 |
| IUPAC Name | 3',6'-dihydroxy-2',4',5',7'-tetraiodospiro[2-benzofuran-3,9'-xanthene]-1-one |
| EC Number | 240-046-0 |
| Molecular Formula | C20H8I4O5 |
| Molecular Weight | 835.9 |
| Exact Mass | 835.6551 |
| SMILES | C1=CC=C2C(=C1)C(=O)OC23C4=CC(=C(C(=C4OC5=C(C(=C(C=C35)I)O)I)I)O)I |
| InChIKey | OALHHIHQOFIMEF-UHFFFAOYSA-N |
| InChI | InChI=1S/C20H8I4O5/c21-11-5-9-17(13(23)15(11)25)28-18-10(6-12(22)16(26)14(18)24)20(9)8-4-2-1-3-7(8)19(27)29-20/h1-6,25-26H |
| PubChem CID | 3259 |
| REACH Code | Y113 |
| TSCA Listed | Yes |
| HTS Code | 3212900050 |
| Tariff Code | 321290000 |
Safety & GHS
Precautionary statements
- P264 Wash thoroughly after handling
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P308+313 IF exposed or concerned: Get medical advice/attention
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, 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
- 2',4',5',7'-Tetraiodofluorescein
- 3',6'-dihydroxy-2',4',5',7'-tetraiodospiro[2-benzofuran-3,9'-xanthene]-1-one
- ERYTHROSINE
- Erythrosine acid
- Erythrosine, phenolic
- Erythrosine, sodium anhydrous
- FD & C red no. 3
- Iodeosin
- Solvent Red 140
- Tetraiodofluorescein
Frequently asked questions
What is Erythrosin B commonly used for?
Erythrosin B is primarily used as a red fluorescent dye in biological stains, food coloring (E127), and as a tracer in medical and scientific research applications.
What is the chemical formula and molecular weight of Erythrosin B?
The chemical formula is **C₂₀H₈I₄O₅**, and the molecular weight is **835.9 g/mol**.
How should Erythrosin B be stored?
Store Erythrosin B at **ambient temperature** in a cool, dry place, away from direct sunlight and moisture.
What purity grades of Erythrosin B does Molekula offer?
Molekula supplies Erythrosin B in **analytical and technical grades**, suitable for research, industrial, and food-grade applications.
Can Molekula supply Erythrosin B in bulk quantities?
Yes, Molekula can provide Erythrosin B in **bulk quantities** upon request, with flexible packaging options for large-scale orders.
What documentation is included with an Erythrosin B order?
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.