Molekula
Erythrosin B dye content >95%
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 bright red fluorescent dye, primarily used in food coloring (E127), cosmetics, biological stains, and research applications for its vivid hue and fluorescence properties. It is also employed in microscopy and as a tracer in scientific studies. This high-purity Erythrosin B (dye content >95%) has a CAS number of 15905-32-5, molecular formula C20H8I4O5, and molecular weight of 835.9 g/mol. It is stable at ambient storage conditions with no signal word classification required. 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
Pack sizes & pricing
Pricing on request — packs available from research to bulk quantities.
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Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | Dark red coloured powder |
| Melting Point | 303°C |
| Dye Content | >95% |
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 | 90035502 |
| 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
- 3',6'-dihydroxy-2',4',5',7'-tetraiodospiro[2-benzofuran-3,9'-xanthene]-1-one
- Erythrosin B
- 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 primarily used for?
Erythrosin B is commonly used as a red dye in food, cosmetics, and biological stains, as well as in fluorescence microscopy and as a pH indicator.
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 grade is available for Erythrosin B from Molekula?
Molekula supplies Erythrosin B with a **dye content >95%**, suitable for high-purity applications.
Can Molekula supply Erythrosin B in bulk quantities?
Yes, Molekula can provide Erythrosin B in bulk, with quantities tailored to your specific requirements.
What documentation comes with an order of Erythrosin B?
Each order includes a **Certificate of Analysis (CoA)**, Material Safety Data Sheet (MSDS), and batch-specific documentation.
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.