Molekula
Rhodamine B (C.I. 45170)
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
Rhodamine B (C.I. 45170) is a fluorescent dye used in research, staining, and industrial applications. It is a synthetic organic compound with the molecular formula C₂₈H₃₁ClN₂O₃ and a molecular weight of 479.01 g/mol. Typical applications include dyeing paper, wool and silk, colouring plastics, biological staining, and serving as an analytical reagent for metals such as gold and mercury. It has a CAS number of 81-88-9 and should be stored at ambient temperatures. The substance is classified as dangerous. Molekula supplies Rhodamine B (C.I. 45170) 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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1 g — £22.00 per pack ex VAT · £26.40 inc. VAT
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25 g — £29.50 per pack ex VAT · £35.40 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 | Green Powder |
| Moisture | < 10% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 16917624 |
| CAS Number | 81-88-9 |
| IUPAC Name | [9-(2-carboxyphenyl)-6-(diethylamino)xanthen-3-ylidene]-diethylazanium chloride |
| EC Number | 201-383-9 |
| Molecular Formula | C₂₈H₃₁ClN₂O₃ |
| Molecular Weight | 479.01 |
| Exact Mass | 478.2023 |
| SMILES | CCN(CC)C1=CC2=C(C=C1)C(=C3C=CC(=[N+](CC)CC)C=C3O2)C4=CC=CC=C4C(=O)O.[Cl-] |
| InChIKey | PYWVYCXTNDRMGF-UHFFFAOYSA-N |
| InChI | InChI=1S/C28H30N2O3.ClH/c1-5-29(6-2)19-13-15-23-25(17-19)33-26-18-20(30(7-3)8-4)14-16-24(26)27(23)21-11-9-10-12-22(21)28(31)32;/h9-18H,5-8H2,1-4H3;1H |
| PubChem CID | 6694 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 32129000 |
| Tariff Code | 3212900000 |
Safety & GHS
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Corrosive
GHS05
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Health Hazard
GHS07
Hazard statements
- H302 Harmful if swallowed
- H318 Causes serious eye damage
- H412 Harmful to aquatic life with long lasting effects
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P273 Avoid release to the environment
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+312 IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P337+313 If eye irritation persists get medical advice/attention
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
- Basic Violet 10
- Brilliant Pink B
- Calcozine Red BX
- Rheonine B
- Rhodamine
- RHODAMINE B
- Rhodamine B chloride
- Rhodamine O
- Symulex Magenta F
- Tetraethylrhodamine
Frequently asked questions
What is Rhodamine B used for?
Rhodamine B is primarily used as a fluorescent dye in research, microscopy, and as a tracer in fluid dynamics. It is also used in the textile and plastic industries for coloring.
What is the chemical formula and molecular weight of Rhodamine B?
The chemical formula is C₂₈H₃₁ClN₂O₃ and the molecular weight is 479.01 g/mol.
How should Rhodamine B be stored?
Rhodamine B should be stored at ambient temperature, protected from light and moisture.
What grade is available for Rhodamine B?
Rhodamine B is available in analytical grade for laboratory use.
Can Molekula supply Rhodamine B in bulk?
Yes, Molekula can supply Rhodamine B in bulk quantities—please contact our sales team for pricing and availability.
What documentation comes with a Rhodamine B order?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS) with the shipment.
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.