Molekula
Rhodamine B base (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 base (C.I. 45170) is a bright pink fluorescent dye widely used in biological staining, flow cytometry, and laser marking applications due to its strong absorption and emission properties. This synthetic organic compound is also employed in textiles, plastics, and as a tracer in environmental studies. It has a CAS number of 509-34-2, a molecular formula of C28H30N2O3, and a molecular weight of 442.5494 g/mol. Store at ambient conditions, but handle with care as it carries a **Danger** signal word for toxicity and environmental hazards. Molekula supplies Rhodamine B base 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.
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
Specifications available on request — see Documents below or contact our sales team.
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 9 |
| Packing Group | III |
| Acidity | Base |
Identification
| Property | Value |
|---|---|
| SKU | 23257295 |
| CAS Number | 509-34-2 |
| IUPAC Name | 3',6'-bis(diethylamino)spiro[2-benzofuran-3,9'-xanthene]-1-one |
| EC Number | 208-096-8 |
| Molecular Formula | C28H30N2O3 |
| Molecular Weight | 442.5494 |
| Exact Mass | 442.2256 |
| SMILES | CCN(CC)C1=CC2=C(C=C1)C3(C4=C(O2)C=C(C=C4)N(CC)CC)C5=CC=CC=C5C(=O)O3 |
| InChIKey | DZNJMLVCIZGWSC-UHFFFAOYSA-N |
| InChI | InChI=1S/C28H30N2O3/c1-5-29(6-2)19-13-15-23-25(17-19)32-26-18-20(30(7-3)8-4)14-16-24(26)28(23)22-12-10-9-11-21(22)27(31)33-28/h9-18H,5-8H2,1-4H3 |
| PubChem CID | 62357 |
| UN Number | UN3077 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 32129000 |
| Tariff Code | 3212900000 |
Safety & GHS
-
Corrosive
GHS05
-
Health Hazard
GHS07
-
Hazardous to the Environment
GHS09
Hazard statements
- H302 Harmful if swallowed
- H315 Causes skin irritation
- H318 Causes serious eye damage
- H335 May cause respiratory irritation
- H411 Toxic 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
- P302+352 IF ON SKIN: Wash with soap and water
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
Documents
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
- Aizen Rhodamine B Base
- C.I. Solvent Red 49
- Eljon Magenta Toner
- Lacquer Pink S
- Rhodamine B base
- Rhodamine B lactone
- Rhodamine S lactone
- Solvent Red 49
- Waxoline Rhodamine B
- Waxoline Rhodamine BS
Frequently asked questions
What is Rhodamine B base (C.I. 45170) commonly used for?
Rhodamine B is primarily used as a fluorescent dye in biological stains, lasers, and as a tracer in environmental studies, as well as in plastics, inks, and textiles.
What is the chemical formula and molecular weight of Rhodamine B base?
The chemical formula is **C₂₈H₃₀N₂O₃** with a molecular weight of **442.5494 g/mol** (CAS 509-34-2).
What safety classification and storage conditions apply to Rhodamine B base?
It is marked with the **signal word 'Danger'** and should be stored at **ambient conditions** in a cool, dry place, away from incompatible substances.
Does Molekula supply Rhodamine B base in bulk quantities?
Yes, Molekula can supply Rhodamine B base in bulk, with flexible packaging options (e.g., drums, bags) depending on order volume.
What grade or purity is available for Rhodamine B base from Molekula?
Molekula provides **analytical grade** and **technical grade** Rhodamine B base, with purity specifications available upon request.
What documentation is included with a Rhodamine B base 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.