Florbetaben is a synthetic stilbene derivative used as a beta-amyloid imaging ligand and is closely associated with the development and production of fluorine-18-labeled PET radiotracers for amyloid imaging. Non-radioactive Florbetaben has the molecular formula C21H26FNO3, molecular weight 359.44 g/mol, and CAS Registry Number 902142-97-6.
The corresponding radiolabeled compound, Florbetaben (¹⁸F), contains the radioactive fluorine-18 isotope and is used as a PET diagnostic radiopharmaceutical for visualization of beta-amyloid plaques in the brain. It has CAS 902143-01-5 and molecular mass approximately 358.45 g/mol.
Florbetaben is a neutral, achiral small molecule containing one E/Z-configured alkene and no defined stereocenters. Public chemical databases report a molecular weight of 359.44 g/mol, molecular formula C21H26FNO3, and calculated polar surface area of approximately 39.72 Ų.
Florbetaben is particularly relevant to pharmaceutical research involving amyloid-beta imaging and PET radiopharmaceutical development.
Florbetaben is primarily associated with beta-amyloid molecular imaging research. The F-18-labeled form is used in PET imaging to visualize amyloid-beta plaques in the brain. The radioactive tracer is designed to bind to beta-amyloid deposits, allowing their distribution and density to be assessed using PET imaging.
Non-radioactive Florbetaben can be used as a reference compound and research material in studies involving amyloid imaging, radiotracer development, analytical characterization and pharmaceutical research.
It is important to distinguish the non-radioactive compound from the clinical radiopharmaceutical.
Florbetaben (non-radioactive):
Florbetaben (¹⁸F):
Florbetaben F-18 is a positron-emitting radiotracer. After administration, the tracer can bind to beta-amyloid plaques in the brain. The fluorine-18 isotope produces a positron signal that can be detected using PET imaging, enabling visualization of amyloid-beta plaque distribution.
Florbetaben API can be supplied as a research and development material for analytical studies, reference applications and radiopharmaceutical development. Appropriate quality documentation and analytical characterization are important when the material is intended for pharmaceutical research or radiotracer manufacturing.
Relevant documentation may include:
For Florbetaben, quality evaluation should include appropriate chemical identity and purity testing. Because the clinically used F-18 form is a radiopharmaceutical, its finished-product quality requirements are substantially different from those of non-radioactive Florbetaben.
For Florbetaben F-18 finished product, regulatory documentation describes testing for radioactive concentration, radionuclidic identity and purity, radiochemical identity and purity, chemical identity, chemical content, chemical impurities, residual acetonitrile, bacterial endotoxins, sterility and filter integrity.
Therefore, these radiopharmaceutical release specifications should not be incorrectly entered as specifications for the non-radioactive Florbetaben API.
Florbetaben should be stored and handled according to the specific manufacturer's specification, packaging requirements and intended application. For research-grade material, the applicable supplier's storage instructions should be followed.
Florbetaben F-18 requires specialized radiopharmaceutical handling because fluorine-18 is radioactive and has a short physical half-life. Finished Florbetaben F-18 solution is manufactured and handled under controlled radiopharmaceutical conditions.
Florbetaben API should be packaged in a suitable, tightly closed container appropriate for pharmaceutical research and transportation. Packaging configuration may vary according to quantity, intended application and supplier specification.
Florbetaben F-18 finished products require specialized radiopharmaceutical packaging and controlled handling because of their radioactive nature.
| Parameter | Specification |
|---|---|
| Appearance | White to off-white crystalline powder |
| Identification | IR & HPLC compliant |
| Assay (HPLC) | NLT 98.0% by HPLC |
| Loss on Drying | NMT 1.0% |
| Residue on Ignition | NMT 0.5% |
| Heavy Metals | NMT 10 ppm |
| Water Content | NMT 0.5% |