TE-L-Tyrosine

P026
Grade:
GMP product
Tested for bioburden and bacterial endotoxins
Description:
TE-L-Tyrosine is a chemical precursor for O-(2-[¹⁸F]fluoroethyl)-L-tyrosine (FET), a widely used ¹⁸F-labeled amino acid PET tracer.
FET is applied in clinical practice for imaging amino acid transport in brain tumors and for differentiation of tumor tissues using PET/CT.
Synonyms:
O-(2-Tosyloxyethyl)-L-tyrosine tert-butyl ester
Molar weight:
677.86 g/mol (net substance)
Molecular formula:
C₄₁H₄₃NO₆S (net substance)
CAS №:
478037-15-9
PubChem CID:
24861151
Retest date:
Not less than 18 months from the manufacturing date
Packaging:
2R/4ml or 8R/10ml Type I glass vials with bromobutyl rubber stoppers
Storage conditions:
–20 ±5 °C
Transportation at 2–8 °C (less than 1 month)
Available quantities:
0.1 mg; 1.0 mg; custom quantity upon request
Quality parameters

Quality parameters

Appearance: White solid
Identification:
– HPLC: Retention time of main peak corresponds to that of TE-L-Tyrosine reference standard
– Mass spectrometry: m/z = 677.9 ± 4
Residual heavy metals (ICP-OES): ≤ 100 ppm
Purity (HPLC): ≥ 98.0%
Bacterial endotoxins (gel-clot method): ≤ 10.0 EU/vial
Bioburden (microbial enumeration tests):
– TAMC ≤ 10² CFU/vial
– TYMC ≤ 10¹ CFU/vial
Bioburden tests are performed for non-sterile products.
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