Elements · ← Po Polonium · Rn Radon →
Astatine-211 is an alpha emitter studied for targeted alpha therapy.
| Symbol | At |
|---|---|
| Atomic number | 85 |
| Atomic mass | 209.98715(no standard atomic weight: the element has no stable isotopes or characteristic natural composition; PubChem lists this isotope mass) |
| Group | 17 |
| Period | 6 |
| Block | p-block |
| Category | Halogen |
| Standard state | Solid |
| Discovered | 1940 |
Source: PubChem, Astatine (periodic table data, retrieved 2026-10-19). Group and period follow the standard 18-column periodic table.
Bäck and colleagues attached astatine-211 to an anti-PSCA minibody; in mice it cut subcutaneous prostate tumour volumes by about 85% at six weeks and clearly inhibited growth of tumours in bone.
As reported in: Bäck, Jennbacken, Hagberg Thulin et al. (2020). Targeted alpha therapy with astatine-211-labeled anti-PSCA A11 minibody shows antitumor efficacy in prostate cancer xenografts and bone microtumors. EJNMMI Research. doi:10.1186/s13550-020-0600-z
Search Google Patents for astatine in biological and medical uses: all patents · recent applications (2022+)
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