m-PEG4-TCO
m-PEG4-TCO is commonly used in Click Chemistry reactions. The half-life of TCO is short as it will naturally isomerize into CCO (cis-cycloctene) and lose the reactivity. TCO compound is not recommended for long term storage.

Product Citations
- Nagao, K., Vargas Paniagua, E., Lei, K., Beckham, J. L., Worthington, P., Manthey, M., ... & Anikeeva, P. (2025). Adeno-associated viruses escort nanomaterials to specific cells and tissues. bioRxiv, 2025-04.
https://doi.org/10.1101/2025.04.04.647267