Paraformaldehyde, 4% in PBS + Mg + EGTA is used as a common fixative reagent for histology. It is also used to prepare pure formaldehyde.
Suenobu, T.; Isaka, Y.; Shibata, S.; Fukuzumi, S. Catalytic hydrogen production from paraformaldehyde and water using an organoiridium complex. Chem. Commun. 2015, 51, 1670-1672.
Liu, Q.; Yuan, K.; Arockiam, P. B.; Franke, R.; Doucet, H.; Jackstell, R.; Beller, M. Regioselective Pd-Catalyzed Methoxycarbonylation of Alkenes Using both Paraformaldehyde and Methanol as CO Surrogates. Angew. Chem. Int. Ed. 2015, 54 (15), 4493-4497.
Gefahrenhinweise (EU): H333-H315-H318-H317-H351
May be harmful if inhaled. Causes skin irritation. Causes serious eye damage. May cause an allergic skin reaction. Suspected of causing cancer.
Obtain special instructions before use. Avoid breathing dust/fume/gas/mist/vapours/spray. Wear protective gloves/protective clothing/eye protection/face protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.