I bought a few of the Rayvio xp series UV-C leds for the same reasons. They are specifically made for medical applications: http://www.rayvio.com/wp-content/uploads/2017/05/DS04-RayVio-XP-Datasheet.pdf
https://www.digikey.com/en/product-highlight/r/rayvio/xp-series-uv-emitter