Neutral formalin does not belong to the scope of medical device management. If it belongs to which category, if not, what management?

Found in the database of the US Food and Drug Administration:

* * * There are two records in the contents list of "Domestic Instruments" and "Neutral Formalin".

1. Neutral formalin fixative (E-Han American Food and Drug Administration (quasi) ZiNo. 1400056 Wuhan Landing Medical High-tech Co., Ltd.)

2. 10% neutral formalin fixative (containing phosphate buffer) (Beijing Century Heli Biotechnology Co., Ltd. (J.Y.J. (quasi) Zi 20 10No. 1400874)

From this point of view, it should belong to equipment, and those approved by local bureaus should belong to the same category.