Question

what is this arrow like symbol called​

Answer 1

An arrow is a graphical symbol such as ← or →, used to point or indicate direction, being in its simplest form a line segment with a triangle affixed to one end, and in more complex forms a representation of an actual arrow (e.g. ➵ U+27B5).

Answer 2

this represents that reactants converted to product in presence of particular temperature or elements or substance