U+21CC "⇌" Rightwards Harpoon over Leftwards Harpoon Unicode Character

U+21CC "⇌" Rightwards Harpoon over Leftwards Harpoon is a mathematical and scientific symbol commonly used to represent a reversible chemical reaction, indicating that the process can proceed in both forward and backward directions under the same conditions. Unlike the equilibrium sign (⇋), this character specifically places the rightward harpoon above the leftward one, and it is frequently employed in contexts of organic chemistry or physics to denote dynamic equilibria or bidirectional processes such as electron flow or resonance structures. Its typographic design combines two opposing harpoon arrows, with the top arrow pointing right and the bottom arrow pointing left, visually capturing the idea of simultaneous or competing directional movement.