The LaTeX command for rightleftharpoons (⇌) is \rightleftharpoons (equilibrium (chemistry)).
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| Command | Package | Use it when |
|---|---|---|
\rightleftharpoons recommended | none | Equilibrium or reversible reaction. |
\ce{A + B <=> C} | mhchem | Chemistry: mhchem draws the arrow and sets formulas upright. |
\xrightleftharpoons[k_2]{k_1} | mathtools | Stretchy, with rate constants above and below. |
\leftrightharpoons | amssymb | Mirror image. |
Write \rightleftharpoons inside math mode, that is between $…$ for inline math or in a \[ … \] or equation block for display math. It is part of core LaTeX math, so no extra package is required.
$\mathrm{N_2 + 3H_2 \rightleftharpoons 2NH_3}$Open this example in the live preview: it renders as you type, with no compiler and no signup.
\hookrightarrow\hookleftarrow\twoheadrightarrow\twoheadleftarrow\rightharpoonup\rightharpoondown\leftrightharpoons\dashrightarrow\circlearrowleft\circlearrowright\xrightarrow{f}\xleftarrow{f}\longrightarrow\longleftarrowArrows in LaTeX: the full table or search all 350+ LaTeX symbols.
Use \rightleftharpoons in math mode; it needs no extra package. For example, $\mathrm{N_2 + 3H_2 \rightleftharpoons 2NH_3}$.
None: \rightleftharpoons is built into LaTeX, so no extra package is required.