氯化镓 是一种无机化合物 ，化学式GaCl3 ，固态的氯化镓以二聚体形式Ga2 Cl6 存在。[ 1] 烷烃 ，这一溶解特性在金属卤化物里很罕见。它的路易斯酸性比氯化铝 弱。[ 2]
氯化镓可由金属镓 在氯气 加热反应，然后用升华提纯而得到。[ 3]
2 Ga + 3 Cl2 → 2 GaCl3 它也可以由氧化镓 与氯化亚砜 反应而成：[ 4]
Ga2 O3 + 3 SOCl2 → 2 GaCl3 + 3 SO2 它的水溶液在加热（170 °C）蒸干时，只能得到Ga(OH)Cl2 ·H2 O，而非GaCl3 。[ 5]
氯化镓和二甲氨基锂 反应，可以得到Ga[N(CH3 )2 ]3 或ClGa[N(CH3 )2 ]2 ，二甲氨基锂过量时，可以得到LiGa[N(CH3 )2 ]4 ；它和二(三甲基硅基)氨基钠 反应，可以得到Ga{N[Si(CH3 )3 ]2 }3 。[ 6] 锂 存在下，它和三甲基氯硅烷 反应，可以得到Ga[Si(CH3 )3 ]3 。[ 7]
它和三甲基硅基二叔丁基锑反应，可以得到含Ga3 Sb3 环的化合物{Cl2 GaSb[C(CH3 )3 ]2 }3 。[ 8] 2 N]3 形成加合物[PCl2 N]3 ·GaCl3 ，其中N参与配位。[ 9]
它和六氧化二氯 反应，可以得到高氯酸镓 。[ 10] 镓 加热反应，可以得到二氯化镓 。[ 11] 铝 还原，得到Ga[AlCl4 ]。[ 12] 氯化亚铜 反应，可以得到CuGaCl4 。[ 13] 氧化锂 或硫属化锂发生放热反应：[ 14]
3 GaCl3 + 5 Li2 O → 9 LiCl + LiGaO2 + Ga2 O3
3 GaCl3 + 3 Li2 E → 6 LiCl + Li2 E3 （E=S, Se, Te）
^ Wells, A.F. (1984) Structural Inorganic Chemistry, Oxford: Clarendon Press. ISBN 0-19-855370-6 .
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