The saturated hydrides of tervalent arsenic, having the general formula $\ce{As_{n}H_{n+2}}$. Individual members having an unbranched arsenic chain are named arsane, diarsane, triarsane, etc. The name of a saturated hydride of arsenic where one or more arsenic atoms have bonding number 5 is formed by prefixing locants and \(\lambda ^{5}\) symbols to the name of the corresponding arsane, e.g. $\ce{H2AsAsHAsH2}$ triarsane, $\ce{H4AsAsH3AsH4}$ 1\(\lambda ^{5}\),2\(\lambda ^{5}\),3\(\lambda ^{5}\)-triarsane. Hydrocarbyl derivatives of $\ce{AsH3}$ belong to the class arsines.