Trioctylphosphine oxide (TOPO) is an organophosphorus compound with the formula OP(C8H17)3. Frequently referred to as TOPO, this compound is used as an extraction or stabilizing agent. It is an air-stable white solid at room temperature.

CAS：78-50-2
中文别名：三辛基氧化膦;三正辛基氧化膦;三正辛基氧化磷;三正辛基氧化膦(TOPO);氧化三正辛基膦;
英文别名：1-dioctylphosphoryloctane;Phosphine oxide, trioctyl-;
分子式：C24H51OP
分子量：386.635
精确质量：386.368
Psa：26.88
Logp：9.431

EINECS号：201-121-3

外观与性状：白色结晶粉末
密度：0,88 g/cm3
沸点：201-202°C2mm Hg(lit.)
熔点：50-52°C(lit.)
闪点：>230°F
折射率：1.447
水溶解性：Insoluble
稳定性：Stable. Incompatible with strong oxidizing agents.
储存条件：Keep container closed when not in use. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Refrigerator (approx 4ºC).

RTECS号：SZ1662500
安全说明：S26-S36/39-S39
WGK Germany：2
危险类别码：R38; R41
海关编码：32019090
包装等级：II
危险品标志：Xi
危险性描述：H315; H318; H412
危险标志：GHS05
信号词：Danger
危险性防范说明：P273; P280; P305 + P351 + P338 + P310

用途
有机溶剂。萃取剂。