三光气，又称固体光气，化学名称为碳酸三氯甲基酯，双(三氯甲基)碳酸酯，三光气为白色晶体，类似光气的气味。稳定性较强，在沸点时仅有少量分解，生成氯甲酸三氯甲酯和光气。
A method to analyze the quantitative triphosgene by Fourier Transform Infrared Spectrometry is reported.
三光气的含量的测定至今未见报道。
参考来源 - 三光气的制备、测定及应用研究β-phenylethyl isocyanate and tran-1-isocyanato-4-methyl cyclohexane were prepared through reaction of β-phenylethylamine and trans-4-methyl clyclohexanamine with triphosgene,respectively.
2-苯乙胺、反式-4-甲基环己胺分别与三光气反应生成相应的异氰酸酯。
参考来源 - 三光气法合成降糖药格列美脲·2,447,543篇论文数据，部分数据来源于NoteExpress
用三光气代替光气合成化合物能有效消除光气的危险性，在生产中具有较广泛的应用前景。
The risk of reaction using phosgene could be avoided effectively by substitution of triphosgene for phosgene, and application of triphosgene in production with broad prospect was believed by author.
以三光气(BTC)和四溴双酚a (TBBPA)为原料，经界面缩聚合成了高分子量四溴双酚a聚碳酸酯。
Tetrabromobisphenol-A polycarbonate (TBBPA-PC) was synthesized by interfacial polymerization with triphosgene (BTC) and tetrabromobisphenol a (TBBPA) as raw materials.
三光气作为剧毒的光气和双光气在合成中的替代物，不但毒性低，使用安全方便，而且反应条件温和、选择性好、收率高。
The triphosgene, being as the substitute for phosgene and diphosgene in synthesis, is not only low-toxic but also safe and convenient to use with mild conditions, good selectivity and high yields.
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