So either a potassium cyanide or sodium cyanide, these are used in synthesis in terms of making carbon-carbon bonds.

因此无论是氰化钾还是氰化钠，都被用来在合成过程中,制造碳碳键。

麻省理工公开课 - 化学原理课程节选

So if you're working with cyanide in the lab as potassium cyanide or sodium cyanide, those are what are called p h s's, it's a rating for different kinds of chemicals.

因此如果你在实验室中,需要用到氰化物，比如氰化钾或者氰化钠，这就是所谓的，“P，H，S“,这是化学药品有害程度的一个级别。

麻省理工公开课 - 化学原理课程节选