### Question
How is the "key component of a binary or multicomponent chemical system" defined?


### Answer
The term **key component of a binary or multicomponent chemical system** is defined in *18 U.S.C. § 229F* as follows -

> the precursor which plays the most important role in determining the toxic properties of the final product and reacts rapidly with other chemicals in the binary or multicomponent system

#### Citation:
  - *18 U.S.C. § 229F*
  - Heading: **PART I-CRIMES > CHAPTER 11B-CHEMICAL WEAPONS**

