### Question
How is the "refrigerant" defined?


### Answer
The term **refrigerant** is defined in *42 U.S.C. § 7671h* as follows -

> any class I or class II substance used in a motor vehicle air conditioner

#### Citation:
  - *42 U.S.C. § 7671h*
  - Heading: **SUBCHAPTER I-PROGRAMS AND ACTIVITIES > Subchapter Referred to in Other Sections**

