ISO 14644-6:2007 was designed to harmonize the definitions of terms used to describe materials and processes in cleanroom environments. Instead of presenting new technical requirements for air cleanliness (which are covered in Part 1), Part 6 functioned as an international dictionary for the industry.
The following article explores the role of ISO 14644-6, its relationship to the broader ISO 14644 framework, and where to find official definitions today. What is ISO 14644-6?
The standard, titled "Cleanrooms and associated controlled environments — Part 6: Vocabulary," served as a specialized compendium for the terminology used across the entire ISO 14644 series. While it is a critical historical document for understanding the language of contamination control, it was officially withdrawn by the ISO Technical Committee 209. iso 146446 pdf
: The ISO 14644-6 Page provides the status and historical tracking of the document.
: Its primary goal was to prevent ambiguity in contract negotiations between buyers and sellers and to ensure a unified language for scientists and engineers worldwide. ISO 14644-6:2007 was designed to harmonize the definitions
As of mid-2026, . This means it is no longer the active "current" standard for vocabulary. Most modern ISO standards now integrate their specific definitions directly into the "Terms and Definitions" section (usually Section 3) of each individual part (e.g., ISO 14644-1:2015 contains the specific terms for air classification).
: It included terms from both the ISO 14644 series and the ISO 14698 series (biocontamination control). What is ISO 14644-6
: The Institute of Environmental Sciences and Technology (IEST) maintains historical versions within their ISO 14644 Series Handbook . The Broader ISO 14644 Framework
Because Part 6 was a vocabulary for other parts, it is essential to understand the "cornerstone" standards it supported: INTERNATIONAL STANDARD ISO 14644-2
