# IIC — Certification marks and hazardous-area classifications: cross-market equivalences

For IIC, market / system is IEC / ATEX; applies to is Hydrogen / acetylene, recorded from its source on 2026-08-11.

- **Designation:** IIC _(verified: appears in the quote below)_
- **Market / system:** IEC / ATEX
- **Applies to:** Hydrogen / acetylene _(verified: appears in the quote below)_

## What the source says

> IIC | Hydrogen / acetylene

## Source

- https://www.inframena.com/hazardous-area-classification-equivalency-guide/

Last verified: 2026-08-11. Review by: 2027-08-11.
Part of [Certification marks and hazardous-area classifications: cross-market equivalences](https://referencesource.org/certification-standards-equivalence/).