Hydrogen

For Hydrogen, classification system is IEC / ATEX; apparatus / gas group is IIC, recorded from its source on 2026-08-06.

Substance: Hydrogen verified
Classification system: IEC / ATEX our reading
Apparatus / gas group: IIC verified

Sourceexknowledge.com

Verified2026-08-06

Review by2028-08-05

DatasetGas group, temperature class and autoignition temperature by substance

Values marked our reading are our classification of what the source says — the source does not print them in those words. The quote below is the evidence for each one; judge it yourself.

What the source says

IIC | Hydrogen, acetylene, carbon disulphide

— exknowledge.com, retrieved 2026-08-06

Source

exknowledge.comhttps://exknowledge.com/pages/gas-groups.html

Last verified against source: 2026-08-06. Due for re-check by 2028-08-05. This page as Markdown · OKF bundle · full dataset as JSON.