# Acetylene — Gas group, temperature class and autoignition temperature by substance

For Acetylene, classification system is IEC / ATEX; apparatus / gas group is IIC; temperature class is T2; ignition temperature (c) is 305, recorded from its source on 2026-08-06.

- **Substance:** Acetylene _(verified: appears in the quote below)_
- **Classification system:** IEC / ATEX _(our reading, not quoted from the source)_
- **Apparatus / gas group:** IIC _(verified: appears in the quote below)_
- **Temperature class:** T2 _(verified: appears in the quote below)_
- **Ignition temperature (C):** 305 _(verified: appears in the quote below)_
- **Ignition temperature (F):** 581 _(per ldpi-inc.com, not stated by the source above)_

## What the source says

> Acetylene | T2 | IIC | 305

## What ldpi-inc.com says

> Acetylene | A | 305 | 581 | 6,000 PSI | IIC

Source: https://ldpi-inc.com/resources/classification-codes/class-1-locations/

## Source

- https://www.e2s.com/guide-for-hazardous-areas/apparatus-groups-and-common-flammable-ga
- https://ldpi-inc.com/resources/classification-codes/class-1-locations/

Last verified: 2026-08-06. Review by: 2028-08-05.
Part of [Gas group, temperature class and autoignition temperature by substance](https://referencesource.org/hazardous-area-substance-classification/).