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

For Acetylene, classification system is NEC 500 (North America); apparatus / gas group is A; ignition temperature (c) is 305; ignition temperature (f) is 581, recorded from its source on 2026-08-06.

- **Substance:** Acetylene _(verified: appears in the quote below)_
- **Classification system:** NEC 500 (North America) _(our reading, not quoted from the source)_
- **Apparatus / gas group:** A _(verified: appears in the quote below)_
- **Ignition temperature (C):** 305 _(verified: appears in the quote below)_
- **Ignition temperature (F):** 581 _(verified: appears in the quote below)_

## What the source says

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

## Source

- 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/).