# Ethylene · NEC 500 (North America) — Gas group, temperature class and autoignition temperature by substance

For Ethylene, classification system is NEC 500 (North America); apparatus / gas group is Group C, recorded from its source on 2026-10-06.

- **Substance:** Ethylene _(verified: appears in the quote below)_
- **Classification system:** NEC 500 (North America) _(our reading, not quoted from the source)_
- **Apparatus / gas group:** Group C _(verified: appears in the quote below)_

## What the source says

**Apparatus / gas group:** The source prints this value inside the passage below but does not name it there. The passage shows where it appears; what ties it to this record is the position on the page, not anything the passage says.

> Ethylene Group C

## Source

- https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf

Last verified: 2026-10-06. Review by: 2028-10-05.
Part of [Gas group, temperature class and autoignition temperature by substance](https://referencesource.org/hazardous-area-substance-classification/).