Hydrogen Cyanide (HCN) Reference Tag
Hydrogen Cyanide (HCN) Reference Tag
Hydrogen cyanide (HCN) is one of the most dangerous gases encountered on the fireground — often present in smoke and capable of causing rapid incapacitation at relatively low concentrations.
This hydrogen cyanide reference tag gives you a fast, reliable way to interpret HCN ppm readings in the field without relying on memory.
Designed as a durable, field-ready cheat sheet, it attaches directly to your gas monitor or bunker gear so exposure limits, IDLH thresholds, and response guidance are always within reach.
Quick reference for HCN ppm readings and exposure limits
Clear thresholds for SCBA use, time limits, and IDLH conditions
Immediate context for life-threatening environments
No phone or manual needed during response
If you’re operating on the fireground or monitoring toxic gases, this is the fastest way to understand HCN readings under pressure.
Need help understanding gas readings? View our 4 Gas Monitor Cheat Sheet
What’s Included
1 × Hydrogen Cyanide (HCN) reference tag
Attachment option: lanyard or keyring with trigger snap
Specifications
Size: 4.4" × 2" (based on your page — confirm but consistent with your layout)
Material: 3-ply laminate
Marking: Laser-etched for long-term durability
How It’s Used
Attached to gas monitors or bunker gear
Used during fire response, overhaul, and confined space incidents
Provides quick interpretation of HCN readings without reference materials
Why It Matters
Hydrogen cyanide is a byproduct of modern fire loads and can be present even when conditions don’t appear immediately dangerous. Quick access to exposure limits and thresholds helps crews recognize risk early and operate safely.
