NH15 HYDROGEN SELENIDE GAS

Q: Have Avon Protection tested their NH15 CBRN escape hood against Hydrogen Selenide gas?

A: NIOSH includes hydrogen selenide (H2Se) on its CBRN air‑purifying protection list, meaning it is covered under NIOSH testing using representative challenge agents. 

As a result, the NH15, when used as intended, may be used for emergency escape only to help the wearer evacuate to fresh air. Hydrogen selenide is an extremely toxic gas that can be immediately dangerous to life, so the NH15 must not be used to enter, remain in, or work in a contaminated area. In situations where higher concentrations may be present, or where conditions are uncertain, or oxygen levels are uncertain, an atmosphere‑supplying escape device may be the more appropriate choice. Always follow the NH15 labelling and user instructions and leave the area immediately.