Arsine - AsH3

This page presents information about arsine - or arsenic trihydride - (AsH3), appropriate detection tools - Arsine gas detector -and respiratory protective equipment (gas mask or powered air respirator with B gas filter).

Arsine (AsH3) properties

Historically known for being used during the First World War as a chemical weapon, arsine (AsH3) – also known as arsenic trihydride – is present in many industrial processes. It is notably used in the steel industry in ferrous metal foundries (desulfurization systems cleaning), tin foundries, metal treatment, electronics sector and boiler descaling).

CAS TWA (8 hours) STEL (15 minutes) LEL IP Density / Air Filter / SCBA
7784-42-1 0.05 ppm 0.2 ppm 5.1 % 9.89 eV 2.7 B

Arsine effects on health

Colorless at ambient temperature, arsine (AsH3) is odorless at nascent state. Once in contact with air, it oxidizes and gets a pronounced garlic smell. As it is heavier than air, it penetrates organisms through the breathing tracts. Arsine is highly toxic when inhaled (R26) and harmful for the aquatic environment as it easily dissolves into water. Extremely flammable (R12), it can compose explosive mixtures between 5.1 and 78% volume..


Arsine effects on health, why use an  arsine gas detector and AsH3 respirator

Arsine effects on health (AsH3)

AsH3 respiratory protection (Arsine)

Arsine gas detector (AsH3)