Present name. - Trihydride of Arsenic. Arseniuretted Hydrogen. AsH3.

Prepared by fusing Metallic Arsenic with its own weight of granulated Zinc, and decomposing the alloy with strong Hydrochloric Acid.

Characters and Tests. - A very poisonous colourless gas, with a strong Garlic smell, burning with a blue flame if ignited, depositing Metallic Arsenic on the sides of a cool tube held over the flame.

Reference to Horn. Proving. - Noack and Trinks.

Preparation. - Solution in water, which absorbs one-fifth of its volume.