Raney nickel: Encyclopedia II - Raney nickel - Safety

Raney nickel - Safety

Due to its large surface area and high volume of contained hydrogen gas, dry, activated Raney nickel is a pyrophoric material that should be handled under an inert atmosphere. Raney nickel is typically supplied as a 50% slurry in water. Care should be taken never to expose Raney nickel to air. Even after reaction, Raney nickel contains significant amounts of hydrogen gas, and will ignite when exposed to air.

Raney nickel will produce hazardous fumes when burning, and therefore the use of a gas mask is recommended when extinguishing fires caused by it. Additionally, acute exposure to Raney nickel may cause irritation of the respiratory tract, nasal cavities and pulmonary fibrosis if inhaled. Ingestion may lead to convulsions and intestinal disorders. It can also cause eye and skin irritation. Chronic exposure may lead to pneumonitis and other signs of sensitization to nickel like skin rashes ("nickel itch").^[12]

Nickel is also a proven carcinogen (IARC Group 2B, EU category 3) and teratogen, while the inhalation of fine aluminium oxide particles is associated with Shaver's disease. Care should be taken when handling these raw materials during laboratory preparation of Raney nickel. Moreover, activation of Raney nickel produces large amounts of hydrogen gas as a by-product, which is also highly flammable.^[12]

Adapted from the Wikipedia article "Safety", under the G.N U Free Docmentation License. Please also see http://en.wikipedia.org/wiki