- Hafnium powder, dry
Hafnium powder, dry, is a grayish metallic colored powder.
Used for reactor control rods, in gas-filled & incandescent lamps, scavenger for oxygen & nitrogen.
Registry Numbers and Inventories.
Swiss Giftliste 1
Melting point, °C
Boiling point, °C
13.31 g/cm3 (20 C)
Solubility in water
0.052 P (2231 C)
Hazards and Protection.
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Wear appropriate protective gloves, clothing and goggles.
Wear positive pressure self-contained breathing apparatus (SCBA).
Keep sparks, flames, and other sources of ignition away. Keep material out of water sources and sewers. Land spill: Dig a pit, pond, lagoon, holding area to contain liquid or solid material. Apply approriate foam to diminish vapor and fire hazard. Water spill: Use natural barriers or oil spill control booms to limit spill travel.
May explosively decompose on shock, friction, or concussion. May explode on heating. The substance may spontaneously ignite on contact with air and at higher temperatures.
Reacts exothermically with compounds having active hydrogen atoms (such as acids and water) to form flammable hydrogen gas and caustic products May react with azo/diazo compounds to form explosive products Can react explosively with oxidizing materials.
Use suitable dry powder. Use dry chemical or carbon dioxide. Use water only if flooding quantities are available.
May react violently or explosively on contact with water. Some are transported in flammable liquids. May be ignited by friction, heat, sparks or flames. Some of these materials will burn with intense heat. Dusts or fumes may form explosive mixtures in air. Containers may explode when heated. May re-ignite after fire is extinguished.
Toxic gases and vapors (such as hydrogen chloride and carbon monoxide) may be released in a fire involving hafnium.
OSHA PEL: TWA 0.5 mg/m3 *Note: The PEL also applies to other Hf cmpds (as Hf). NIOSH REL: TWA 0.5 mg/m3 *Note: The REL also applies to other Hf cmpds (as Hf). NIOSH IDLH: 50 mg/m3 (as Hf)
Substance or decomposition products may cause severe injury or death.
Irritation of unabraded skin occurs with direct contact.
Eye irritation may be seen.
Seek medical assistance.
Move victim to fresh air. Apply artificial respiration if victim is not breathing. Administer oxygen if breathing is difficult.
Remove contaminated clothing and wash exposed area thoroughly with soap and water. A physician should examine the area if irritation or pain persists.
Irrigate exposed eyes with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility.
I; II; III
Std. Transport #