What is pyrophoric gas?
Pyrophoric materials are substances that ignite instantly upon exposure to oxygen. They can also be water-reactive, where heat and hydrogen (a flammable gas) are produced.
What is an example of a pyrophoric gas?
An example of a pyrophoric gas is silane.
What are the characteristics of pyrophoric gas?
A pyrophoric gas is a chemical in a gaseous state that will ignite spontaneously in air at a temperature of 130 °F (54.4 °C) or below. How are Pyrophoric solids and liquids classified under HazCom 2012? All pyrophoric solids and liquids are classified as Category 1. Pyrophoric gas is an OSHA- defined hazard.
What are examples of pyrophoric materials?
Some examples of pyrophoric materials include: metal hydrides (sodium hydride, germane, lithium aluminum hydride) alkyl metal hydrides (butyllithium, trimethylaluminum, triethylboron) metal carbonyls (nickel carbonyl, iron pentacarbonyl) gases (arsine, diborane, phosphine, silane)
What causes pyrophoric?
It is formed by reaction of hydrogen sulfide with carbon steel. The iron in the steel reacts with hydrogen sulfide to create an iron crust scale on the metal surface. When a refinery processes sour crude oil, the hydrogen sulfide present in the crude oil causes this problem to develop.
What is pyrophoric metal?
Pyrophoric metals or alloys, n.o.s. are solids that are liable to spontaneously ignite when exposed to air. In contact with water they are liable to evolve hydrogen which is very flammable and could further intensify the fire.
What type of hazard is pyrophoric?
Pyrophoric chemicals are used in research to catalyze certain reactions and often are incorporated into final products. However, they pose significant physical hazards. They are liquids and solids that will ignite spontaneously in the presence of oxygen and water.
What causes Pyrophoricity?
Pyrophoricity is the tendency of a substance to burn spontaneously at room temperature. When a nascent particle is exposed to an oxidizing gas at room temperature, chemical reactions result in the formation of an oxide layer on the particle surface.
What is the primary hazard of pyrophoric gases?
Is pyrophoric a health hazard?
Where is pyrophoric found?
Pyrophoric materials are chemicals that can spontaneously ignite when exposed to air. They are often found in refinery piping, tanks, and vessels. A common pyrophoric material is pyrophoric iron sulfide.
What is pyrophoric lead?
A pyrophoric lead is prepared by pyrolysis of lead(II) tartrate. It can ignite spontaneously in contact with air. Materials. Test tube (16 mm x 160 mm), small spoon, metal tray with sand, burner, metal stand with clamp, matches.
What is a pyrophoric?
– Definition from Safeopedia What Does Pyrophoric Mean? What Does Pyrophoric Mean? Pyrophoric materials are substances that ignite instantly when exposed to oxygen. They can also have water-reactive properties, resulting in the production of heat and hydrogen (a flammable gas). Pyrophoric materials can have other hazardous qualities, including:
What temperature does pyrophoric gas explode?
Pyrophoric gas: A chemical in a gaseous state that will ignite spontaneously in air at a temperature of 130 degrees F (54.4 degrees C) or below. Pyrophoric gas — A chemical in a gaseous state that will ignite spontaneously in air at a temperature of 130 degrees F (54.4 degrees C) or below.
How are pyrophoric solids supplied?
Larger amounts are supplied in metal tanks similar to gas cylinders, designed so a needle can fit through the valve opening. A syringe, carefully dried and flushed of air with an inert gas, is used to extract the liquid from its container. Pyrophoric solids require the use of a sealed glove box flushed with inert gas.
Is silane pyrophoric gas?
Silane is a pyrophoric gas (capable of autoignition at temperatures below 54 °C /130 °F). For lean mixtures a two-stage reaction process has been proposed, which consists of a silane consumption process and a hydrogen oxidation process.