What is Pan in smog?

Peroxyacyl nitrates (also known as Acyl peroxy nitrates, APN or PANs) are powerful respiratory and eye irritants present in photochemical smog. PANs are both toxic and irritating, as they dissolve more readily in water than ozone.

What is Pan formula?

C2H3NO5
Peroxyacetyl nitrate/Formula

What is Pan material?

Polyacrylonitrile (PAN), also known as polyvinyl cyanide and Creslan 61, is a synthetic, semicrystalline organic polymer resin, with the linear formula (C3H3N)n. Though it is thermoplastic, it does not melt under normal conditions. PAN fibers are the chemical precursor of very high-quality carbon fiber.

What is Pan in ecology?

Peroxyacyl nitrates are a family of compounds which result from photochemical reactions between contaminants released to the atmosphere by combustion of organic fuels. Peroxyacetyl nitrate (PAN) is the most abundant member of this family and is responsible for serious plant injury in some polluted areas.

What do you mean by Peroxyacetyl nitrate?

Peroxyacetyl nitrate is a peroxyacyl nitrate. It is a secondary pollutant present in photochemical smog. It is thermally unstable and decomposes into peroxyethanoyl radicals and nitrogen dioxide gas. It is a lachrymatory substance, meaning that it irritates the lungs and eyes.

Is Pan a secondary air pollutant?

Peroxyacetyl nitrate (PAN) and ozone are the two important secondary photochemical air pollutants found in the urban at- mosphere (1-3). Of the two, PAN is the more useful indicator of photochemical reactions in polluted air as, unlike ozone, it appears to have no large natural source (2-7).

What is the formula of Peroxyacetyl nitrate?

What is the meaning of Peroxyacetyl nitrate?

Peroxyacetyl nitrate (PAN) is a component of photochemical smog, injurious to plants at a concentration of more than 0.05 parts per million (p.p.m).

What is made of polyacrylonitrile?

Most polyacrylonitrile is produced as acrylic and modacrylic fibre, a common substitute for wool in clothing and home furnishings.

Is polyacrylonitrile an addition polymer?

Polyacrylonitrile is an example of addition polymer.

Is Peroxyacetyl nitrate a secondary pollutant?

Peroxyacetyl nitrate is a peroxyacyl nitrate. It is a secondary pollutant present in photochemical smog. It is thermally unstable and decomposes into peroxyethanoyl radicals and nitrogen dioxide gas. Peroxyacetyl nitrate, or PAN, is an oxidant that is more stable than ozone.

Is Pan a VOC?

Peroxyacetyl nitrate (PAN), the most abundant APN, is derived from both anthropogenic and biogenic VOCs. Some NOx is converted into the acyl peroxy nitrate reservoir, the lifetime of which increases dramatically at low temperatures.