Pyrene
General
Systematic name	pyrene
Other names	benzo(d,e,f)phenanthrene
Molecular formula	C16H10
SMILES	C12=CC=C3C=CC=C4 C=CC(C2=C34)=CC=C1
Molar mass	202.25 g/mol
Appearance	colorless or pale yellow solid
CAS number	[129-00-0][1]
Properties
Density and phase	1.271 g/ml
Solubility in water	0.135 mg/l
Melting point	145-148 °C (418-421 K)
Boiling point	404 °C (677 K)
Structure
Crystal structure	?
Dipole moment	? D
Hazards
MSDS	External MSDS
Main hazards	irritant
NFPA 704
Flash point	non-flammable
R/S statement	R: 36/37/38-45-53 S: 24/25-26-36
RTECS number	UR2450000
Supplementary data page
Structure and properties	n, εr, etc.
Thermodynamic data	Phase behaviour Solid, liquid, gas
Spectral data	UV, IR, NMR, MS
Related compounds
Related PAHs	benzopyrene
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references

Pyrene is a polycyclic aromatic hydrocarbon (PAH) consisting of four fused benzene rings, resulting in a large, flat aromatic system. Pyrene is a colorless or pale yellow solid. It forms during incomplete combustion of organic material and therefore can be isolated from coal tar along with a broad range of related compounds. Animal studies have shown pyrene is toxic to the kidneys and the liver. Image File history File links Chemical structure of pyrene Selfmade by cacycle File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... IUPAC nomenclature is a system of naming chemical compounds and of describing the science of chemistry in general. ... A chemical formula (also called molecular formula) is a concise way of expressing information about the atoms that constitute a particular chemical compound. ... General Name, Symbol, Number carbon, C, 6 Chemical series nonmetals Group, Period, Block 14, 2, p Appearance black (graphite) colorless (diamond) Atomic mass 12. ... ‹ The template below has been proposed for deletion. ... The simplified molecular input line entry specification or SMILES is a specification for unambiguously describing the structure of chemical molecules using short ASCII strings. ... Molar mass is the mass of one mole of a chemical element or chemical compound. ... CAS registry numbers are unique numerical identifiers for chemical compounds, polymers, biological sequences, mixtures and alloys. ... Density (symbol: ρ - Greek: rho) is a measure of mass per unit of volume. ... In the physical sciences, a phase is a set of states of a macroscopic physical system that have relatively uniform chemical composition and physical properties (i. ... It has been suggested that this article or section be merged with Solution. ... Water has the chemical formula H2O, meaning that one molecule of water is composed of two hydrogen atoms and one oxygen atom. ... The melting point of a solid is the temperature at which it changes state from solid to liquid. ... The boiling point of a substance is the temperature at which it can change its state from a liquid to a gas throughout the bulk of the liquid at a given pressure. ... Rose des Sables (Sand Rose), formed of gypsum crystals In mineralogy and crystallography, a crystal structure is a unique arrangement of atoms in a crystal. ... The Earths magnetic field, which is approximately a dipole. ... The debye (symbol: D) is a non-SI and non-CGS unit of electrical dipole moment. ... A material safety data sheet or MSDS is a form containing data regarding the properties of a particular substance. ... This page provides supplementary chemical data on pyrene. ... Worker safety and health is the prevention and reduction of the number of occupational safety and health hazards at the places of employment, providing safe and healthful working conditions. ... NFPA 704 is a standard maintained by the U.S. National Fire Protection Association. ... Image File history File links File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Image File history File links File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Image File history File links File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... The flash point of a fuel is the lowest temperature at which it can form an ignitable mix with air. ... Risk and Safety Statements, also known as R/S statements, R/S numbers, R/S phrases, and R/S sentences, is a system of hazard codes and phrases for labeling dangerous chemicals and compounds. ... R-phrases are defined in Annex III of European Union Directive 67/548/EEC: Nature of special risks attributed to dangerous substances and preparations. ... S-phrases are defined in Annex IV of European Union Directive 67/548/EEC: Safety advice concerning dangerous substances and preparations. ... RTECS, also known as Registry of Toxic Effects of Chemical Substances, is a database of toxicity information compiled from the open scientific literature that is available for charge. ... This page provides supplementary chemical data on pyrene. ... This page provides supplementary chemical data on pyrene. ... The refractive index of a material is the factor by which the phase velocity of electromagnetic radiation is slowed relative to vacuum. ... The dielectric constant εr (represented as or K in some cases) is defined as the ratio: where εs is the static permittivity of the material in question, and ε0 is the vacuum permittivity. ... This page provides supplementary chemical data on pyrene. ... This page provides supplementary chemical data on pyrene. ... Ultraviolet-Visible Spectroscopy or Ultraviolet-Visible Spectrophotometry (UV/ VIS) involves the spectroscopy of photons (spectrophotometry). ... IR spectrum of a thin film of liquid ethanol. ... Nuclear Magnetic Resonance Spectroscopy most commonly known as NMR Spectroscopy is the name given to the technique which exploits the magnetic properties of nuclei. ... It has been suggested that Mass spectrum be merged into this article or section. ... Benzopyrene, C20H12, is a five-ring polycyclic aromatic hydrocarbon that is mutagenic and highly carcinogenic. ... In chemistry, the standard state of a material is its state at 1 bar (100 kilopascals) and 25 degrees Celsius (298. ... Polycyclic aromatic hydrocarbons (PAHs) are chemical compounds that consist of fused aromatic rings and do not contain heteroatoms or carry substituents. ... Benzene, also known as C6H6, PhH, and benzol, is an organic chemical compound that is a colorless and flammable liquid with a pleasant, sweet smell. ... In chemistry, an aromatic molecule is one in which electrons are free to cycle around circular arrangements of atoms, which are alternately singly and doubly bonded to one another. ... Coal tar is the liquid by-product of the distillation of coal to make coke. ... Filmed by PETA, Covance primate-testing lab, Vienna, Virginia, 2004-5. ... Toxic redirects here, but this is also the name of a song by Britney Spears; see Toxic (song) Look up toxic and toxicity in Wiktionary, the free dictionary. ... Kidneys viewed from behind with spine removed The kidneys are bean-shaped excretory organs in vertebrates. ... The liver is one of the largest internal organs of the human body. ...

Pyrene is used commercially in dyes, pesticides, pharmaceuticals, and plastics. It is also a valuable molecular probe for fluorescence spectroscopy, having a high quantum yield and lifetime (0.65 and 410 nanosecond, respectively, in ethanol at 293K). Yarn drying after being dyed in the early American tradition, at Conner Prairie living history museum. ... A cropduster spreading pesticide. ... Pharmacology (in Greek: pharmacon is drug, and logos is science) is the study of how chemical substances interfere with living systems. ... Plastic covers a range of synthetic or semisynthetic polymerization products. ...

External links

• Pyrene

References

• Birks, J. B. (1969). Photophysics of Aromatic Molecules, London: Wiley.

• Valeur, B. (2002). Molecular Fluorescence: Principles and Applications, New York: Wiley-VCH.

Pyrene in Greek mythology is only known as the mother of Cycnus by Ares. // Greek mythology consists of a large collection of narratives that explain the origins of the world and detail the lives and adventures of a wide variety of gods, goddesses, heroes, and heroines. ... In Greek mythology, four people were known as Cycnus or Cygnus. ... In Greek mythology, Ares (battle strife; in Greek, Ἀρης), is the god of war and son of Zeus(king of the gods) and Hera . ...