Pentaerythritol

Pentaerythritol

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Names
IUPAC name 2,2-Bis(hydroxymethyl)1,3-propanediol
Other names Hercules P 6, monopentaerythritol, tetramethylolmethane, THME, PETP, pentaerythrite, Pentek, Hercules Aqualon improved technical PE-200
Identifiers
CAS Number	115-77-5 Y
ChemSpider	7984 N
Jmol 3D model	Interactive image
UNII	SU420W1S6N Y
InChI InChI=1S/C5H12O4/c6-1-5(2-7,3-8)4-9/h6-9H,1-4H2 N Key: WXZMFSXDPGVJKK-UHFFFAOYSA-N N InChI=1/C5H12O4/c6-1-5(2-7,3-8)4-9/h6-9H,1-4H2 Key: WXZMFSXDPGVJKK-UHFFFAOYAH
SMILES OCC(CO)(CO)CO
Properties
Chemical formula	C5H12O4
Molar mass	136.15
Appearance	white solid
Density	1.396g/cm3
Melting point	260.5 °C (500.9 °F; 533.6 K)
Boiling point	276 °C (529 °F; 549 K) at 30 mmHg
Solubility in water	5.6 g/100 mL at 15 °C
Solubility	Soluble in methanol, ethanol, glycerol, ethylene glycol, formamide; insoluble in acetone, benzene, paraffin, ether, CCl4
Vapor pressure	0.00000008 mmHg (20°C)
Vapor pressure	{{{value}}}
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Pentaerythritol is an organic compound with the formula C₅H₁₂O₄. This white, crystalline polyol with the neopentane backbone is a versatile building block for the preparation of many polyfunctionalized compounds such as the explosive pentaerythritol tetranitrate and pentaerythritol tetraacrylate. Derivatives of pentaerythritol are components of alkyd resins, varnishes, polyvinyl chloride stabilizers, tall oil esters, and olefin antioxidants.

Halogen-free pentaerythritol esters are also environmentally friendly alternative to conventional electrical transformer fluids, being both readily biodegradable and non-hazardous in water. They advantageously replace polychlorobiphenyl (PCB), and even silicone-based or fluorinated hydrocarbons, as dielectric fluid in transformers. Their low volatility and high flash point give them an excellent resistance to ignition in case of major electrical failure and transformer rupture.

Pentaerythritol also finds use in pyrotechnics, as it is needed to make 'blue aluminium'.

Pentaerythritol was first synthesized in 1891 by German chemists Bernhard Tollens and his student P. Wigand.