Other Trading Names:

  • 2,2-Bis(Hydroxymethyl)Propane-1,3-Diol
  • PETP
  • Pentaerythritol Mono
  • THME

CAS Number: 115-77-5

HS Code: 290542

Types of Packaging:

  • 25kg/Bag
  • 500kg/Bag
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Index name

98 Grade Pentaerythritol

95 Grade Pentaerythritol

Monopentaerythritol (%)

98 min

95 min




Hydroxyl group (%)

48.5 min

47.5 min

Moisture (%)

0.20 max

0.50 max

Residue ignition(%)

0.05 max

0.10 max

Color max



Chemical Description 

  • Pentaerythritol is also called 2, 2-double (hydroxymethyl)-1, 3-propanediol, four hydroxymethyl methane, MetabAuxil, Penetek. White crystal powder.
  • It was first found in 1882 by Tollens, and is colorless double tetrahedral crystal precipitated from dilute hydrochloric acid. The relative molecular mass is 136.15.
  • Relative density is 1.399. Melting point is 262 oC (industrial products containing 10%~15% Dipentaerythritol, melting point is 180~225 oC).
  • The boiling point is 276 oC (4.00 x 103 pa). The refractive index is 1.54~1.56.
  • Can sublimate. Slowly soluble in cold water, soluble in hot water, insoluble in carbon tetrachloride, ethyl ether, benzene, petroleum ether, ethanol, acetone, solubility at 25 oC (g/100 g) in water, methanol, ethanol, butylamine, dimethyl sulfoxide, ethanolamine are 0.75, 7.23, 0.33, 16, 16.5 4.5, respectively.
  • 1 g of Pentaerythritol can be dissolved in 18 ml of water at 15 oC.
  • Pentaerythritol will polymerize when heated to above melting point, and generates a shrinkage second shrinkage e four season three pentaerythritol, etc. Stability in the air. The hydroxyl groups of Pentaerythritol can form complex with many kinds of metal; Can directly react with nitric acid trough nitration; Under the effect of catalyst, the hydroxyl can be oxidized to acid; Can react with chlorine to generate the chloride; In acid medium, the product react with carbonyl compounds, generate cyclic acetal and ketal; Like other alcohols, can esterify with an acid or anhydride to generate four ester; The halides can dehalogenase to generate cyclic ether in the role of alkali.
  • The addition reaction intermediate of 3-hydroxy aldehyde can react with formaldehyde through Cannizzaro reaction to generate season four amyl alcohol and formic acid.
  • In 1938, it was first generated by the United States with acetaldehyde and five times the amount of formaldehyde in the reaction of calcium hydroxide solution systems.
  • It is the only production method used in the industry. Main purpose is to make explosives and synthetic resin (mainly used for various coatings).
  • Pentaerythritol can be used as a stabilizing agent, and has synergistic effect with zinc salt stabilizers, can replace allyl chloride to stabilize PVC.
  • General dosage is half serving. But the compatibility with the resin of this product is small, easy to bloom, and soluble in water, easy sublimation, easy deposit on processing equipment and interfere with the processing in the process of sublimation.
  • Pentaerythritol has low toxicity, from rat infection through the mouth to the dose of 40 g/kg body weight, no obvious toxic symptoms. The US Food and Drug Administration permits it for food packaging materials (FDA121.2566), the highest dosage is 0.4%.
  • Some reports and food studies showed that 85% of pentaerythritol were discharged from the urine after oral within 30 h.
  • Generally speaking, according to the usual route of exposure even under abnormal use concentration, no significant effect to health.
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