Synhipol® MEHQ

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Synhipol® MEHQ

4-Methoxyphenol, CAS 150-76-5, MEHQ inhibitor, acrylic acid stabilizer

Synhipol® MEHQ is a highly effective polymerization inhibitor for the storage of acrylic acid and its ester derivatives.

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Synhipol® MEHQ

(Monomethyl Ether of Hydroquinone)


  • Chemical Name:4-Methoxyphenol;Mequinol;Hydroquinone methylether;HQMME;Leucodine B;Leucobasal;GUAIACOL;Decene

  • CAS No.:150-76-5

  • Molecular Formula:C7H8O2

  • Molecular Structure:

对羟基苯甲醚 结构式


General information :

Synhipol® MEHQ is a highly effective polymerization inhibitor for the storage of acrylic acid and its ester derivatives.

Specifications :


AppearanceWhite crystalline flakes
Purity> 99.5%
Melting Range54.0 – 56.0 °C
Hydroquinone< 0.05%
Residue on Ignition< 0.01%
Heavy Metals (as Pb)< 0.001%
p-DimethoxybenzeneNot detected
Color (Pt-Co Scale)< 10#
Loss on Drying< 0.3%



Application :
  • Used as a polymerization inhibitor in the production of monomers such as acrylonitrile, acrylic acid, acrylate esters, methacrylic acid, and methacrylate esters.

  • Also employed as an antioxidant, plasticizer, and in the synthesis of food additives (e.g., BHA).

  • Key advantage:

    • It does not need to be removed before use and can participate directly in the polymerization process.


Packaging :

25 kg/drum

Storage :

Store in a dry, clean, ventilated warehouse.
Avoid exposure to light and heat.
Be careful to prevent leakage, rain and sun during transportation.



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