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Inhibitor removers

Prepacked column for removing hydroquinone and monomethyl ether hydroquinone

MDL number:
PubChem Substance ID:

vapor pressure

17 mmHg ( 20 °C)

Quality Level



column size

17 mm × 240 mm



InChI key


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General description

Inhibitor-remover packings and ready-to-use, disposable prepacked columns conveniently remove small amounts of inhibitors which are added to reagents or solvents that would otherwise be unstable. R: 20-37 S: 22-38-36
• Useful in applications which require that the stabilizer or inhibitor (hydroquinone (HQ), hydro-quinone monomethyl ether (MEHQ, 4-methoxyphenol), or 4-tert-butylcatechol (TBC) be removed prior to use.
• Columns may be discarded1 when exhausted or reused by filling column approximately 3/4 full with new packing material. HQ/MEHQ columns refill vol.: ~21g. TBC column refill vol.:~30g.
• Approx. column capacity:
HQ/MEHQ: 3L at 100ppm
TBC: 4L at 15ppm
• TBC columns and packings are not recommended for use with polar solvents, including acrylic acid. Vacuum distillation is suggested for such applications.
Prewashing of prepacked glass columns with a small amount of monomer is recommended.
2. Add monomer (or solvent) to an addition funnel which is secured above column.
3. Add monomer dropwise to the column. Monitor rate of addition to prevent overflow of the column. Collect monomer in an appropriate container.
4. For low-melting solid monomers, keep temperature of column above the melting point during use.
Caution: Overheating may cause monomer to polymerize on the column. Viscous or high-melting monomers may be diluted in an appropriate solvent before addition to the column.
1Unused columns can be discarded with other solid chemical waste. After use, the toxicity and hazards of the monomer, from which the inhibitor is being removed, should be considered in deciding how to dispose of the packing material or column.


Inhibitor remover is mainly used in the purification of methyl methacrylate monomer (MMA) and the removal of hydroquinone, which can be used for the synthesis of polymethyl methacrylate (PMMA). It can also be used to purify and remove the inhibitor in N,N-dimethylacrylamide (DMAA) and hydroxylethyl methacrylate (HEMA), that can be used to fabricate a low-cost absorbent for metal absorption.

Storage Class Code

11 - Combustible Solids



Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Tibor Renkecz et al.
ACS applied materials & interfaces, 5(17), 8537-8545 (2013-08-22)
A versatile approach for the preparation of photoswitchable molecularly imprinted polymers (MIPs) is proposed where the selective recognition and the photoresponsive function are assumed by two different monomers. As a proof of concept, MIP microspheres were synthesized by precipitation polymerization
Electrically conductive nanocomposites of PMMA and carbon nanotubes prepared by in situ polymerization under probe sonication.
Bressanin JM, et al.
Chemical Papers, 1-12 (2018)
Study on the rheological and electrical properties of PMMA/MWCNT nanocomposites prepared by in situ polymerization assisted by sonication.
Junior VAA, et al.
AIP Conference Proceedings, 1981(1), 020077-020077 (2018)
Lead (II) removal by poly (N, N-dimethylacrylamide-co-2-hydroxyethyl methacrylate)
Ramos-Jacques AL, et al.
European Polymer Journal, 101, 262-272 (2018)
Subir Ghosh et al.
Journal of the mechanical behavior of biomedical materials, 87, 312-324 (2018-08-14)
A significant number of hip replacements (HR) fail permanently despite the success of the medical procedure, due to wear and progressive loss of osseointegration of implants. An ideal model should consist of materials with a high resistance to wear and


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