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Sigma Aldrich Inhibitor removers

Catalog No. 311340500G Shop All MilliporeSigma Sigma Organic Chemistry Products
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Catalog No. Quantity
31-134-0500G 500 g
31-134-0250G 250 g
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Catalog No. 31-134-0500G Supplier Sigma Aldrich Supplier No. 311340500G
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Description

MilliporeSigma Sigma Organics products encompass a wide range of quality reagents, solvents, catalysts, and building blocks for organic synthesis. From benchtop discovery to process development and scale-up, Sigma Organics solutions are built to meet the needs of synthetic chemists.

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 100ppmTBC: 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.Easy-to-use:1. 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.

Specifications

MDL Number MFCD00081548
Quantity 500 g
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