306312
Inhibitor removers
Prepacked column for removing hydroquinone and monomethyl ether hydroquinone
Recommended Products
vapor pressure
17 mmHg ( 20 °C)
Quality Level
form
beads
column size
17 mm × 240 mm
InChI
1S/2Al.3O
InChI key
TWNQGVIAIRXVLR-UHFFFAOYSA-N
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General description
• 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.
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.
Application
WGK
WGK 3
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
Personal Protective Equipment
Certificates of Analysis (COA)
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If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.
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The lot specific COA document can be found by entering the lot number above under the "Documents" section.
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How much can Product 306312, Inhibitor removers - Prepacked column for removing hydroquinone and monomethyl ether hydroquinone, hold at one time?
This product has a bed volume of approximately 30 mL.
What is the flow rate for Product 306312, Inhibitor removers - Prepacked column for removing hydroquinone and monomethyl ether hydroquinone?
According to the manufacturer of this inhibitor removal column, the maximum recommended flow rate is 4 bed volumes (approximately 120 mL) per hour.
Can Product 306312, Inhibitor removers - Prepacked column for removing hydroquinone and monomethyl ether hydroquinone, be used to remove butylated hydroxytoluene (BHT)?
This inhibitor remover is not intended to remove BHT present in a monomer solution; little, if any, BHT will be removed with this column. Unfortunately, Sigma-Aldrich does not currently offer a inhibitor-remover column that will accomplish this purpose.
Can Product 306312, Inhibitor removers - Prepacked column for removing hydroquinone and monomethyl ether hydroquinone, be used more than once?
This pre-packed inhibitor remover column is meant for single use but can be rinsed and reused. If time will pass between uses, this column can be rinsed with methanol, dried, capped on both ends, and stored in a tightly sealed plastic bag in the freezer at -20°C.
What is the Department of Transportation shipping information for this product?
Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product.
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