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306312

Sigma-Aldrich

抑制剂清除剂

Prepacked column for removing hydroquinone and monomethyl ether hydroquinone

同義詞:

抑制剂去除剂

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About This Item

MDL號碼:
MFCD00081548
分類程式碼代碼:
12162002
PubChem物質ID:
329753550
NACRES:
NA.23
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蒸汽壓力

17 mmHg ( 20 °C)

形狀

beads

柱尺寸

17 mm × 240 mm

SMILES 字串

[Al]21O[Al](O2)O1

InChI

1S/2Al.3O

InChI 密鑰

TWNQGVIAIRXVLR-UHFFFAOYSA-N

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相關類別

一般說明

抑制剂清除剂填充物和即用型一次性预包装填充柱可方便地除去试剂或溶剂中添加的少量抑制剂，这些抑制剂可使试剂或溶剂保持稳定。R：20-37 S：22-38-36
• 用于需要在使用前除去稳定剂或抑制剂（氢醌 (HQ)、对苯二酚单甲醚（MEHQ、4-甲氧基苯酚）或 4-叔丁基邻苯二酚 (TBC)）的应用。
• 使用后填充柱可丢弃1，或用新的填充料填充全部容量的大约 3/4 即可再次使用。HQ/MEHQ 柱再填充量：约 21g。TBC 柱再填充量：约 30g。
• 近似柱容量：
HQ/MEHQ：3L (100ppm)
TBC：4L (15ppm)
• 建议不要将 TBC 柱和填充料用于极性溶剂，包括丙烯酸。建议这些应用中采用真空蒸馏。
操作简便：
1. 建议用少量单体预清洗预包装玻璃柱。
2.将单体（或溶剂）加入固定在柱上方的加料漏斗中。
3.将单体逐滴加入柱中。注意滴加速度，防止溢出柱。用适当的容器收集单体。
4.对于低熔点固态单体，使用过程中使柱温保持在熔点以上。
小心：过热可能使单体在柱上发生聚合。粘稠或高熔点单体应当用适当的溶剂稀释后再加入柱。
1未使用的柱可随固体化学废物一起丢弃。用过的填充料或填充柱应考虑单体（即将除去其中的抑制剂）的毒性和危害，再决定如何处理。

應用

抑制剂去除剂主要用于甲基丙烯酸甲酯单体（MMA）的纯化和对苯二酚的去除，其中MMA可用于合成聚甲基丙烯酸甲酯（PMMA）。[1][2]它也可以用于纯化和去除 N，N-二甲基丙烯酰胺（DMAA）和甲基丙烯酸羟乙酯（HEMA）中的抑制剂，从而制造用于金属吸收的低成本吸收剂。[3]

儲存類別代碼

11 - Combustible Solids

水污染物質分類（WGK）

WGK 3

閃點（°F）

Not applicable

閃點（°C）

Not applicable

個人防護裝備

Eyeshields, Gloves, type N95 (US)

從最近期的版本中選擇一個：

分析證明 (COA)

Lot/Batch Number
MKCV7379
MKCV7350
MKCS5932
MKCS5930
MKCS5809

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Lead (II) removal by poly (N, N-dimethylacrylamide-co-2-hydroxyethyl methacrylate)
Ramos-Jacques AL, et al.
European Polymer Journal, 101, 262-272 (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)
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)
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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文章

Initiator/Stabilizer FAQs

An article regarding common FAQs for initiators and stabilizers.

啟動劑/穩定劑常見問題集

一篇有關啟動劑和穩定劑常見問題的文章。

Questions

1–9 of 9 Questions  

  1. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

      Helpful?

  2. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

      Helpful?

  3. Would these work for removal of Topanol A, 2,4-Dimethyl-6-tert-butylphenol CAS Number:1879-09-0?

    1 answer

    1. This product is not tested for removal of Topanol A, but is expected to be suitable. The product is used for inhibitor removal for product 276685. Methacrylic anhydride, which contains 2,000 ppm Topanol A as inhibitor.

      Helpful?

  4. Which side of the column is the top versus the bottom?

    1 answer

    1. The label is placed at the top of the column and will include the lot number. The column is provided with a cap on each end; these caps would need to be removed when the column is in use, but replaced between uses.

      The glass wool plugs are present to hold the beads inside the column. Initially, a small volume of liquid will wet the glass wool. As more volume is added, the column will become saturated and then eventually pass through and out at the bottom of the column.

      Helpful?

  5. Can Product 306312, Inhibitor removers - Prepacked column for removing hydroquinone and monomethyl ether hydroquinone, be used to remove butylated hydroxytoluene (BHT)?

    1 answer

    1. 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.

      Helpful?

  6. How much can Product 306312, Inhibitor removers - Prepacked column for removing hydroquinone and monomethyl ether hydroquinone, hold at one time?

    1 answer

    1. This product has a bed volume of approximately 30 mL.

      Helpful?

  7. Can Product 306312, Inhibitor removers - Prepacked column for removing hydroquinone and monomethyl ether hydroquinone, be used more than once?

    1 answer

    1. 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.

      Helpful?

  8. What is the flow rate for Product 306312, Inhibitor removers - Prepacked column for removing hydroquinone and monomethyl ether hydroquinone?

    1 answer

    1. According to the manufacturer of this inhibitor removal column, the maximum recommended flow rate is 4 bed volumes (approximately 120 mL) per hour.

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  9. What is the Department of Transportation shipping information for this product?

    1 answer

    1. 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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