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/418/501/product-dating-information-06-25-mk.pdf
44504
Dowex 50W X8 Ion Exchange Resin
hydrogen form, 16-50 mesh, strongly acidic
Select a Size
| Pack Size | SKU | Availability | Price |
|---|---|---|---|
| 100 g | Available to ship TODAYfromMILWAUKEE | $553.00 |
About This Item
Product Name
Dowex 50W X8, hydrogen form, strongly acidic, 16-50 mesh
description
cross-linkage 8%
Quality Level
form
beads
moisture
50-58%
technique(s)
LPLC: suitable
matrix
styrene divinylbenzene (gel)
matrix active group
sulfonic acid functional group
particle size
16-50 mesh
capacity
1.1 meq/mL by wetted bed volume
separation technique
cation exchange
SMILES string
C(C)c3c(cccc3)C=C.c2(c(cccc2)C=C)C=C.c1(ccccc1)C=C
InChI
1S/C10H12.C10H10.C8H8/c2*1-3-9-7-5-6-8-10(9)4-2;1-2-8-6-4-3-5-7-8/h3,5-8H,1,4H2,2H3;3-8H,1-2H2;2-7H,1H2
InChI key
NWUYHJFMYQTDRP-UHFFFAOYSA-N
General description
Application
- As stripper resin and can be regenerated by 0.25N sulphuric acid when exhausted.
- As a catalyst.
- In deionizing supernatant fraction samples for paper chromatography.
Dowex 50WX8 hydrogen form may be used in separation medium for TLC, paper chromatography and LPLC.
Legal Information
1 of 1
This Item | |||
|---|---|---|---|
| matrix active group sulfonic acid functional group | matrix active group sulfonic acid functional group | matrix active group sulfonic acid functional group | matrix active group SCX |
| matrix styrene divinylbenzene (gel) | matrix styrene divinylbenzene (gel) | matrix styrene-divinylbenzene (gel) | matrix PS-DVB |
| separation technique cation exchange | separation technique cation exchange | separation technique cation exchange | separation technique cation exchange |
| particle size 16-50 mesh | particle size 50-100 mesh | particle size 50-100 mesh | particle size 180-500 μm |
| form beads | form beads | form beads | form beads |
| technique(s) LPLC: suitable | technique(s) LPLC: suitable | technique(s) LPLC: suitable | technique(s) LPLC: suitable |
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signalword
Warning
hcodes
pcodes
Hazard Classifications
Eye Irrit. 2
Storage Class
11 - Combustible Solids
wgk
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
dust mask type N95 (US), Eyeshields, Gloves
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Global Trade Item Number
| SKU | GTIN |
|---|---|
| 44504-100G | 04061838514707 |
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How can I determine the shelf life / expiration / retest date of this product?
1 answer-
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Is this resin capable of separating choline
1 answer-
No references are available for using the hydrogen form of this resin to separate choline from other relevant cations. However, ion-exchange chromatography is suitable for this separation. Reviewing peer-reviewed literature on this topic is recommended. Contact Technical Service for assistance with detailed method development.
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Is this type of resin suitable for separating ammonia gas from air?
1 answer-
This product would not be recommended for separation of ammonia gas from air. Typically, a scrubbing system with a chemical such as dilute sulfuric acid would be used. If an adsorbent is preferred, activated charcoal would be the best recommendation and impregnated activated charcoal is ideal.
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How is shipping temperature determined? And how is it related to the product storage temperature?
1 answer-
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
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What is the particle size and shape of Product 44504?
1 answer-
The mesh size (20-50 mesh) corresponds to a particle size range of approximately 300 to 850 microns. The product is in the form of beads.
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What information do you have on the stability of Dowex® 50W X8 resin, Product 44504?
1 answer-
The ion exchange resin is tolerant of a wide range of chemical conditions, including most inorganic and organic solutions with exception of strong oxidizing agents. Solutions, such as nitric or chromic acid, bleach or chlorine-generating solutions as well as peroxide should be avoided as these will result in rapid oxidation. Exposure of resins to metal ions, such as iron, manganese and copper should be minimized in oxidizing environments as they can catalyze the oxidation.
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What is the matrix for the Dowex® 50W X8 resin, Product 44504?
1 answer-
The fine mesh resin is based on a microporous copolymer of styrene and divinylbenzene (DVB) (styrene-DVB gel).
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What are the proper storage conditions for Dowex® 50W X8 resin, Product 44504?
1 answer-
The resins should be stored in a dry cool place. The storage temperature should be kept below 50oC (120oF).Storage temperature below 0oC can cause resin freezing and temperatures below -18oC (0oF) should be avoided. Repeated freeze-thaw can cause damage on the beads. The frozen resin beads should be completely thawed out at room temperature condition before loading and use.
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What is the suggested operating temperature for Dowex® 50W X8 resin, Product 44504?
1 answer-
At elevated temperature, operation can cause degradation of functional sites and loss of the ion exchange capacity. The resin degradation depends on many variables, such as the level of dissolved oxygen and the presence of catalytic metals on the resin. In general, ~120oC (250oF) is suggested as the maximum operating temperature.
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What is the form of Product 44504, Dowex® 50W X8?
1 answer-
This resin is a strongly acidic cation exchanger, in the H+ ionic form.
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