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
217506
AmberChrom™ 50WX8 Ion Exchange Resin
hydrogen form, 100-200 mesh
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Product Name
Dowex 50WX8 hydrogen form, hydrogen form, 100-200 mesh
descripción
cross-linkage 8%
Nivel de calidad
Formulario
beads
humedad
50-58%
técnicas
LPLC: suitable
Matriz
styrene-divinylbenzene (gel)
grupo activo de la matriz
sulfonic acid functional group
tamaño de partícula
100-200 mesh
capacidad
1.7 meq/mL by wetted bed volume
técnica de separación
cation exchange
cadena SMILES
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
Clave InChI
NWUYHJFMYQTDRP-UHFFFAOYSA-N
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Este artículo | 217492 | 217514 | 422096 |
|---|---|---|---|
| matrix styrene-divinylbenzene (gel) | matrix styrene-divinylbenzene (gel) | matrix styrene-divinylbenzene (gel) | matrix styrene-divinylbenzene (gel) |
| separation technique cation exchange | separation technique cation exchange | separation technique cation exchange | separation technique cation exchange |
| matrix active group sulfonic acid functional group | matrix active group sulfonic acid functional group | matrix active group sulfonic acid functional group | matrix active group sulfonic acid functional group |
| particle size 100-200 mesh | particle size 50-100 mesh | particle size 200-400 mesh | particle size 100-200 mesh |
| form beads | form beads | form beads | form beads |
| capacity 1.7 meq/mL by wetted bed volume | capacity 1.7 meq/mL by wetted bed volume | capacity 1.7 meq/mL by wetted bed volume | capacity 1.1 meq/mL by wetted bed volume |
Descripción general
Aplicación
Otras notas
Información legal
Palabra de señalización
Warning
Frases de peligro
Consejos de prudencia
Clasificaciones de peligro
Eye Irrit. 2
Código de clase de almacenamiento
13 - Non Combustible Solids
Clase de riesgo para el agua (WGK)
WGK 3
Punto de inflamabilidad (°F)
Not applicable
Punto de inflamabilidad (°C)
Not applicable
Equipo de protección personal
dust mask type N95 (US), Eyeshields, Gloves
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Certificados de análisis (COA)
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How can I determine the shelf life / expiration / retest date of this product?
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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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How can a Dowex 1x4 resin in the chloride form be converted to the acidic form?
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This product is a strongly acidic cation exchange resin in the H+ form. There is no way to convert between this and being in the chloride form, which would constitute an anion exchange resin. A resin cannot be converted from an anion exchange resin to a cation exchange resin, or vice versa. A resin in the H+ form can, however, be converted to the sodium form by flushing with two volumes of 1 N NaOH, whereby the sodium ions take the place of the hydrogen.
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What is the meaning of 1.7 meq/mL by wetted bed volume for this resin? Do we have to consider the molecular mass of resin or the reaction mixture that we are going to purify?
1 answer-
A milliequivalent is one-thousandth of an equivalent. The unit mEq is related to the number (mmol) and electrical charge of ions in solution. 1.7 mEq/mL means 1.7 millimoles of charge per milliliter of resin bed.
Yes, you will need to consider the milliequivalents of charge on the resin and the millimoles of the material that you are trying to purify; make sure that the first is greater.
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How can I convert a cation exchange resin from the hydrogen form to the sodium form?
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To convert a cation exhcange resin from the hydrogen form to the sodium form, use two to four bed volumes of 0.5-2.0% NaCl or NaOH.
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What is the particle size of Product 217506, Dowex® 50WX8 - hydrogen form, 100-200 mesh resin?
1 answer-
This is Dowex 50Wx8 100-200 mesh, with beads measuring 75-150 microns. This particle size is consistent in water, but the resin will shrink when exchanged to other cationic forms, and it will swell when exposed to organic solvents. You may test the swelling characteristics of a resin to be used in your application by doing the initial solvent exchanges in a graduated cylinder.
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How do I prepare Product 217506, Dowex® 50WX8 - hydrogen form, 100-200 mesh resin, for use?
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Cation exchange resins can be prepared by initially swirling with deionized water in a flask (no stir bars, please), allowing them to settle for 15-20 minutes, and decanting the fines. To fully activate the resin, repeat the procedure 2-3 times with 2N hydrochloric or sulfuric acid, and rinse with copious amounts of water until >pH 5; this procedure may be completed with use of a Büchner funnel.
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What is the Department of Transportation shipping information for this product?
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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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Is Product 217506, Dowex® 50WX8 - hydrogen form, 100-200 mesh resin, the same as AG50W-X8?
1 answer-
The AG® designation indicates that a resin has been specially cleaned and certified for analytical use. In most cases, resin that you prepare yourself will be suitable for your application. (® Bio-Rad Laboratories, Hercules,CA)
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