AmberChrom^™ 50W X8 Ion Exchange Resin

This product removes sodium but also removes mercury, making it unsuitable for the stated ICP application (20 ng/L Hg in a 2 g/L NaCl solution without dilution).

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

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.

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.

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

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.

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.

This resin is a strongly acidic cation exchanger, in the H+ ionic form.

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.

Pro analysi (per analysis, or p.a.) grade chemicals are tested to similar - although not identical - standards as are ACS reagents. P.a. grade material are suitable for many routine laboratory applications.