The use of ionizing radiation is an indispensable part of modern medical treatment. The use of radiation shielding apparel for the personnel in charge of these instruments is mandatory. For a long time, lead (Pb) was the go-to element. However, environmental concerns and the heavy weight of lead have prompted the search for alternatives. Antimony powder (Sb), bismuth powder (Bi), and their oxides have found widespread use due to their radiation high shielding performance.

Recent Chinese export restrictions on bismuth and antimony products have led to a significant increase in the prices of these raw materials. Prices for bismuth and antimony have multiplied in recent weeks, seriously impacting supply chains. As a result, alternatives are being revisited, bringing tin powder (Sn) and tin oxide (SnO₂) back into focus. While the radiation shielding performance of tin powder or tin oxide is not as good as bismuth, it is comparable to antimony-based products, as shown by data from the NIST database.

Keeling & Walker offers cost-effective alternatives to expensive bismuth and antimony with their Superlite Tin Oxide and Black Tin Powder, providing comparable protection.  For direct incorporation into polymers a Tin Oxide Master batch Irasorb MB620 is available.