Though it is commonly believed that Copper Beryllium alloys are safe to handle, evidence suggests this is not true. There are many factors that make copper beryllium dangerous such as corrosion, microscopic amounts of dust on the copper beryllium that can enter through open pores or cuts and product specific problems, such as shaving from a copper beryllium tool slipping and causing exposure to beryllium particles that can be breathed in. OSHA has recently reduced exposure limits to beryllium to 0.2ug/m3.
Here is a study in the Chest Journal outlining a case study of two women who developed Chronic Beryllium Disease from just handling Copper Beryllium products. https://journal.chestnet.org/article/S0012-3692(15)38252-0/fulltext#cesec10
Apple, the tech giant, has removed all Beryllium including Copper Beryllium. https://www.apple.com/environment/safer-materials/
Here is a study in the Chest Journal outlining a case study of two women who developed Chronic Beryllium Disease from just handling Copper Beryllium products. https://journal.chestnet.org/article/S0012-3692(15)38252-0/fulltext#cesec10
Apple, the tech giant, has removed all Beryllium including Copper Beryllium. https://www.apple.com/environment/safer-materials/