Is 50-50 solder legal in US?

Yes, 50-50 solder, which typically contains equal parts of lead and tin, is legal in the U.S. for certain applications. However, due to health concerns associated with lead exposure, its use is restricted in some contexts, particularly in consumer electronics and Plumbing. Manufacturers must comply with regulations like the Environmental Protection Agency (EPA) and the Safe Drinking Water Act, which limit lead content in products. Always check local regulations for specific applications.