含有

1. Origins, structure, and basic meaning

• Structure: The technical noun and する verb 含有 (がんゆう) means containing a particular component within a substance.
• Basic usage: A food can 鉄分を含有している, and the amount contained is named with the compound 含有量.

2. Common pitfalls and similar expressions

• Containing a component
  • It suits technical statements of composition and amount more than a casual statement that something is inside.