Sulfur mustard. Sulfur mustard, commonly known as mustard gas, is the prototypical substance of the sulfur-based family of cytotoxic and vesicant chemical warfare agents known as the sulfur mustards which have the ability to form large blisters on exposed skin and in the lungs.
Silver jewelry, ornaments, and silverware are traditionally made from Sterling Silver. Sterling Silver is an alloy composed of 92.5% silver and the remainder 7.5% other metals, usually copper. Britannia Silver - Silver that is alloyed with a maximum of 5% other metals.
Quarters and dimes were made out of 90% silver and 10% copper in 1964 and earlier. Nickels are normally made from a nickel alloy. During World War II nickel became crucial to the war effort. In substitute of the nickel alloy the coins were made of 56% copper, 9% manganese and 35% silver.