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.
Silver dimes and quarters were minted from 1796 to 1964. Most of them were made of 90% silver and 10% copper. For other denominations, halves were silver from 1794 to 1970, bâ¦ut those dated 1965-1970 were made of 40% silver, not 90% silver. Silver dollars were made of 90% silver up till 1935.