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.
Until 2012 'silver' UK coins, (5p, 10p, 20p and 50p) were made from  an alloy called Cupro-nickel-typically 75% copper, 25% nickel and  a trace amount of Manganese.   â¦  Since 2012 these coins have been made of plated steel to reduce  manufacturing costs.