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.
1 Fine silver has a millesimal fineness of 999. 2  Also called pure silver, or three nines fine, fine silver contains 99.9% silver, with the balance being trace amounts of impurities. 3  This grade of silver is used to make bullion bars for international commodities trading and investment in silver. Coin silver has a millesimal fineness of 900. 2  The term coin silver was derived from the fact that much of it was made from melting down silver coins. 3  It is important here to note that there are differences between the coin silver standard and the coin silver alloy, as actually used in making silver objects.