On June 29,2015,the Chemical Abstracts Service（CAS）,the world’s authority for chemical information,registered the 100millionth chemical substance in the CAS REGISTRY,the world’s largest database of unique chemical...On June 29,2015,the Chemical Abstracts Service（CAS）,the world’s authority for chemical information,registered the 100millionth chemical substance in the CAS REGISTRY,the world’s largest database of unique chemical substances（http：//www.cas.org/news/media-releases/100-millionthsubstance）.There are different estimates of the number of chemicals in commercial use.Depending on the source,that number could range from around 8,000（counting only those展开更多
文摘On June 29,2015,the Chemical Abstracts Service（CAS）,the world’s authority for chemical information,registered the 100millionth chemical substance in the CAS REGISTRY,the world’s largest database of unique chemical substances（http：//www.cas.org/news/media-releases/100-millionthsubstance）.There are different estimates of the number of chemicals in commercial use.Depending on the source,that number could range from around 8,000（counting only those
