火狐体育

CAS號定義

        casquanchengweichemical abstracts service,jimeiguohuaxuehuidexiashezuzhihuaxuewenzhaishe。gaishefuzeweimeiyizhongchuxianzaiwenxianzhongdewuzhifenpeiyigecashao,zheshiweilebimianhuaxuewuzhiyouduozhongmingchengdemafan,shishujukudejiansuogengweifangbian。

CAS號驗證原則

        cashaobixufuhexiangyingdeguize,keyitongguoxiaoyanmapanduanzijidecashaoshifouzhengque。yigecashaoyilianzifu“-”fenweisanbufen,diyibufenyou2dao6weishuzi,dierbufenyou2weishuzi,disanbufenyou1weishuzizuoweixiaoyanma。xiaoyanmadejisuanfangfaruxia:casshunxuhao(diyi、erbufenshuzi)dezuihouyiweichengyi1,zuihoudierweichengyi2,yicileitui,ranhouzaibasuoyoudechengjixiangjia,zaibahechuyi10,qiyushujiushidisanbufendexiaoyanma。julilaishuo,h2o decashaoqianliangbufenshi7732-18,zeqixiaoyanma= ( 8×1 + 1×2 + 2×3 + 3×4 + 7×5 + 7×6 ) mod 10 = 105 mod 10 = 5(modweiqiuyuyunsuanfu),suoyishuidecaswei7732-18-5。

CAS號適用的范圍

        zaishijimaoyihuozheduoguohuaxuepindengji(oumengreachzhuce、ribencsclshenbao、meiguotscashenbao、zhongguoxinhuaxuewuzhidengjideng)guochengzhong,douxuyaotigongwuzhidecashao。ruguoqiyeyanfalezuixindewuzhi,wangwangwufatongguochazhaodeshouduanhuoqucashao,zhinengxiangmeiguohuaxuehuishenqingcashao,yibiangeiwuzhiyigeweiyideshibiema。

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