The CAS Registry Mumber 123919-79-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,3,9,1 and 9 respectively; the second part has 2 digits, 7 and 9 respectively. Calculate Digit Verification of CAS Registry Number 123919-79: (8*1)+(7*2)+(6*3)+(5*9)+(4*1)+(3*9)+(2*7)+(1*9)=139 139 % 10 = 9 So 123919-79-9 is a valid CAS Registry Number.
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Get Best Price for123919-79-9D-ribo-Hexonic acid, 4-O-(cyclohexylmethyl)-3-deoxy-6-O-(1,1-dimethylethyl)dimethylsilyl-2-O-methyl-, .delta.-lactone