The CAS Registry Mumber 1071700-39-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,7,1,7,0 and 0 respectively; the second part has 2 digits, 3 and 9 respectively. Calculate Digit Verification of CAS Registry Number 1071700-39: (9*1)+(8*0)+(7*7)+(6*1)+(5*7)+(4*0)+(3*0)+(2*3)+(1*9)=114 114 % 10 = 4 So 1071700-39-4 is a valid CAS Registry Number.
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