The CAS Registry Mumber 1526915-22-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,5,2,6,9,1 and 5 respectively; the second part has 2 digits, 2 and 2 respectively. Calculate Digit Verification of CAS Registry Number 1526915-22: (9*1)+(8*5)+(7*2)+(6*6)+(5*9)+(4*1)+(3*5)+(2*2)+(1*2)=169 169 % 10 = 9 So 1526915-22-9 is a valid CAS Registry Number.
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