The CAS Registry Mumber 1526915-25-2 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 5 respectively. Calculate Digit Verification of CAS Registry Number 1526915-25: (9*1)+(8*5)+(7*2)+(6*6)+(5*9)+(4*1)+(3*5)+(2*2)+(1*5)=172 172 % 10 = 2 So 1526915-25-2 is a valid CAS Registry Number.
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