The CAS Registry Mumber 225787-03-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,5,7,8 and 7 respectively; the second part has 2 digits, 0 and 3 respectively. Calculate Digit Verification of CAS Registry Number 225787-03: (8*2)+(7*2)+(6*5)+(5*7)+(4*8)+(3*7)+(2*0)+(1*3)=151 151 % 10 = 1 So 225787-03-1 is a valid CAS Registry Number.
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