The CAS Registry Mumber 1258637-47-6 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,5,8,6,3 and 7 respectively; the second part has 2 digits, 4 and 7 respectively. Calculate Digit Verification of CAS Registry Number 1258637-47: (9*1)+(8*2)+(7*5)+(6*8)+(5*6)+(4*3)+(3*7)+(2*4)+(1*7)=186 186 % 10 = 6 So 1258637-47-6 is a valid CAS Registry Number.
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