The CAS Registry Mumber 1241970-22-8 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,4,1,9,7 and 0 respectively; the second part has 2 digits, 2 and 2 respectively. Calculate Digit Verification of CAS Registry Number 1241970-22: (9*1)+(8*2)+(7*4)+(6*1)+(5*9)+(4*7)+(3*0)+(2*2)+(1*2)=138 138 % 10 = 8 So 1241970-22-8 is a valid CAS Registry Number.
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