The CAS Registry Mumber 1241970-74-0 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, 7 and 4 respectively. Calculate Digit Verification of CAS Registry Number 1241970-74: (9*1)+(8*2)+(7*4)+(6*1)+(5*9)+(4*7)+(3*0)+(2*7)+(1*4)=150 150 % 10 = 0 So 1241970-74-0 is a valid CAS Registry Number.
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