The CAS Registry Mumber 1005130-40-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,0,5,1,3 and 0 respectively; the second part has 2 digits, 4 and 0 respectively. Calculate Digit Verification of CAS Registry Number 1005130-40: (9*1)+(8*0)+(7*0)+(6*5)+(5*1)+(4*3)+(3*0)+(2*4)+(1*0)=64 64 % 10 = 4 So 1005130-40-4 is a valid CAS Registry Number.
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