The CAS Registry Mumber 1053951-49-7 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,5,3,9,5 and 1 respectively; the second part has 2 digits, 4 and 9 respectively. Calculate Digit Verification of CAS Registry Number 1053951-49: (9*1)+(8*0)+(7*5)+(6*3)+(5*9)+(4*5)+(3*1)+(2*4)+(1*9)=147 147 % 10 = 7 So 1053951-49-7 is a valid CAS Registry Number.
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