The CAS Registry Mumber 123487-76-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,3,4,8 and 7 respectively; the second part has 2 digits, 7 and 6 respectively. Calculate Digit Verification of CAS Registry Number 123487-76: (8*1)+(7*2)+(6*3)+(5*4)+(4*8)+(3*7)+(2*7)+(1*6)=133 133 % 10 = 3 So 123487-76-3 is a valid CAS Registry Number.
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