The CAS Registry Mumber 358979-86-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,5,8,9,7 and 9 respectively; the second part has 2 digits, 8 and 6 respectively. Calculate Digit Verification of CAS Registry Number 358979-86: (8*3)+(7*5)+(6*8)+(5*9)+(4*7)+(3*9)+(2*8)+(1*6)=229 229 % 10 = 9 So 358979-86-9 is a valid CAS Registry Number.
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