The CAS Registry Mumber 372112-40-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,7,2,1,1 and 2 respectively; the second part has 2 digits, 4 and 0 respectively. Calculate Digit Verification of CAS Registry Number 372112-40: (8*3)+(7*7)+(6*2)+(5*1)+(4*1)+(3*2)+(2*4)+(1*0)=108 108 % 10 = 8 So 372112-40-8 is a valid CAS Registry Number.
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