The CAS Registry Mumber 637337-95-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,3,7,3,3 and 7 respectively; the second part has 2 digits, 9 and 5 respectively. Calculate Digit Verification of CAS Registry Number 637337-95: (8*6)+(7*3)+(6*7)+(5*3)+(4*3)+(3*7)+(2*9)+(1*5)=182 182 % 10 = 2 So 637337-95-2 is a valid CAS Registry Number.
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