The CAS Registry Mumber 1370477-99-8 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,3,7,0,4,7 and 7 respectively; the second part has 2 digits, 9 and 9 respectively. Calculate Digit Verification of CAS Registry Number 1370477-99: (9*1)+(8*3)+(7*7)+(6*0)+(5*4)+(4*7)+(3*7)+(2*9)+(1*9)=178 178 % 10 = 8 So 1370477-99-8 is a valid CAS Registry Number.
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