The CAS Registry Mumber 78371-07-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,8,3,7 and 1 respectively; the second part has 2 digits, 0 and 7 respectively. Calculate Digit Verification of CAS Registry Number 78371-07: (7*7)+(6*8)+(5*3)+(4*7)+(3*1)+(2*0)+(1*7)=150 150 % 10 = 0 So 78371-07-0 is a valid CAS Registry Number.
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