The CAS Registry Mumber 65910-37-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,5,9,1 and 0 respectively; the second part has 2 digits, 3 and 7 respectively. Calculate Digit Verification of CAS Registry Number 65910-37: (7*6)+(6*5)+(5*9)+(4*1)+(3*0)+(2*3)+(1*7)=134 134 % 10 = 4 So 65910-37-4 is a valid CAS Registry Number.
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