The CAS Registry Mumber 75303-37-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,5,3,0 and 3 respectively; the second part has 2 digits, 3 and 7 respectively. Calculate Digit Verification of CAS Registry Number 75303-37: (7*7)+(6*5)+(5*3)+(4*0)+(3*3)+(2*3)+(1*7)=116 116 % 10 = 6 So 75303-37-6 is a valid CAS Registry Number.
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