The CAS Registry Mumber 70527-89-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,0,5,2 and 7 respectively; the second part has 2 digits, 8 and 9 respectively. Calculate Digit Verification of CAS Registry Number 70527-89: (7*7)+(6*0)+(5*5)+(4*2)+(3*7)+(2*8)+(1*9)=128 128 % 10 = 8 So 70527-89-8 is a valid CAS Registry Number.
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