The CAS Registry Mumber 90052-70-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,0,0,5 and 2 respectively; the second part has 2 digits, 7 and 0 respectively. Calculate Digit Verification of CAS Registry Number 90052-70: (7*9)+(6*0)+(5*0)+(4*5)+(3*2)+(2*7)+(1*0)=103 103 % 10 = 3 So 90052-70-3 is a valid CAS Registry Number.
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