The CAS Registry Mumber 211293-78-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,1,2,9 and 3 respectively; the second part has 2 digits, 7 and 8 respectively. Calculate Digit Verification of CAS Registry Number 211293-78: (8*2)+(7*1)+(6*1)+(5*2)+(4*9)+(3*3)+(2*7)+(1*8)=106 106 % 10 = 6 So 211293-78-6 is a valid CAS Registry Number.
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