The CAS Registry Mumber 194925-87-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,4,9,2 and 5 respectively; the second part has 2 digits, 8 and 7 respectively. Calculate Digit Verification of CAS Registry Number 194925-87: (8*1)+(7*9)+(6*4)+(5*9)+(4*2)+(3*5)+(2*8)+(1*7)=186 186 % 10 = 6 So 194925-87-6 is a valid CAS Registry Number.
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