The CAS Registry Mumber 93418-61-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,3,4,1 and 8 respectively; the second part has 2 digits, 6 and 1 respectively. Calculate Digit Verification of CAS Registry Number 93418-61: (7*9)+(6*3)+(5*4)+(4*1)+(3*8)+(2*6)+(1*1)=142 142 % 10 = 2 So 93418-61-2 is a valid CAS Registry Number.
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2,2'-[[9-[[(3,4,5-trimethoxyphenyl)methylene]hydrazono]-9H-fluorene-2,7
-diyl]bis(oxy)]bis[N,N-diethyl-N-methyl-, diiodide