The CAS Registry Mumber 140212-97-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,0,2,1 and 2 respectively; the second part has 2 digits, 9 and 7 respectively. Calculate Digit Verification of CAS Registry Number 140212-97: (8*1)+(7*4)+(6*0)+(5*2)+(4*1)+(3*2)+(2*9)+(1*7)=81 81 % 10 = 1 So 140212-97-1 is a valid CAS Registry Number.
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3,3',3''-phosphinylidynetris[2,3-dihydro-2-oxo-, trisodium salt