The CAS Registry Mumber 899447-49-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,9,9,4,4 and 7 respectively; the second part has 2 digits, 4 and 9 respectively. Calculate Digit Verification of CAS Registry Number 899447-49: (8*8)+(7*9)+(6*9)+(5*4)+(4*4)+(3*7)+(2*4)+(1*9)=255 255 % 10 = 5 So 899447-49-5 is a valid CAS Registry Number.
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N-[[(4,6-dichloro-2-pyrimidinyl)amino]thioxomethyl]-5-(4-nitrophenyl)-