CAS DataBase Reference:meso-2c,2'c'-bis-(4-acetoxy-phenyl)-1,7,1',7'-tetraphenyl-(3rC4,1ξH,3'r'C4',1'ξH)-bi[5-oxa-6-aza-spiro[2.4]heptyl]-6,6'-diene-4,4'-dione(CAS DataBase Reference)
The CAS Registry Mumber 50780-03-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,0,7,8 and 0 respectively; the second part has 2 digits, 0 and 3 respectively. Calculate Digit Verification of CAS Registry Number 50780-03: (7*5)+(6*0)+(5*7)+(4*8)+(3*0)+(2*0)+(1*3)=105 105 % 10 = 5 So 50780-03-5 is a valid CAS Registry Number.
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