The CAS Registry Mumber 72987-48-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,2,9,8 and 7 respectively; the second part has 2 digits, 4 and 8 respectively. Calculate Digit Verification of CAS Registry Number 72987-48: (7*7)+(6*2)+(5*9)+(4*8)+(3*7)+(2*4)+(1*8)=175 175 % 10 = 5 So 72987-48-5 is a valid CAS Registry Number.
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Get Best Price for72987-48-52-Naphthalenesulfonic acid, 7,7'-(carbonyldiimino)bis[ 4-hydroxy-3-(phenylazo)-, compd. with α,α',α''- (nitrilotri-2,1-ethanediyl)tris[ω-hydroxypoly (oxy-1,2-ethanediyl)] (1:2)