The CAS Registry Mumber 95037-87-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,5,0,3 and 7 respectively; the second part has 2 digits, 8 and 7 respectively. Calculate Digit Verification of CAS Registry Number 95037-87: (7*9)+(6*5)+(5*0)+(4*3)+(3*7)+(2*8)+(1*7)=149 149 % 10 = 9 So 95037-87-9 is a valid CAS Registry Number.