1621135-55-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1621135-55-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,2,1,1,3 and 5 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 1621135-55:
(9*1)+(8*6)+(7*2)+(6*1)+(5*1)+(4*3)+(3*5)+(2*5)+(1*5)=124
124 % 10 = 4
So 1621135-55-4 is a valid CAS Registry Number.