721927-55-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 721927-55-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 7,2,1,9,2 and 7 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 721927-55:
(8*7)+(7*2)+(6*1)+(5*9)+(4*2)+(3*7)+(2*5)+(1*5)=165
165 % 10 = 5
So 721927-55-5 is a valid CAS Registry Number.