157722-55-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 157722-55-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,7,7,2 and 2 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 157722-55:
(8*1)+(7*5)+(6*7)+(5*7)+(4*2)+(3*2)+(2*5)+(1*5)=149
149 % 10 = 9
So 157722-55-9 is a valid CAS Registry Number.