156996-22-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 156996-22-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,6,9,9 and 6 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 156996-22:
(8*1)+(7*5)+(6*6)+(5*9)+(4*9)+(3*6)+(2*2)+(1*2)=184
184 % 10 = 4
So 156996-22-4 is a valid CAS Registry Number.