191615-77-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 191615-77-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,1,6,1 and 5 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 191615-77:
(8*1)+(7*9)+(6*1)+(5*6)+(4*1)+(3*5)+(2*7)+(1*7)=147
147 % 10 = 7
So 191615-77-7 is a valid CAS Registry Number.