191615-51-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 191615-51-7 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, 5 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 191615-51:
(8*1)+(7*9)+(6*1)+(5*6)+(4*1)+(3*5)+(2*5)+(1*1)=137
137 % 10 = 7
So 191615-51-7 is a valid CAS Registry Number.