156899-17-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 156899-17-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,6,8,9 and 9 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 156899-17:
(8*1)+(7*5)+(6*6)+(5*8)+(4*9)+(3*9)+(2*1)+(1*7)=191
191 % 10 = 1
So 156899-17-1 is a valid CAS Registry Number.