1561771-86-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1561771-86-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,5,6,1,7,7 and 1 respectively; the second part has 2 digits, 8 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 1561771-86:
(9*1)+(8*5)+(7*6)+(6*1)+(5*7)+(4*7)+(3*1)+(2*8)+(1*6)=185
185 % 10 = 5
So 1561771-86-5 is a valid CAS Registry Number.