17781-82-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 17781-82-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,7,7,8 and 1 respectively; the second part has 2 digits, 8 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 17781-82:
(7*1)+(6*7)+(5*7)+(4*8)+(3*1)+(2*8)+(1*2)=137
137 % 10 = 7
So 17781-82-7 is a valid CAS Registry Number.