197787-42-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 197787-42-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,7,7,8 and 7 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 197787-42:
(8*1)+(7*9)+(6*7)+(5*7)+(4*8)+(3*7)+(2*4)+(1*2)=211
211 % 10 = 1
So 197787-42-1 is a valid CAS Registry Number.