1780-98-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1780-98-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,7,8 and 0 respectively; the second part has 2 digits, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 1780-98:
(6*1)+(5*7)+(4*8)+(3*0)+(2*9)+(1*8)=99
99 % 10 = 9
So 1780-98-9 is a valid CAS Registry Number.