6990-77-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 6990-77-8 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,9,9 and 0 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 6990-77:
(6*6)+(5*9)+(4*9)+(3*0)+(2*7)+(1*7)=138
138 % 10 = 8
So 6990-77-8 is a valid CAS Registry Number.