6977-67-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 6977-67-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,9,7 and 7 respectively; the second part has 2 digits, 6 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 6977-67:
(6*6)+(5*9)+(4*7)+(3*7)+(2*6)+(1*7)=149
149 % 10 = 9
So 6977-67-9 is a valid CAS Registry Number.