667907-56-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 667907-56-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,7,9,0 and 7 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 667907-56:
(8*6)+(7*6)+(6*7)+(5*9)+(4*0)+(3*7)+(2*5)+(1*6)=214
214 % 10 = 4
So 667907-56-4 is a valid CAS Registry Number.