66338-16-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 66338-16-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,6,3,3 and 8 respectively; the second part has 2 digits, 1 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 66338-16:
(7*6)+(6*6)+(5*3)+(4*3)+(3*8)+(2*1)+(1*6)=137
137 % 10 = 7
So 66338-16-7 is a valid CAS Registry Number.