5681-94-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 5681-94-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,6,8 and 1 respectively; the second part has 2 digits, 9 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 5681-94:
(6*5)+(5*6)+(4*8)+(3*1)+(2*9)+(1*4)=117
117 % 10 = 7
So 5681-94-7 is a valid CAS Registry Number.