7641-11-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 7641-11-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,6,4 and 1 respectively; the second part has 2 digits, 1 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 7641-11:
(6*7)+(5*6)+(4*4)+(3*1)+(2*1)+(1*1)=94
94 % 10 = 4
So 7641-11-4 is a valid CAS Registry Number.