642996-64-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 642996-64-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,4,2,9,9 and 6 respectively; the second part has 2 digits, 6 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 642996-64:
(8*6)+(7*4)+(6*2)+(5*9)+(4*9)+(3*6)+(2*6)+(1*4)=203
203 % 10 = 3
So 642996-64-3 is a valid CAS Registry Number.