78643-31-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 78643-31-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,8,6,4 and 3 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 78643-31:
(7*7)+(6*8)+(5*6)+(4*4)+(3*3)+(2*3)+(1*1)=159
159 % 10 = 9
So 78643-31-9 is a valid CAS Registry Number.