1643949-12-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1643949-12-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,4,3,9,4 and 9 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 1643949-12:
(9*1)+(8*6)+(7*4)+(6*3)+(5*9)+(4*4)+(3*9)+(2*1)+(1*2)=195
195 % 10 = 5
So 1643949-12-5 is a valid CAS Registry Number.