1620841-67-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1620841-67-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,2,0,8,4 and 1 respectively; the second part has 2 digits, 6 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1620841-67:
(9*1)+(8*6)+(7*2)+(6*0)+(5*8)+(4*4)+(3*1)+(2*6)+(1*7)=149
149 % 10 = 9
So 1620841-67-9 is a valid CAS Registry Number.