1640995-61-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1640995-61-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,4,0,9,9 and 5 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1640995-61:
(9*1)+(8*6)+(7*4)+(6*0)+(5*9)+(4*9)+(3*5)+(2*6)+(1*1)=194
194 % 10 = 4
So 1640995-61-4 is a valid CAS Registry Number.