1638487-42-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1638487-42-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,3,8,4,8 and 7 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 1638487-42:
(9*1)+(8*6)+(7*3)+(6*8)+(5*4)+(4*8)+(3*7)+(2*4)+(1*2)=209
209 % 10 = 9
So 1638487-42-9 is a valid CAS Registry Number.