1217838-39-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1217838-39-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,1,7,8,3 and 8 respectively; the second part has 2 digits, 3 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 1217838-39:
(9*1)+(8*2)+(7*1)+(6*7)+(5*8)+(4*3)+(3*8)+(2*3)+(1*9)=165
165 % 10 = 5
So 1217838-39-5 is a valid CAS Registry Number.