1237789-81-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1237789-81-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,3,7,7,8 and 9 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1237789-81:
(9*1)+(8*2)+(7*3)+(6*7)+(5*7)+(4*8)+(3*9)+(2*8)+(1*1)=199
199 % 10 = 9
So 1237789-81-9 is a valid CAS Registry Number.