1040687-81-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1040687-81-7 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,4,0,6,8 and 7 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1040687-81:
(9*1)+(8*0)+(7*4)+(6*0)+(5*6)+(4*8)+(3*7)+(2*8)+(1*1)=137
137 % 10 = 7
So 1040687-81-7 is a valid CAS Registry Number.