131900-31-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 131900-31-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,1,9,0 and 0 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 131900-31:
(8*1)+(7*3)+(6*1)+(5*9)+(4*0)+(3*0)+(2*3)+(1*1)=87
87 % 10 = 7
So 131900-31-7 is a valid CAS Registry Number.