31787-86-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 31787-86-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,1,7,8 and 7 respectively; the second part has 2 digits, 8 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 31787-86:
(7*3)+(6*1)+(5*7)+(4*8)+(3*7)+(2*8)+(1*6)=137
137 % 10 = 7
So 31787-86-7 is a valid CAS Registry Number.