871131-89-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 871131-89-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,7,1,1,3 and 1 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 871131-89:
(8*8)+(7*7)+(6*1)+(5*1)+(4*3)+(3*1)+(2*8)+(1*9)=164
164 % 10 = 4
So 871131-89-4 is a valid CAS Registry Number.