871656-88-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 871656-88-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,7,1,6,5 and 6 respectively; the second part has 2 digits, 8 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 871656-88:
(8*8)+(7*7)+(6*1)+(5*6)+(4*5)+(3*6)+(2*8)+(1*8)=211
211 % 10 = 1
So 871656-88-1 is a valid CAS Registry Number.