121788-40-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 121788-40-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,1,7,8 and 8 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 121788-40:
(8*1)+(7*2)+(6*1)+(5*7)+(4*8)+(3*8)+(2*4)+(1*0)=127
127 % 10 = 7
So 121788-40-7 is a valid CAS Registry Number.