21787-94-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21787-94-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,7,8 and 7 respectively; the second part has 2 digits, 9 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 21787-94:
(7*2)+(6*1)+(5*7)+(4*8)+(3*7)+(2*9)+(1*4)=130
130 % 10 = 0
So 21787-94-0 is a valid CAS Registry Number.