21221-01-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21221-01-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,2,2 and 1 respectively; the second part has 2 digits, 0 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 21221-01:
(7*2)+(6*1)+(5*2)+(4*2)+(3*1)+(2*0)+(1*1)=42
42 % 10 = 2
So 21221-01-2 is a valid CAS Registry Number.
InChI:InChI=1/C17H21NO4S2/c19-24(20,21)23-14-12-18-11-13-22-17(15-7-3-1-4-8-15)16-9-5-2-6-10-16/h1-10,17-18H,11-14H2,(H,19,20,21)