3321-13-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 3321-13-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 3,3,2 and 1 respectively; the second part has 2 digits, 1 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 3321-13:
(6*3)+(5*3)+(4*2)+(3*1)+(2*1)+(1*3)=49
49 % 10 = 9
So 3321-13-9 is a valid CAS Registry Number.
InChI:InChI=1/C20H19N3O12S3.3Na/c1-3-35-15-5-4-12(8-16(15)37(29,30)31)22-23-19-17(38(32,33)34)7-11-6-13(36(26,27)28)9-14(21-10(2)24)18(11)20(19)25;;;/h4-9,22H,3H2,1-2H3,(H,21,24)(H,26,27,28)(H,29,30,31)(H,32,33,34);;;/q;3*+1/p-3/b23-19+;;;