72121-81-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 72121-81-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,2,1,2 and 1 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 72121-81:
(7*7)+(6*2)+(5*1)+(4*2)+(3*1)+(2*8)+(1*1)=94
94 % 10 = 4
So 72121-81-4 is a valid CAS Registry Number.
InChI:InChI=1/C19H20N4O11S3.2Na/c1-12-18(19(24)23(22-12)14-4-6-15(7-5-14)36(27,28)29)21-20-13-3-8-16(33-2)17(11-13)35(25,26)10-9-34-37(30,31)32;;/h3-8,11,18H,9-10H2,1-2H3,(H,27,28,29)(H,30,31,32);;/q;2*+1/p-2/b21-20+;;