12237-71-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 12237-71-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,2,2,3 and 7 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 12237-71:
(7*1)+(6*2)+(5*2)+(4*3)+(3*7)+(2*7)+(1*1)=77
77 % 10 = 7
So 12237-71-7 is a valid CAS Registry Number.
InChI:InChI=1/C29H21N5O8S2.2Na/c35-28-25-15-12-23(30-29(36)18-4-2-1-3-5-18)16-19(25)17-26(44(40,41)42)27(28)34-33-21-8-6-20(7-9-21)31-32-22-10-13-24(14-11-22)43(37,38)39;;/h1-17,33H,(H,30,36)(H,37,38,39)(H,40,41,42);;/q;2*+1/p-2/b32-31+,34-27-;;