91-91-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 91-91-8 includes 5 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 2 digits, 9 and 1 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 91-91:
(4*9)+(3*1)+(2*9)+(1*1)=58
58 % 10 = 8
So 91-91-8 is a valid CAS Registry Number.
InChI:InChI=1/C14H12N4O2.4ClH.H2O4S.2Zn/c1-19-13-7-9(3-5-11(13)17-15)10-4-6-12(18-16)14(8-10)20-2;;;;;1-5(2,3)4;;/h3-8H,1-2H3;4*1H;(H2,1,2,3,4);;/q+2;;;;;;2*+2/p-6/rC14H12N4O2.4ClH.O4SZn.Zn/c1-19-13-7-9(3-5-11(13)17-15)10-4-6-12(18-16)14(8-10)20-2;;;;;1-5(2)3-6-4-5;/h3-8H,1-2H3;4*1H;;/q+2;;;;;;+2/p-4