551-91-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 551-91-7 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 5,5 and 1 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 551-91:
(5*5)+(4*5)+(3*1)+(2*9)+(1*1)=67
67 % 10 = 7
So 551-91-7 is a valid CAS Registry Number.
InChI:InChI=1/C6H6N2O5S/c7-4-1-2-5(8(9)10)6(3-4)14(11,12)13/h1-3H,7H2,(H,11,12,13)
551-91-7Relevant articles and documents
DISAZO COMPOUNDS AND THEIR USE IN INK-JET PRINTING
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Page/Page column 20, (2010/04/28)
A compound of Formula (1) or asalt thereof: wherein: X is N or C(CN); Z is optionally substituted naphthyl;and Ar is an aryl group carrying at least one nitro substituentand optionally one or more further substituents. Also compositions, inks, printing processes, printed material and ink-jet cartridges.