6647-34-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 6647-34-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,6,4 and 7 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 6647-34:
(6*6)+(5*6)+(4*4)+(3*7)+(2*3)+(1*4)=113
113 % 10 = 3
So 6647-34-3 is a valid CAS Registry Number.
InChI:InChI=1/C21H20N4O4/c1-24(2)8-5-9-25-20(28)14-15(21(25)29)17(23)13-12(16(14)22)18(26)10-6-3-4-7-11(10)19(13)27/h3-4,6-7H,5,8-9,22-23H2,1-2H3
6647-34-3Relevant articles and documents
Dyestuffs and Hair Dye Compositions
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Page/Page column 13, (2008/06/13)
The present invention refers to dyestuffs of the general formula (I) wherein R, R1, X, Y, Z, T and A- are defined as given in claim 1, dyestuff mixtures and hair dye compositions comprising them, as well as a process for colouring ha