Nzoomed
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- Mar 30, 2012
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Thats fine thanks.Cyan dyes are usually Napthol or Phenol derivatives. Magentas are usually Parazolone derivatives, and Yellows are usually Pivaloyl or Phenyl acetoyl derivatives. None of these form Azo dyes which are N=N dyes. These form Azo Methine dyes which are N=C dyes.
I don't know the CAS numbers.
PE
Looks like the couplers in the patent are definitely correct then.
The whole idea about Azo dyes was what I read in some blog about Kodachrome, supposedly claiming thats why Kodachrome was so archival.
I dont think there are any CAS numbers for the couplers. They would have been documented in the patents if so, and by the looks only Kodak, would likely have ever made these compounds.
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