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Cryptocyanine, Kryptocyanine PE's List Fourth dye
 CB4433150
Chemical Name: CRYPTOCYANINE
Molecular Formula: C25H25IN2
Formula Weight: 480.38
CAS No.: 4727-50-8
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China
Company Name: J & K SCIENTIFIC LTD. Recommend Complaint
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Products Intro: Product Name:Cryptocyanine
CAS:4727-50-8
Purity:98.0%(T) Package:1G More...
CB Index: 76
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Products Intro: Product Name:Cryptocyanine
CAS:4727-50-8
Purity:>98.0%(T) Remarks:C0426 More...
CB Index: 62
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Products Intro: Product Name:Cryptocyanine
CAS:4727-50-8
Purity:98.0%(LC) Package:1G More...
CB Index: 81
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Products Intro: Product Name:1,1'-DIETHYL-4,4'-CARBOCYANINE IODIDE
CAS:4727-50-8
Purity:98% Package:1g;10g;100g;500g;25kg More...
CB Index: 61
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Products Intro:
CB Index: 60
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Products Intro: Purity:99% Package:1GR
CB Index: 81
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Products Intro: Product Name:1,1'-Diethyl-4,4'-carbocyanine iodide
CAS:4727-50-8
Remarks:ST01380
CB Index: 65
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CB Index: 42
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Products Intro:
CB Index: 30
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Products Intro:
CB Index: 91
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Products Intro:
CB Index: 72
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CB Index: 47
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CB Index: 71
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Nationality: Europe
Products Intro:
CB Index: 66
WebSite: www.ecochem.dk
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Oh, just try Tennessee Eastman. I believe that they sell some of these.
PE
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6,6 diethoxy 1,1 diethyl 2,4 dimethyl 2,4 carbocyanine iodide
PE , What is the molecular formula of 6,6 diethoxy 1,1 diethyl 2,4 dimethyl 2,4 carbocyanine iodide ?
Umut
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PE ,
Here are the 5 dyes from your list from first to fifth.
Are they enough to solve rgb sensitization or do I need to continue ?
Umut
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 Originally Posted by Mustafa Umut Sarac
PE , What is the molecular formula of 6,6 diethoxy 1,1 diethyl 2,4 dimethyl 2,4 carbocyanine iodide ?
Umut
Umut;
It would take me a while to work out the structure, and I doubt if it would do anyone any good.
As for providing R/G/B sensitivity, we do have dyes already posted here that do the trick and so I have no concern about it being a problem. Except for the cost, these dyes are available.
Now, as to their working, some dyes work and some do not on any given emulson. I have 5 or 6 dyes that I tried and got 2 that work on all emulsions, but one is weak and the other sensitizes at a long green wavelength. Another one only works well on bromide emulsions as a green but works on bromo / iodide emulsions as either a red or green. This dye has been the subject of much discussion here.
So, I cannot answer your question about "solving the problem" until I did an experiment with at least 3 emulsions with each dye. You can see how time consuming and expensive that will be. I've already done the ones about, 6 or 7 dyes with 3 emulsions and have published the good results either here or in the book.
PE
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Originally Posted by Mustafa Umut Sarac
CB4433150
Chemical Name: CRYPTOCYANINE
Molecular Formula: C25H25IN2
Formula Weight: 480.38
CAS No.: 4727-50-8 ....
Ok, here we go, a proof of concept... $52/gram, minimum order of $100.
http://chemicals.citychemical.com/it...origin=keyword
Now, of course there's a lot more to consider here, like Ron says, but with a little effort and creativity I think we can find sensitizers that won't break the bank, hopefully one that does a good job with red.
Umut, awesome job. However, is it necessary to copy and paste all of that?! 
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PE, Chris and all ,
I attached links to check prices in China and compare with others. Chris , orepare a email template send it to Chinese companies with list attached. They will never lost your e mail address and you will recieve every week a mail starting with Hello Freind not Friend in next 3 years whick makes you want to raze his triangle beard under his jaw , chin  )
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I got some cryptocyanine from Sigma-Aldrich 1½ years ago, the price was 43 EUR (about 55 USD) for 250 mg. As you might guess, I haven't got time to test it.
So, that one looks quite a bit more attractive, given the much lower price and the fact that buying from Sigma-Aldrich may not be very straightforward (at least you need a company).
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icyanine A, 98%
