I was wondering about this myself, and thought that post-dye washing might lead to a whole new set of variables. There IS a method to the madness
Spectral sensitizing dyes
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I was wondering about this myself, and thought that post-dye washing might lead to a whole new set of variables. There IS a method to the madness
PE,
Sorry about the dye/pigment confusion. Must have head in two different places at once. "Back in the day" I worked with pigments, not dyes.
Bil
Sorry about the dye/pigment confusion. Must have head in two different places at once. "Back in the day" I worked with pigments, not dyes.
Bil
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It's not an issue either if a thick (holographic) grating is used that largely suppresses higher diffraction orders.
Are you sure? diffraction orders are part of the nature of diffration gratings. It's the overlap between the 1st order and 2nd order that comes into play when trying to record a wide range of wavelengths. If you are trying to measure upto 900 nm in the IR with a 1st order diffraction, the second order diffractio for 900 nm will start to overlap at 900/2= 450 nm, which is where you are trying to record blue wavelengths.
We don't even have to worry about 3rd and 4th order diffrations, as they will overlap starting at 300 nm and 225 nm respectively.
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Yes (sorry for the late reply), with a thick enough volume holographic grating you can suppress higher diffraction orders.
To get back to AgX spectral sensitizers, here's another link: http://www.organica.de/en/Products/49,Functional_Dyes
OP
OP
03910 and 03930 look like possible candidates. Look for structures like those but with less steric hindrance.
PE
PE
Hello Ron and All,
Recently, I have been working with an emulsion that is higher in I:Br ratio than I have worked with previously. As I have written here befor, I work with Ron's suggestion of DSA3057 (red senisitizer due to J aggrigates) and SDE 3008(green sensitizer). By total accident, I have found that the SDE3008 is acting as both a green and red sensitizer. Also the degree of sensitivity to all 3 colors is very even. There are several differences between this emulsion and what I have worked on befor. And, like all of my emulsions, it uses silane treated PVA instead of gelatin. But the latter could NOT be the reason for the accidental Red sensitivity, as I have been working with silane treated PVA emulsion almost as long as I have been working with emulsions.
There is another R&G sensitizer , or so I am told, that I will also be trying
I have slowed down lately and will be taking a "leave of absense" from "wet work" for 6-8 weeks due to upcoming surgery. But right now, I am taking the above emulsion, which I HAVE been able to replicate and scale up, and try to improve the coating chracteristics. As of now, containing no sufactant at all, it leaves random craters when coated onto very clean glass.
Best of luck to you all,
Bill
Recently, I have been working with an emulsion that is higher in I:Br ratio than I have worked with previously. As I have written here befor, I work with Ron's suggestion of DSA3057 (red senisitizer due to J aggrigates) and SDE 3008(green sensitizer). By total accident, I have found that the SDE3008 is acting as both a green and red sensitizer. Also the degree of sensitivity to all 3 colors is very even. There are several differences between this emulsion and what I have worked on befor. And, like all of my emulsions, it uses silane treated PVA instead of gelatin. But the latter could NOT be the reason for the accidental Red sensitivity, as I have been working with silane treated PVA emulsion almost as long as I have been working with emulsions.
There is another R&G sensitizer , or so I am told, that I will also be trying
I have slowed down lately and will be taking a "leave of absense" from "wet work" for 6-8 weeks due to upcoming surgery. But right now, I am taking the above emulsion, which I HAVE been able to replicate and scale up, and try to improve the coating chracteristics. As of now, containing no sufactant at all, it leaves random craters when coated onto very clean glass.
Best of luck to you all,
Bill
OP
OP
Thanks for the update Bill. The behavior that you see is not unusual. It is probably due to Iodide concentration on the different grains, or on the absolute concentration. If it is the latter, then the sensitivity will gradually shift towards being all red if you up the concentration slightly. But, OTOH, either mechanism is ok. It really does not matter. Repeatable success is what counts.
Best wishes on the surgery and may your recovery be swift and complete.
PE
Best wishes on the surgery and may your recovery be swift and complete.
PE
Examples
Thanks,PE-Here are two examples. When you judge the coating quality, please remember that I am working in total darkness with only a cheap night vision monicle to see with. I cannot realy see my coating until after the fix. The glass plates were exposed at f11 for 1 and 10 seconds.
Thanks,PE-Here are two examples. When you judge the coating quality, please remember that I am working in total darkness with only a cheap night vision monicle to see with. I cannot realy see my coating until after the fix. The glass plates were exposed at f11 for 1 and 10 seconds.
Attachments
OP
OP
Thanks Bil.
Who am I to complain. I hide all of my bad coatings in a big big box. Believe me, I know how hard it is.
PE
Who am I to complain. I hide all of my bad coatings in a big big box.
Believe me, I know how hard it is.PE
Final Update Until June
Hello to PE and All,
I have compleated my last evaluation of my current batch of panchro emulsion until I have recovered from my upcoming surgery sufficiently to move around and lift things.
My last experiment was to add O.5 M% of formalin to the the emulsion. As I have observed befor, by adding formalin to my type of emulsion, based on silane functional PVA instead of gelatin, the formalin produced two benifits. First, it caused the emulsion to coat more smoothly. The craters I observe without it are greatly reduced. Secondly, fogging is greatly reduced. I have observed the latter time after time with the type of of emulsions I am making. I do not pretend to know the reasons why. But it works. I would bet my left little toe on it. Glyoxal is more tricky. I avoid it since I once crosslinked one of my emulsions immediately upon adding the glyoxal.
When I get back to wet work, there are 2 more things that I need to do befor I begin using this emulsion to produce in camera color seps.-A, I must reduce the alcohol precipitations from 2 to 1. My emulsion,after re-uptake in water, was too thin. So I did a second alcohol precipitation being more careful to press out and drain as much water as I possibly could. The second re-uptake required a higher temperature, giving rise to more foging. 2- I would like to replace SDE 3008 with a cheaper sensitizer. There are many green sensitizers that cost far less than $600/gram+convenience fee.
In late May-June, I will return to this work and eventualy post the formula and procedure here.
Bill
Hello to PE and All,
I have compleated my last evaluation of my current batch of panchro emulsion until I have recovered from my upcoming surgery sufficiently to move around and lift things.
My last experiment was to add O.5 M% of formalin to the the emulsion. As I have observed befor, by adding formalin to my type of emulsion, based on silane functional PVA instead of gelatin, the formalin produced two benifits. First, it caused the emulsion to coat more smoothly. The craters I observe without it are greatly reduced. Secondly, fogging is greatly reduced. I have observed the latter time after time with the type of of emulsions I am making. I do not pretend to know the reasons why. But it works. I would bet my left little toe on it. Glyoxal is more tricky. I avoid it since I once crosslinked one of my emulsions immediately upon adding the glyoxal.
When I get back to wet work, there are 2 more things that I need to do befor I begin using this emulsion to produce in camera color seps.-A, I must reduce the alcohol precipitations from 2 to 1. My emulsion,after re-uptake in water, was too thin. So I did a second alcohol precipitation being more careful to press out and drain as much water as I possibly could. The second re-uptake required a higher temperature, giving rise to more foging. 2- I would like to replace SDE 3008 with a cheaper sensitizer. There are many green sensitizers that cost far less than $600/gram+convenience fee.
In late May-June, I will return to this work and eventualy post the formula and procedure here.
Bill
OP
OP
Best wishes Bill;
Some comments might be of interest.
Formalin usually causes an increase in fog. It is a reducing agent. Formalin may be reducing defects due to some surfactant property or just by dilution and lowering viscosity. Or it may slightly increase viscosity at the edges of defects and pull them together through a change in surface tension.
Anyhow, just thoughts.
PE
Some comments might be of interest.
Formalin usually causes an increase in fog. It is a reducing agent. Formalin may be reducing defects due to some surfactant property or just by dilution and lowering viscosity. Or it may slightly increase viscosity at the edges of defects and pull them together through a change in surface tension.
Anyhow, just thoughts.
PE
Yes PE,
The Formalin vs. fog thing is a mystery. Maybe the surface tension change you mentiond might somehow inhibit foging. I just DK.
I test my emulsions for fog by developing in D19. This developer is an agressive, high contrast developer and will usualy produce more fog than other developers.
BILL
The Formalin vs. fog thing is a mystery. Maybe the surface tension change you mentiond might somehow inhibit foging. I just DK.
I test my emulsions for fog by developing in D19. This developer is an agressive, high contrast developer and will usualy produce more fog than other developers.
BILL
OP
OP
That is a good test Bill. If there is fog, D19 will show it up.
PE
PE
Here are some recent resources I've found regarding spectral sensitizing, from the holography folks.
http://holoforum.org/forum/viewtopic.php?f=9&t=494
http://holoforum.org/oldforum/viewtopic.php?f=2&t=6540
http://holoforum.org/oldforum/viewtopic.php?f=2&t=3808&sid=4597f1b2162a370bf0d1e5f1831248b9
Apparently these are sensitizing dyes as well. Possibly very expensive(?, not sure...)
http://www.organica.de/en/Products/49,Functional_Dyes
Very interesting opportunity to get pinacyanol chloride
http://www.9000shops.com/holodye/index.html
via Jeff Blyth
http://cabd0.tripod.com/holograms/index.html
And haven't even read this, but it looks interesting...
The Action of Optical Sensitizers on the Photographic Plate, G. Kornfeld. Kodak Research Laboratories, Rochester, New York. Received May 25, 1938.
http://www.nap.edu/openbook.php?record_id=9565&page=97
http://holoforum.org/forum/viewtopic.php?f=9&t=494
http://holoforum.org/oldforum/viewtopic.php?f=2&t=6540
http://holoforum.org/oldforum/viewtopic.php?f=2&t=3808&sid=4597f1b2162a370bf0d1e5f1831248b9
Apparently these are sensitizing dyes as well. Possibly very expensive(?, not sure...)
http://www.organica.de/en/Products/49,Functional_Dyes
Very interesting opportunity to get pinacyanol chloride
http://www.9000shops.com/holodye/index.html
via Jeff Blyth
http://cabd0.tripod.com/holograms/index.html
And haven't even read this, but it looks interesting...
The Action of Optical Sensitizers on the Photographic Plate, G. Kornfeld. Kodak Research Laboratories, Rochester, New York. Received May 25, 1938.
http://www.nap.edu/openbook.php?record_id=9565&page=97
I want to ask everyone a basic question , Why anybody does not use original Kodak,Ilford,Fuji or others technology to sensitize their emulsions ? I saw PE had posted a list also .
I think someone could buy a good amount of sensitizer which had been produced for EFKE, Foma.
I dont think EFKE invest Kodak money to the chemicals in Croatia , they might have a local source !
There are thousands of patents waits to be analyzed in Europe and US also.
That is handwaving but I start to research from poorer manufacturers , Russian and East Europe and China.
Chris , invest your time in www.alibaba.com. China is very cheap to find chemicals.
Umut
I think someone could buy a good amount of sensitizer which had been produced for EFKE, Foma.
I dont think EFKE invest Kodak money to the chemicals in Croatia , they might have a local source !
There are thousands of patents waits to be analyzed in Europe and US also.
That is handwaving but I start to research from poorer manufacturers , Russian and East Europe and China.
Chris , invest your time in www.alibaba.com. China is very cheap to find chemicals.
Umut
Umut,
When you reference "original...technology", what era of emulsion making are you thinking of? In the beginning, there was no sensitization. That was followed by red food coloring, and then a fast-moving wave of chemicals that came and went -- with slight variations among Kodak, Ilford, and Agfa. (Fuji: I don't know much about.) Anyway, I don't think procuring sensitizing chemistry that would have been familiar to emulsion makers in the 1920s is much of a problem. I'm using a number of them.
d
When you reference "original...technology", what era of emulsion making are you thinking of? In the beginning, there was no sensitization. That was followed by red food coloring, and then a fast-moving wave of chemicals that came and went -- with slight variations among Kodak, Ilford, and Agfa. (Fuji: I don't know much about.) Anyway, I don't think procuring sensitizing chemistry that would have been familiar to emulsion makers in the 1920s is much of a problem. I'm using a number of them.
d
Denise, would you be interested in a spectrosensitometer? Bill? That is... if I theoretically had one to offer? :joyful:
I really do think that such an instrument could be cobbled together with a little bit of effort. This might be a project that I'd be able to work on in the relatively near future (winter). I'm thinking about something made out of foam-core to begin with, but a prototype could lead to something made of wood.
It might not be perfect, but I think it might be more useful and easier to interpret than shots of color charts.
If there's any interest on that front, let's discuss it over here -> (there was a url link here which no longer exists)
I really do think that such an instrument could be cobbled together with a little bit of effort. This might be a project that I'd be able to work on in the relatively near future (winter). I'm thinking about something made out of foam-core to begin with, but a prototype could lead to something made of wood.
It might not be perfect, but I think it might be more useful and easier to interpret than shots of color charts.
If there's any interest on that front, let's discuss it over here -> (there was a url link here which no longer exists)
Cyanine - First dye from PE's list
3B Pharmachem (Wuhan) International Co.,Ltd. 86-21-50328103 * 801、803、804、807 Mobile:18930552037
86-21-50328109 shanghai@3bsc.com CHINA catalog number :16038
storage temp. : 0-6°C
: a cyanine dye derived from lepidine and used for sensitizing photographic emulsions to infrared rays
Umut
3B Pharmachem (Wuhan) International Co.,Ltd. 86-21-50328103 * 801、803、804、807 Mobile:18930552037
86-21-50328109 shanghai@3bsc.com CHINA catalog number :16038
storage temp. : 0-6°C
: a cyanine dye derived from lepidine and used for sensitizing photographic emulsions to infrared rays
Umut
1,1 diethyl 11 4 quinolyl ethiodide 4,4 dicarbocyanine iodide PE's List Second Dye
CBNumber: CB6336808
Chemical Name: 1,1'-DIETHYL-4,4'-DICARBOCYANINE IODIDE
Molecular Formula: C27H27IN2
Formula Weight: 506.42
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CBNumber: CB6336808
Chemical Name: 1,1'-DIETHYL-4,4'-DICARBOCYANINE IODIDE
Molecular Formula: C27H27IN2
Formula Weight: 506.42
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1,1 diethyl 2,2 dicarbocyanine iodide /// 3th dye from PE's list
CB8200059
Chemical Name: 1,1'-DIETHYL-2,2'-DICARBOCYANINE IODIDE
Molecular Formula: C27H27IN2
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CB8200059
Chemical Name: 1,1'-DIETHYL-2,2'-DICARBOCYANINE IODIDE
Molecular Formula: C27H27IN2
Formula Weight: 506.42
CAS No.: 14187-31-6
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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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Products Intro: Product Name:Cryptocyanine
CAS:4727-50-8
Purity:98.0%(T) Package:1G More...
CB Index: 76
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CAS:4727-50-8
Purity:>98.0%(T) Remarks:C0426 More...
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CB4433150Chemical Name: CRYPTOCYANINE
Molecular Formula: C25H25IN2
Formula Weight: 480.38
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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
WebSite: www.energy-chemical.com
GLOBAL :
Recommend You Select Member Companies.
Company Name: Apin Chemicals Limited (UK) Recommend Complaint
Tel: +44 1235 832515
FAX: +44 1235 832000
Email: info@apinchemicals.com
Nationality: UNITED KINGDOM
Products Intro:
CB Index: 60
WebSite: www.apin.co.uk
Related Information: Sales Network Catalog(6271) User Evaluation(1)
Company Name: Acros Organics Recommend Complaint
Tel: +32 14/57.52.11
FAX: 201-796-1329
Email: info@acros.com
Nationality: BELGIUM
Products Intro: Purity:99% Package:1GR
CB Index: 81
WebSite: www.acros.be
Related Information: Sales Network Catalog(6039) User Evaluation(1)
Company Name: SYNTHON Chemicals GmbH & Co. KG Recommend Complaint
Tel: 49 (0)3494 63 6900
FAX: 49 (0)3494 63 6969
Email: synthon@synthon-chemicals.com
Nationality: GERMANY
Products Intro: Product Name:1,1'-Diethyl-4,4'-carbocyanine iodide
CAS:4727-50-8
Remarks:ST01380
CB Index: 65
WebSite: www.synthon-chemicals.com
Related Information: Sales Network Catalog(1951) User Evaluation
Company Name: Leancare Ltd. Recommend Complaint
Tel: +33 962096793
FAX: +33 434863170
Email: enquiry@leancare.co.uk
Nationality: UNITED KINGDOM
Products Intro:
CB Index: 42
WebSite: www.leancare.co.uk
Related Information: Sales Network Catalog(6955) User Evaluation(2)
Company Name: CARBONE SCIENTIFIC CO.,LTD Recommend Complaint
Tel: +44(0)870 486 8629
FAX: +44(0)870 486 8627/870 288 9672
Email: sales@carbonesci.com
Nationality: UNITED KINGDOM
Products Intro:
CB Index: 30
WebSite: www.carbonesci.com
Company Name: SIGMA-RBI Recommend Complaint
Tel: 800 736 3690 (Orders)
FAX: +41 81 756 54 49
Email:
Nationality: SWITZERLAND
Products Intro:
CB Index: 91
WebSite: www.sigma-aldrich.com
Related Information: Sales Network Catalog(6649) User Evaluation(11)
Company Name: City Chemical LLC Recommend Complaint
Tel: 1-203-932-2489
FAX: 1-203-937-8400
Email: sales@citychemical.com
Nationality: USA
Products Intro:
CB Index: 72
WebSite: www.citychemical.com
Related Information: Sales Network Catalog(6869) User Evaluation(1)
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Tel: 847.281.9822
FAX: 847.281.9855
Email: sales@3bsc.com
Nationality: USA
Products Intro:
CB Index: 47
WebSite: www.3bsc.com
Related Information: Sales Network Catalog(6414) User Evaluation(12)
Company Name: Service Chemical Inc. Recommend Complaint
Tel: 888-895-6920
FAX: 215-362-2578
Email: sales@chemos-group.com
Nationality: GERMANY
Products Intro:
CB Index: 71
WebSite: www.chemos-group.com
Related Information: Sales Network Catalog(6997) User Evaluation(10)
Company Name: ecochem international chemical broker Recommend Complaint
Tel: +45 45 42 34 36
FAX: +45 45 42 34 36
Email: export@ecochem.dk
Nationality: Europe
Products Intro:
CB Index: 66
WebSite: www.ecochem.dk
OP
OP
Oh, just try Tennessee Eastman. I believe that they sell some of these.
PE
PE
DICYANINE A /// PE's List 5th Dye
CB9700112
Chemical Name: DICYANINE A
Molecular Formula: C31H37IN2O2
Formula Weight: 596.54
CAS No.: 20591-23-5
SUPPLIERS: CHINA
Company Name: J & K SCIENTIFIC LTD. Recommend Complaint
Tel: 400-666-7788 +86-10-82848833
FAX: +86-10-82849933
Email: jkinfo@jkchemical.com
Products Intro: Product Name
icyanine A, 98%
CAS:20591-23-5
Purity:98% Package:1GR, 500MG More...
CB Index: 76
WebSite: www.jkchemical.com
Related Information: Sales Network Catalog(67649) User Evaluation(29)
Company Name: Meryer (Shanghai) Chemical Technology Co., Ltd. Recommend Complaint
Tel: +86-(0)21-61259100(Shanghai) +86-(0)755-86170099(ShenZhen) +86-(0)10-62670440(Beijing)
FAX: +86-(0)21-61259102(Shanghai) +86-(0)755-86170066(ShenZhen) +86-(0)10-62670790(Beijing)
Email: sh@meryer.com; sz@meryer.com
Products Intro: Product Nameicyanine A
CAS:20591-23-5
Purity:98% Remarks:40705 More...
CB Index: 62
WebSite: www.meryer.com
Related Information: Sales Network Catalog(44910) User Evaluation(14)
Company Name: Energy Chemical Recommend Complaint
Tel: 021-58432009 / 400-005-6266
FAX: 021-58432821
Email: info@energy-chemical.com
Products Intro: Product NameICYANINE A
CAS:20591-23-5
Purity:98% Package:1g;10g;100g;500g;25kg More...
CB Index: 61
WebSite: www.energy-chemical.com
GLOBAL SUPPLIERS:
Company Name: Acros Organics Recommend Complaint
Tel: +32 14/57.52.11
FAX: 201-796-1329
Email: info@acros.com
Nationality: BELGIUM
Products Intro: Purity:98% Package:500MG
CB Index: 81
WebSite: www.acros.be
Related Information: Sales Network Catalog(6039) User Evaluation(1)
Company Name: HONEST JOY HOLDINGS LIMITED Recommend Complaint
Tel: +86-755-26404303
FAX: +86-755-26404265
Email: sales@honestjoy.cn
Nationality: USA
Products Intro:
CB Index: 54
WebSite: www.honestjoy.cn
Related Information: Sales Network Catalog(6288) User Evaluation(11)
Company Name: Service Chemical Inc. Recommend Complaint
Tel: 888-895-6920
FAX: 215-362-2578
Email: sales@chemos-group.com
Nationality: GERMANY
Products Intro:
CB Index: 71
WebSite: www.chemos-group.com
Related Information: Sales Network Catalog(6997) User Evaluation(10)
Company Name: Kanto Chemical Co., Inc. Recommend Complaint
Tel: +81 3 3663 7631
FAX: +81 3 3667 8277
Email: reag-info@gms.kanto.co.jp
Nationality: JAPAN
Products Intro:
CB Index: 74
WebSite: www.kanto.co.jp
CB9700112
Chemical Name: DICYANINE A
Molecular Formula: C31H37IN2O2
Formula Weight: 596.54
CAS No.: 20591-23-5
SUPPLIERS: CHINA
Company Name: J & K SCIENTIFIC LTD. Recommend Complaint
Tel: 400-666-7788 +86-10-82848833
FAX: +86-10-82849933
Email: jkinfo@jkchemical.com
Products Intro: Product Name
icyanine A, 98%CAS:20591-23-5
Purity:98% Package:1GR, 500MG More...
CB Index: 76
WebSite: www.jkchemical.com
Related Information: Sales Network Catalog(67649) User Evaluation(29)
Company Name: Meryer (Shanghai) Chemical Technology Co., Ltd. Recommend Complaint
Tel: +86-(0)21-61259100(Shanghai) +86-(0)755-86170099(ShenZhen) +86-(0)10-62670440(Beijing)
FAX: +86-(0)21-61259102(Shanghai) +86-(0)755-86170066(ShenZhen) +86-(0)10-62670790(Beijing)
Email: sh@meryer.com; sz@meryer.com
Products Intro: Product Name
icyanine ACAS:20591-23-5
Purity:98% Remarks:40705 More...
CB Index: 62
WebSite: www.meryer.com
Related Information: Sales Network Catalog(44910) User Evaluation(14)
Company Name: Energy Chemical Recommend Complaint
Tel: 021-58432009 / 400-005-6266
FAX: 021-58432821
Email: info@energy-chemical.com
Products Intro: Product Name
ICYANINE ACAS:20591-23-5
Purity:98% Package:1g;10g;100g;500g;25kg More...
CB Index: 61
WebSite: www.energy-chemical.com
GLOBAL SUPPLIERS:
Company Name: Acros Organics Recommend Complaint
Tel: +32 14/57.52.11
FAX: 201-796-1329
Email: info@acros.com
Nationality: BELGIUM
Products Intro: Purity:98% Package:500MG
CB Index: 81
WebSite: www.acros.be
Related Information: Sales Network Catalog(6039) User Evaluation(1)
Company Name: HONEST JOY HOLDINGS LIMITED Recommend Complaint
Tel: +86-755-26404303
FAX: +86-755-26404265
Email: sales@honestjoy.cn
Nationality: USA
Products Intro:
CB Index: 54
WebSite: www.honestjoy.cn
Related Information: Sales Network Catalog(6288) User Evaluation(11)
Company Name: Service Chemical Inc. Recommend Complaint
Tel: 888-895-6920
FAX: 215-362-2578
Email: sales@chemos-group.com
Nationality: GERMANY
Products Intro:
CB Index: 71
WebSite: www.chemos-group.com
Related Information: Sales Network Catalog(6997) User Evaluation(10)
Company Name: Kanto Chemical Co., Inc. Recommend Complaint
Tel: +81 3 3663 7631
FAX: +81 3 3667 8277
Email: reag-info@gms.kanto.co.jp
Nationality: JAPAN
Products Intro:
CB Index: 74
WebSite: www.kanto.co.jp
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
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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