pekotzvetkov
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Location: Sofia, Bulgaria
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A sale list of my chemicals that I have more that I need
Hi all!
This formum as long as the German Lambadasynth are long time not only source of information, but a companions.
i live in Sofia, Bulgaria and have a small lab, in which I forgret about all that's out there and spend great, great hours working there. So..
As I need to buy some expensive glassware I wish to sell some rare materials, which I owe in small quantities and I thing I will not use them all till
my life is over. If anyone is interested - please contact me, I will send you pictures and samples, all my reagents are old, but of the highest
quality and have been under strict storage as far as I know before they are with me now. Everything can be purchased in any wanted gms or mls, with
the best packaging and containers that are avaiab;le here. My price - 1/3 of the lowest internet price. Most of the stuff is labled "for synthesys"or
"for analysis".
So, my list:
- thionyl chloride - Merck - 200 ml.
- phosphorous oxychloride - 250 gms., Merck
- capronic acid - USSR, 400 gms.
- 1-bromobutane - 1x100 ml unopened, Merck
- 1-chloro-3-bromopropane - 1x250 ml, unopened, Merck
- potassium iodate - unknown to me Swiss firm, 100 gms.
- potassium chromate - 500 gms. unopened, Swiss made
- benzene - 250 ml. Merck, unopened
- Dewar's alloy - Checz firm, 2 x 100 gms, unopened
- 4 unopened Ion-exchange resin boxes x 500 gms, unopened, German made
- potassium permanganate - Merck, 250 gms.
- zink palletes, 100% pure - 250 gms.
- dichloroethane - 500 ml., Merck
- glass tubes - more than 100 at 50 to 1 meter, different sizes
- bromoethane, 100 ml., Merck
- p-nitroaniline - 100 gms, German
- Boric acid, 500 gms, Swiss made, unopened
- many different indicators
There is more, but I can not think what to add here, so please ask me if you need something particular.
The prices for the EU for the Bulgaerian Post is about 15 euro for under 1 kilogram.
Leave only your footsteps, take only good impressions...
Petko Tzvetkov
Sofia, Bulgaria
Viber and vocice ++359876215939
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RustyShackleford
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sent U2U
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Tsjerk
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What kind of ion-exchange resin do you have?
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pekotzvetkov
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Posts: 8
Registered: 25-1-2019
Location: Sofia, Bulgaria
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Hi there!
Well I have 8 boxes 500 gms, of cation and anion exchange resin. I think they are 4/4 and they are made somwhere in the 80's by a West-German firm (I
can check details and send pictures if you like). The boxes are sealed and are working just well...
Best regards!!
Leave only your footsteps, take only good impressions...
Petko Tzvetkov
Sofia, Bulgaria
Viber and vocice ++359876215939
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pekotzvetkov
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Some new stuff I set aside as too much for my projcts...
- cyclohenaol, 500 ml. from unopened 1 l. bottle , marked P.O., made by Polchem
- 3 gms. of lithium borohydride ( Merck, perfectly perserved )
- Methanesulphonylchloride ( CH3SO2Cl ) - 125 mls., purum, by Fluka
- frehly made MnO2 oxidiser for synthesis ( made by the best and most active
patented method via the reaction of manganese sulphate and potassium permanganate
- I guarantee just PERFECT - yeields of oxidation of benzyl alcohol to benzaldehyde are around 75%)
- 10 gms. really pure 99.999 magnesium ribon by Merck, not made any more.
- AqCl2 - silver chloride granules - 5 gms.
- ammonium floride - 125 gms.
- sodium acetate - 200 gms, Fluka
- Sodium phosphate - 250 gms., Bulgarian made, marked "purum"
- bezylacetone - 20 gms.,
- BaCl2 - 200 gms, Merck
- sodium bromate - 125 gms., Fluka, P.A.
- sodium bromide - 125 gms., Fluka, for synthesis
- Pd/C 10% - 10 gms. - I can give that on a very good price as I recently suceeded with the extraction and purification of the palladium from old USSR
electronics that are stil found here and are cheap ( I use dimethylglioxime DMG ).
- Palladium black - 1 gm. for now ready.
As well friends, I have producing small batches of the downlisted pricy and hard to get reagents for years and I can guarantee the quality, that by
analisys via my procedures are always "purum", and - if someone needs some small batch of something, but do not have the time or/and the reagents to
do them - please ask me - I can research if I can cope with the order and the synthesis. So be brave, I desperately need work...
So what I can offer for now:
- benzyl chloride
- piperine ( from black paper ) on recristalised cristals
- benzaldehyde - via 2 methods - nitration of toulene and oxidation of benzyl alcohol.
- Urushibara nickel catalist ( I can preare both UNi/A and UNi/B as desired ) - it is known that when quality dried ready for work catalist in the
form of dustis pretty stable when dried over H2SO4 and properly stored and sealed... So it can be shipped and as far as I know it do not loose its
catalic activity for years.
Please feel free to contact me and discuss the matters.
Well please be safe, do not breathe the products of your reactions and stay safe from Covid-19, this nasty, nasty desiese.
[Edited on 17-2-2021 by pekotzvetkov]
Leave only your footsteps, take only good impressions...
Petko Tzvetkov
Sofia, Bulgaria
Viber and vocice ++359876215939
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pekotzvetkov
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Some items sold, some new added
Hello fellow chemists!
I;m informing that I sold all the palladium on carbon, as well as the - thionyl chloride -
- - phosphorous oxychloride - 250 gms.,
- 1-chloro-3-bromopropane - 1x250 ml,
- thyonil chloride
Of those I will not have except for the palladium Pd/C 10%, of which I will have 12-15
gms, in about 20 days on the price of 35 euro again. The qualithy is excellant.
I reviewed my lab and I have some more to add for a really good price selling:
So:
- zinc acete, for synthesis, 200 gms, Fluka, from 500 gms bottle
- sodium phosphate - Na2HPO4 12 H2) - 500 gms, purum, Bulgaria
- AlSo4 12 H20 - 400 gms, from 1 kg, bottle, Russian, purum
- KCL - 500 gms, purum
- NaCo2 - 1 kg, purum
- Aluminum oxide for chromatography - full 1 kg bottle, Fluka
- NaBH4 - 100 gms. 2 x 50 gms
- 3 gms. LiBH4, Merck,
- 25 gms, LiAlH4, 97%
- sodium acetoborohydrate, 4 gms in freshly made solution
- 2 gms 95% metallic palladium
- benzyamine, 100 ml, bottle
- iodine - 15 gms. pure
- iodine - 5 gms. resublimated
- potassium dichromate - Fluka 500 gms, unopened package
- sodium ethyl sulphate - 50 gms.
- benzyl chloride - 5 x 100 mls, redestilled, synthesied from active MnO2 and pure benzyl alcohol
- ethyl bromide - 5 x 100 mls, redestiled, pure
- ethyl iodide - 2 x 100 mls
- sodium sulfite - 250 gms.
- sodium salicilate - 500 gms, Fluka, unopened
- lead acetate - 50 gms., Pure
- 3 bottles 500 gms, unopened, cartion and anion exchange resin
- boric acid - 500 gms, unopened, Fluka
- chloroform 1 l. unopened 99.7 pure
- phosphorous trichloride - 15 mls, redestilled, may accept orders for little more
- p-nitroaniline - 200 gms.
- arsenic trichloride - Merck - 100 gms,
- 9,10-phenanthrenequinone
- phenylhydroxylamine
- 10 gms, red phosphorous, purified
- 2 100 ml. Drexel bottles
- 5 Jena glass, glass joint, flat bottom flasks
- 50 - .5 cm - 2 cm - 50 - 100 cm. glass tubes
- 5 infrared tubes, different spectrum, from chromatographer.
- 1 magnetic stirrer, Czech made, 2000 RPM stirrer, 100W plate, controlled by 2 x 50 W buttons. As new, plus a whole another for parts.
- vaccuum manometer
- 1 2 neck 500 ml. Wulff flask
- 1 500 ml. brand new Sloxlet extractor Jena N29
- 1 500 ml. 3 necked flask Termisil N29
- acetaldehyde - by order, pure
- DMSO. 1 l. 99.9 pure
- anode plates on kilogram scale - from copper, zinc, nickel. Making palladised, mangananese plated, silver plated custum size ny pre-order
- stnnous II chloride 250 gms. x 2 - 98%
- capronic acid 750 gms. from1 l botttle, Russian, purum
- Complexon I
- lithium chloride 100 gms Merck
- 1 kg. pure alluminum stergens
Leave only your footsteps, take only good impressions...
Petko Tzvetkov
Sofia, Bulgaria
Viber and vocice ++359876215939
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pekotzvetkov
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Registered: 25-1-2019
Location: Sofia, Bulgaria
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Hi there fellow chemist!
About the ion-exchange resigns. I have 4 unopened boxes of 1000 ml each. As follows:
1. WOFATIT KS 10 - Cation-exchange based on polystyrene - SO3H and Na+ - Made in Germant by VEB FABENFABRIK VOLFEN - 2
bottles of that type
2. WOFATIT KPS techn. - Cation-exchange based on polystyrene - SO3H and Na+ - Made in Germany VEB CHEMCOMMAT
-3. WOFATIT KPS techn. - Anion-exchange based on polystyrene - Made in Germanty VEB CHEMCOMMAT
and I forgot - I have 2 unpened 250g. Fluka, Switzerland cation exchange resins DOWEX 50W X8 - 30-50 mesh, H+, with sulfonic
acids as active groups,
This ones are GREAT for nice homemade exchange membranes, for batteries, fuel cells and electro-organic
synthesis!!
I'm ready to give you a really, really unbreakable price, I already sold some orders, and everyone says that my prices are far the best here.
I can ship you anywhere.
Please feel free to write and call me voice or Viber at
+359 876 215 939
Petko Tzvetkov
Sofia, Bulgaria
   
Leave only your footsteps, take only good impressions...
Petko Tzvetkov
Sofia, Bulgaria
Viber and vocice ++359876215939
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pekotzvetkov
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Posts: 8
Registered: 25-1-2019
Location: Sofia, Bulgaria
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Some new things for sale:
- Murexide -- ammonium purpurate metal indicator - 75 gms. RONAL, Budapest, Hungary
- Tetrazolium chloride (IUPAC name 2,3,5-Triphenyl-2H-tetrazolium chloride) - https://en.wikipedia.org/wiki/Tetrazolium_chloride
- Methyleneblue - 100 gm. bottle
- Devarda's alloy - p.a. - 2 unopened dark 100 gm. bottles, made in Poland
- ASMIT 261 ion-exchange resin, 250 gms., unopened bottle, Holland
- Sodium floride, A.R., Roanal, Polland, 500 gm, unopened
- Sodium thiosulphate - A.R., Roanal, Polland, 250 gm, unopened
- 8 hydroxyquinoline, A.R., Roanal Polland, 20 ml unopened dark bottle
- Morin, Fluka, for microscopy, flouriscain indicator, 10 gm=. unopened, purum p.a.
I think that will be all for now.. Please if you want picturs of anything in the llists, do not hesitate to ask me!
Leave only your footsteps, take only good impressions...
Petko Tzvetkov
Sofia, Bulgaria
Viber and vocice ++359876215939
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pekotzvetkov
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Posts: 8
Registered: 25-1-2019
Location: Sofia, Bulgaria
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Hi all,
I have more for you:
- potassium bromide, REACHIM, for analisys, 500g. unopened jars 500 g. - 25 Euro, 2 jars available
- WONDERFUL resublimated IODINE, not like the China "pearls" that passivate themselves and ruined so many reactions, this thing is Italian and is
really, really pure. The price is astonishing - 35 Eu/125 gms. Not much lesft, about 500 g.
- H3PO4, for analisys, 85%, 1l. unopened bottle, 2 bottles, 20 EU each
- Benzaldehyde Fluka - 10 x 100 ml. from 1 l. Unopened Fluka bottle - price - 20 EU/100ml.
- Aluminium DG - for chromatography - 1 kg, unopened
- Calcium Chloride hydrate, for analysis, Merck art. No. 2382 - about 600 gr.
- Stannic oxide - SnO2 - 100 gm./ 5 unopened bottles / REACHIM / for analisis - 12 EU
- 1, 10 phenanthroline - 2 bottles - 8 euro each
- phenylhydroxylamine - 1kg., Polish made ? - 30 - euro unopened
- salicilic acid, 0.500 g., unopened
- capric acid - pure - about 0.400 g. - 30 euro
- methanesulfonylchloride - CH3SO2Cl - about 150 ml, from 250 ml Fluka bottle
                  
Leave only your footsteps, take only good impressions...
Petko Tzvetkov
Sofia, Bulgaria
Viber and vocice ++359876215939
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enlight
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Can you give an update for people who have been waiting longer than two months after payment, just for a tracking number? I get that you ran into some
COVID-related issues last month, but I haven't heard a single thing from you in weeks.
I have done business with several vendors here, and I suggest that if you intend to make a business out of this, you should work on your
communication.
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Fery
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Petko apologized to me via email with the same information that he is recovering from COVID-19 about 1 month ago. I'll wait 1 extra month and if
nothing new I'll ask for returning money. I hope he will recover fully and keeps his promises but until that I cannot yet suggest him as a trustworth
seller/supplier. Luckily I did not order from him so much as I usually do. His last activity in the forum is dated 19th April so since then nobody
could order anything from him via private message system.
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pekotzvetkov
Harmless
Posts: 8
Registered: 25-1-2019
Location: Sofia, Bulgaria
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I appologise, to the guys in the USA. THe rules turn out to be simple confiscation, so I really can not do better.. The only way is DHL, wich of
course was not included in my offers, as it costs more than the shippment itself. There is guys from EU which did not had that nasty problem and all
of them revieved their wished. I'm ready to reship all again, the chemicals will be on me, but I just can not think of way to ship it. It is due still
going restrictions for Covid here in Bulgaria. I'm devastated from the illness and not making this synthesis business work the way I thought it will
be.. Please propose me a way to fix things, and you all know you can always call me voice to sort things out.
Petko Tzvetkov
Leave only your footsteps, take only good impressions...
Petko Tzvetkov
Sofia, Bulgaria
Viber and vocice ++359876215939
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enlight
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Registered: 8-2-2021
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I'm glad to hear you have it figured out, just try to keep the communication line active. I don't mind waiting longer or whatever, I just like knowing
somebody did not run off with my money. You do not seem like the type of person to do that, but you never know. There is a lot of trust involved in
these types of transactions.
Just let the affected people know what your plan is soon and we'll be appreciative. Sorry to hear COVID has been negatively impacting you.
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