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Author: Subject: Latest chemical order?
arkoma
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[*] posted on 25-5-2020 at 11:39


@woelen--urea is cheap, easy and pure from DEF--diesel exhaust fluid. Brilliant white xtals from just letting the water evaporate. It has to be very pure so it doesn't poison the catalyst brick in the exhaust.

https://en.wikipedia.org/wiki/Diesel_exhaust_fluid




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woelen
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[*] posted on 25-5-2020 at 14:15


I have never seen this in NL. Probably it is something which is common in the USA, but not where I live. I did not know of its existence.
Over here, we can buy urea OTC, as fertilizer. The material, however, is off-white and when it is added to water, you get a dirty-looking turbid liquid with a lot of pale brown greasy foam on it. Not really attractive to work with. The urea which I now have is P.A. grade, it dissolves very well and gives perfectly clear and colorless solutions. For 500 grams I only paid GBP 6, very acceptable to me.




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XeonTheMGPony
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[*] posted on 25-5-2020 at 16:20


https://www.nzchemicalsuppliers.co.nz/content/page/adblue

https://mckeown.co.nz/products-and-services/goclear/

here ya go

It's s old every where in canada too

[Edited on 26-5-2020 by XeonTheMGPony]
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[*] posted on 25-5-2020 at 19:53


The urea solution is called AdBlue in the Netherlands and Germany, it is a 32.5% solution of urea in dH2O.

Labshop.nl also has urea and thio urea.

[Edited on 26-5-2020 by Tsjerk]
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arkoma
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[*] posted on 26-5-2020 at 08:42



6 Brit pounds for 500gm is high next to DEF.




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woelen
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[*] posted on 30-5-2020 at 12:12


Keep in mind that the material is A.R. grade. The DEF is for technical purposes and it is dissolved in water.
I am happy with the A.R. grade material. I also have 1 kg of fertilizer grade, but I'll use that for its intended purpose :)




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[*] posted on 4-6-2020 at 18:47


Received today:
Sodium sulfite NaSO3 200g
Sodium nitrite NaNO3 500g
Tin ii chloride SnCl2 100g
Bismuth nitrate Bi(NO3)3.5H2O 500g

And a few 500ml beakers to replace the recent broken ones....
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[*] posted on 5-6-2020 at 00:08


Is your tin chlotide hydrated or anhydrous? The two are very different.
I have used tin dissolved in HCl whenever I have needed tin chloride solution. Much easier than working with the powder.
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[*] posted on 5-6-2020 at 12:01


Strontium Nitrate.

It's fireworks season soon.....




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[*] posted on 5-6-2020 at 13:08


J_sum1 I don’t know if the hydrate or anhydrous. Seems very soluble in water though. How do you dissolve tin in hydrochloric acid? Seems almost no reaction at room temp between tin granules and concentrated HCl. Do you heat it, or add hydrogen peroxide?
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[*] posted on 5-6-2020 at 13:21


I refluxed tin granules in HCL with vigorous stirring. At the top of my condensor I used my 24/40 to hose barb adapter and ran the hose through a suckback and then into a wash bottle with saturated NaCO3 solution. Those HCL fumes are really a bitch if not contained.



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[*] posted on 5-6-2020 at 13:49


And pound of benzoin, half liter of GAA, DCM and a few grams of NBS :)
Fun! :D
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[*] posted on 5-6-2020 at 14:40


Quote: Originally posted by arkoma  
I refluxed tin granules in HCL with vigorous stirring. At the top of my condensor I used my 24/40 to hose barb adapter and ran the hose through a suckback and then into a wash bottle with saturated NaCO3 solution. Those HCL fumes are really a bitch if not contained.

Sounds like you have a good batch of ZnCl2 then.
At my previous school we had both anhydrous and dihydrate. Both were old and likely oxidised. Getting anything better than a cloudy suspension was difficult even in strong acidic conditions.

To dissolve Sn in HCl, melt it first in a shallow container and then swirl. You then get a thin foil free from oxide. Cut into small pieces and stir in concentrated HCl for several hours. Heating would probably speed things up but I did it at RT with plastic wrap over the beaker to contain fumes.
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[*] posted on 13-6-2020 at 18:17
platinum and silver order


Hello all! I'm a long time lurker here, and I'm excited to join in the fun, and hopefully contribute something useful. I was enticed to finally join by draculic acid69's offers of the sale of small amounts of platinum.

I have recently received an order I placed with him of 2 g of 99.9% Pt, and 10 g of 99.9% Ag while I was at it, and I am very happy with the transaction. He was very responsive and his prices were quite reasonable, especially for such small amounts. I definitely recommend him for anyone looking to buy a small amount of platinum.

Below you can see the samples, along with their masses according to my balance. The coins are just for size reference.

Ag&Pt 2 resized.jpg - 205kB

For now my use of the Pt is mostly as an element sample, with vague ideas of future catalyst experiments. I plan to convert the Ag to silver nitrate.
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[*] posted on 17-6-2020 at 20:57


I just bought 100 grams of palladium 5% on activated carbon.

The minimum bid was so low I couldn't resist the chance to feel like I was gonna buy some, then nobody else made a bid.

It was $1.97 per gram.

I'm assuming 100 grams of 5% palladium must, for some reason, contain less than 5% palladium by weight.

Cheap is cheap, but there's no way I just paid 2/3rds of spot for this.





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[*] posted on 17-6-2020 at 21:13


Quote: Originally posted by SWIM  
Cheap is cheap, but there's no way I just paid 2/3rds of spot for this.
WTF im so jealous
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[*] posted on 18-6-2020 at 22:51


Sometimes you really can be lucky. I myself won an auction of NH4ReO4 a few years ago, 160 grams, for just GBP 40, including shipping. I was the only bidder.



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[*] posted on 18-6-2020 at 22:55


500 mL dichloromethane
10 grams 4-dimethylaminopyridine
100 grams n,n-dicyclohexylcarbodiimide
250 mL tert-butyl alcohol

hope i can do some steglich esterifications x)




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[*] posted on 19-6-2020 at 18:20


Cou,

Be careful, very careful, with n,n-dicyclohexylcarbodiimide (DCC). It is a wicked sensitizer and once you become sensitized to it you cannot even get close to where it is being used. You will break out in a rash and then swell up if your reaction is severe. I had an assistant who was careless and had to go on disability because of sensitivity. Do not let this stuff touch your skin. When you use it, melt it so you can handle it as a liquid with a dropper. Do not try to chip out the solid. If you plan to use it regularly, make up a standard solution in a suitable solvent that you can handle with a syringe.

Also, the reaction product, dicyclohexylurea, is a bitch to get rid of. Even when you think it is gone it will still crystallize out of whatever solution you have. Hopefully you will be able to distill any esters you may make with this reagent.

AvB
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arkoma
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[*] posted on 20-6-2020 at 08:23


1 pound of zinc dust



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[*] posted on 21-6-2020 at 15:07


Quote: Originally posted by arkoma  
1 pound of zinc dust

I did the same thing a couple of months ago. I later found that I actually had two pounds from more than a decade ago.
Strange the things we forget and place in a box to only be found later.
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[*] posted on 22-6-2020 at 22:12


Quote: Originally posted by morganbw  

I did the same thing a couple of months ago. I later found that I actually had two pounds from more than a decade ago.
Strange the things we forget and place in a box to only be found later.

Can't recommend taking inventory enough! I have an excel sheet with all my chemicals including synonyms, CAS numbers etc for easy searching, amount, purity, formula, price, links to GESTIS or MSDS and storage location (as well as a sticker on each bottle which tells me which cabinet it came from) etc. but also molecular mass, concentrations and densities so I can simply put in the number of moles I want to use in a reaction and get the masss or volume I need. Poor man's LIMS ftw!

Anyway, I just used my tax return for a bottle of argon and a nice regulator.
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