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Author: Subject: Latest chemical order?
karlos┬│
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[*] posted on 11-1-2020 at 06:42


I shopped perfumery ingredienst for my latest order.

It consisted of:

2-heptanone,
2-acetonaphthone,
indole,
ethyl isovalerate,
methyl anthranilate,
2-methyl-1-phenyl-2-propanol,
caraway oil for the (R)-carvone,
helional,
and a solution of oxytocine.
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woelen
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[*] posted on 14-1-2020 at 03:10


@DavidJR: That list of chemicals must have cost you a fortune, also because of the large quantities of quite a few of the chemicals. Isn't storage of these large quantities of these chemicals not an issue? I myself also have quite a few chemicals, but space only allows me to have small quantities. The only chemicals of which I have liter or kg quantities are the basic ones like conc. HCl, ammonia, NaOH, KNO3, H2SO4. Basically the stuff you can buy OTC or from many non-specialist sellers.



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Lion850
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[*] posted on 14-1-2020 at 23:51


Nothing particularly exciting but today I got:
- Barium chloride BaCl2.2H2O 500g at A$ (Australian $) 25
- Strontium chloride SrCl2.6H2O 500g at A$ 20
- Potassium Oxalate (COOK)2.H2O 500g at A$ 25
- Sodium periodate NaIO4 100g. This was given free on 'trial' basis :)


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DavidJR
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[*] posted on 15-1-2020 at 00:49


Quote: Originally posted by woelen  
@DavidJR: That list of chemicals must have cost you a fortune, also because of the large quantities of quite a few of the chemicals. Isn't storage of these large quantities of these chemicals not an issue? I myself also have quite a few chemicals, but space only allows me to have small quantities. The only chemicals of which I have liter or kg quantities are the basic ones like conc. HCl, ammonia, NaOH, KNO3, H2SO4. Basically the stuff you can buy OTC or from many non-specialist sellers.


Here's almost all of my chemical storage:

IMG_20200114_234827__01.jpg - 1.7MB IMG_20200114_234857__01.jpg - 1.4MB
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[*] posted on 22-1-2020 at 03:05


Uranyl acetate. 65g.
No prizes for working out who I got this from.

This is my first uranium salt and will be quite enough to prepare a couple of interesting displays for the element collection. Most pleasant to spend some time with a fellow SM member and to visit his lab. :)
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[*] posted on 22-1-2020 at 05:35


You can just own uranium acetate in Aus j-sum1? I've never been able to work out the regulations
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[*] posted on 22-1-2020 at 15:05


Quote: Originally posted by Tdep  
You can just own uranium acetate in Aus j-sum1? I've never been able to work out the regulations

I don't know if I can, but I do.
I have no clear idea what the regulations say either although I have not looked for some time. What I have encountered is potential suppliers who have said, "we can't supply that" or "we can't ship that".
Happy to find out more if you know anything.
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[*] posted on 22-1-2020 at 17:37


Quote: Originally posted by j_sum1  
Quote: Originally posted by Tdep  
You can just own uranium acetate in Aus j-sum1? I've never been able to work out the regulations

I don't know if I can, but I do.
I have no clear idea what the regulations say either although I have not looked for some time. What I have encountered is potential suppliers who have said, "we can't supply that" or "we can't ship that".
Happy to find out more if you know anything.


From what I understand you need an ARPANSA licence if you operate an emitting device or if you intend to transport an emitting device, or transport a contained or uncontained radioactive source. However, there is no guidance on the legalities around storage and use of radioactive contained or uncontained substances by hobbyist. Some states have additional requirements that usually sit with their EPA or equivalent, nothing in NSW though and I don't know about Qld.
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[*] posted on 23-1-2020 at 05:37


I obtained some Dutch army surplus trioxane fuel tablets. This is the trimer of formaldehyde in a remarkably pure form (it burns with a pale blue flame, very cleanly without any smoke and leaves no residue at all). On heating it decomposes to anhydrous gaseous formaldehyde. I came across this stuff and on impulse I decided to buy it (21 big tablets for just EUR 10, less than 50 cents per tablet). One tablet is good for 3 average length cooking sessions. Any ideas for interesting organic chemistry experiments with this?



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[*] posted on 23-1-2020 at 06:20


In my experience, such tablets are a mixture of hexamine and trioxane - or are at least reported to be that. I have sevetal packets but have not thought of a use for them beyond their intended use.
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[*] posted on 23-1-2020 at 23:41


The newer ones indeed are either hexamine, or a mix of hexamine and trioxane, but the ones I obtained are from the late 1960's or early 1970's, still packaged in vacuum-sealed Al-foil. The label also says "trioxane", MIL-F-10805. If you look up this code, then you see that it is pure trioxane, old NATO surplus material. This purchase was just a gamble, but I think I am lucky with having purchased a nice interesting product. I now have 21 tablets of 30 grams of trioxane, sufficient to do a lot of experiments with it. The stuff comes in boxes of three individually sealed tablets, I picked up 7 boxes for EUR 10.

I also have hexamine (not the tablets, but the pure chemical from a chemical supplier). This stuff burns with a pale orange flame and has a fishy odor. This is quite different from my trioxane tablets.




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[*] posted on 29-1-2020 at 14:24


Quote: Originally posted by woelen  
I obtained some Dutch army surplus trioxane fuel tablets. This is the trimer of formaldehyde in a remarkably pure form (it burns with a pale blue flame, very cleanly without any smoke and leaves no residue at all). On heating it decomposes to anhydrous gaseous formaldehyde. I came across this stuff and on impulse I decided to buy it (21 big tablets for just EUR 10, less than 50 cents per tablet). One tablet is good for 3 average length cooking sessions. Any ideas for interesting organic chemistry experiments with this?


Dissolve in ether for grignard reactions x)

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[*] posted on 29-1-2020 at 15:56
Chemical order


Received my chemical order. My personal passion
is for energetics, particulary pyrotechnics.

Woelen, years ago I had a case of the military
hexamine fuel tablets. 6 tablets per tube. It
looks like something from the Korean War era.
I used them as fuel(with oxidizer) in rockets.
They did a good job !


[Edited on 2020/1/29 by MadHatter]




Power comes from the barrel of a gun !
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[*] posted on 31-1-2020 at 19:25


This last week:
- Phosporous pentoxide 500g AR
- Barium hydroxide 700g LR
- Calcium hydroxide 500g
- Toluene approx. 1.5L AR
- Carbon disulphide approx. 1.5L TG
- Tetrahydrofuran 1.5L AR
- Lead nitrate 300g
All supplied by Science Essentials. Some old stock at reduced price (or so I am told :) )

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[*] posted on 8-2-2020 at 12:32


Finally my order of diethylenetriamine (dien) arrived. This stuff looks very much like ethylene diamine (en), but it is less volatile and hence fumes less than (en). It also has a similar smell, albeit a little more putrid and a little less ammoniacal and also less pungent.

My first experiment with this is using it as a ligand with nickel(II) ions. The color of the complexes is really like the colors of the (en) complexes. When you add a 30% (dien) solution to a nickel salt (e.g. the sulfate), then you first get a pale blue precipitate and on adding more of the (dien) you get a blue solution, which turns darker on addition of more (dien) and also becomes clear again. On addition of even more (dien) the solution turns purple, much like the [Ni(en)3](2+) complex. With (dien), which is tridentate, you get [Ni(dien)2](2+).

I now make the perchlorate salt of this complex and hope to isolate the crystalline material tomorrow. The perchlorate salt of this complex is only sparingly soluble in cold water, but in boiling water it dissolves quite well. This makes it possible to isolate this complex very well. Tomorrow I will have to recrystallize it from a dilute solution of (dien) in order to get rid of other cationic species, which I introduce in the process of making (impure) nickel perchlorate.




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