33 replies to this topic

[Mumbles]

Ethyl Acetate isn't totally miscible with water, but if you don't mix enough you could be confused.  About 8% by mass dissolves in water.  Amyl Acetate smells strongly of bananas.

 

It really presents a peculiar set of properties.  I really can't think of a single thing that will dissolve parlon but not polystyrene.  The smell, miscibility with water, and the solvation of parlon made me think of Tetrahydrofuran.  This will dissolve PVC though. 

[whoof]

Density would be useful as it could be used to at least rule out some candidates.
If it comes to splitting hairs, im up at HOAC next couple of W/E
i could drop by with some petro hydrometers (and my nose).

If you can do so safely, measure density, boil for a while, measure density again.
If it changes that would indicate a mixture.

Does not dissolve pvc, try soaking it for a day, does it soften the surface ?

Pvc adhesive contains THF, MEK and chlorohexanone, some add acetone.
Naturally water clear although other stuff is sometimes added.

Dip a pipe in it and it does not dissolve,push them together and they stick.

Edit

Try sticking 2 bits of pvc together with fresh stuff before anything evaporates.

Edited by whoof, 01 May 2013 - 05:05 PM.

[fruitfulsteve]

Definetly don't smell of banana.

 

My mistake.. disolves parlon and polystyrene....doesn't disolve 'stearin' thought it was same stuff, obviously not

 

HOAC ?? sailing, rock climbing, or fishing ? you're welcome to pop round for a cuppa and some solvent sniffing   a second opinion would be great. I'll inbox you my mobile number.

 

My friend who gave me the stuff is going back to the house tomoz so hopefully will get a bit more info and maybe some more stuff.

 

I'll try a few more tests after work tomoz if i get finished early.

[whoof]

Definetly don't smell of banana.
 

 
HOAC ?? sailing, rock climbing, or fishing ? you're welcome to pop round for a cuppa and some solvent sniffing   a second opinion would be great. I'll inbox you my
 
.

None of the above , I'm going a mile further to a less salubrious location.

Error in previous post .
Cyclohexanone not chlorohexanone, remembered something though,

some say it smells of laundry detergent, other say petrol type smell.

Tested my stuff and it burns very badly with a lot of smoke.

I'll give you a buzz. Oh you can probably do that yourself.
How to attach smileys ?

[fruitfulsteve]

Cool.

 

Looks like i'm gonna be working sat morning but in the rest of weekend.

 

Click on smiley face above and a load will appear at the bottom of the screen

[fruitfulsteve]

After a quick visit from Whoof who did some density tests, it would appear that we have acetone and butanol poss but 1 and but 2. So thats wat i'm gonna label them as but with a ? just in case.

[PyroSkitz]

YAY! we got an anwser!! ive been following this waiting for it!!, shame it wasnt amyl acetate with the sweet smell, my guess would of been spot on, maybe next time

[whoof]

Not convinced though.
That acetone definitely smelled weaker than the known acetone, wondering if anything smells like it.
Checked my balance when I got back if anything it's under reading rather than over.

[PyroSkitz]

yeh acetone i could recognise from a mile away i reckon, i use the stuff way to much than a normal person should *cough* i work with fireworks *cough* hahaha...

 

im sure you are right with the reading, but seems weird why the "chemist" would use a acetone and butanol mixture, i have never heard of old photo devoloping using that mixture!! but then again, thats their hobby, which i know fairly little about...im sure it works with opposites, as they might know little about ours

[fruitfulsteve]

As it turns out we only read halfway down the density chart..DOHHH !! methanol @ .781, 1-propanol @ .803 and 2-propanol @ .785 could also be candidates plus a couple of other close ones if your scales are out a bit.

 

I said 'professional chemist' they don't just develop film (or dispense perscriptions) and few are hobbyists. Not acetone/butanol mixture 3x diffeant solvents in seperate containers.

[whoof]

Ok Turns out that the calibration checks I made were done with contaminated stuff.
I've bought some fresh distiller water and the results are pretty much spot on.
The dry weight of the flask should have been 62.68 g.
Did not keep a record of the results can you remind please.

[fruitfulsteve]

1/ .793  2/ .8226  3/ .8175   i've got 62.55 for the flask.

[whoof]

1 . Spot on for methanol after correcting for temperature, 16 deg C.

2-propanol is ipa, smell should give that one.

3 had a definite acetone smell but weak so 2 and 3 could be mixtures.

The calibration liquid was anhydrous ethanol as it is in the same range.
Results were close to 2&3 .
Burn test however left water residue so it was not what the label said.
Another test with methanol was spot on , so origional results stand.

"Few are hobbyists"
Hope digger does not see that.

Edited by whoof, 08 May 2013 - 04:51 PM.

[fruitfulsteve]

Don't really smell like methanol.

 

As they were unlabelled i was thinking perhaps they might have been his 'waste' solvent bottles...just a thought !!

 

I did say 'few'

[digger]

"Few are hobbyists"
Hope digger does not see that.

 

Not sure what you mean. I like Hobbyism, I do rather alot of that in various fields