Sciencemadness Discussion Board

New Ozonelabs Video. The Halogens- Bromine and Iodine

Ozonelabs - 7-8-2009 at 03:45

Thanks to several members that posted in our last thread we produced another video detailing some reactions of Bromine and Iodine.

All comments are very welcome as are requests for more videos.

http://www.youtube.com/watch?v=DwQvEEWcOUA

Regards,

The Ozonelabs Team

Jor - 7-8-2009 at 05:49

Very nice. Maybe you should do another video on bromine and iodine, as there are much more reactions that might be interesting to show.

I was amazed to see a 2,5L bottle of 1,1,1-trichloroethane. That stuff is worth a lot of money. Because of the Montreol Protocol, carbon tetrachloride and trichloroethane are very hard to acquire, and are very expensive due to heavy taxes. Acros lists the stuff for 45 euro for 250mL, and Aldrich for something like 220 euro per liter. So why didnt you use something like DCM or chloroform? :(

I was wondering, is it allowed by law to have cylinders of something as lethal as H2S?

Ozonelabs - 7-8-2009 at 05:59

We've actually got... 6l in total of Methylchloroform, its just a very good solvent.

There are no laws pertaining to Hydrogen Sulphide.

[Edited on 7-8-2009 by Ozonelabs]

blogfast25 - 7-8-2009 at 07:48

Interesting to see IBr being formed...

By the way, I'm having serious trouble posting a new thread. After copying and pasting the text and title and pressing 'preview', I'm redirected to the sciencemadness.org frontpage. I cannot get this to work, even with numerous attempts. Never had problems before...

Anyone else having these problems?


[Edited on 7-8-2009 by blogfast25]

Ozonelabs - 7-8-2009 at 08:02

We will show the preperation of Iodine Bromide, Iodine Chloride and perhaps Chlorine Bromide also.

bfesser - 7-8-2009 at 09:33

Quote: Originally posted by blogfast25  
Interesting to see IBr being formed...

By the way, I'm having serious trouble posting a new thread. After copying and pasting the text and title and pressing 'preview', I'm redirected to the sciencemadness.org frontpage. I cannot get this to work, even with numerous attempts. Never had problems before...

Anyone else having these problems?


[Edited on 7-8-2009 by blogfast25]


Don't use HTML tags.

blogfast25 - 7-8-2009 at 09:48

Thanks, bfesser, I'll try that later...

12AX7 - 7-8-2009 at 17:49

What's up with the sideways clips?

As for redirect, any accidental use of < or > can cause it. Type < or > instead (the correct HTML code).

Tim

JohnWW - 7-8-2009 at 18:27

Quote: Originally posted by Jor  

I was amazed to see a 2,5L bottle of 1,1,1-trichloroethane. That stuff is worth a lot of money. Because of the Montreol Protocol, carbon tetrachloride and trichloroethane are very hard to acquire, and are very expensive due to heavy taxes. Acros lists the stuff for 45 euro for 250mL, and Aldrich for something like 220 euro per liter. So why didnt you use something like DCM or chloroform?

1,1,1-trichloroethane is widely used as a dry-cleaning solvent, and also for thinning correction fluid, at least here in New Zealand as far as I am aware, where it does not seem to be particularly costly. At least, I had no trouble obtaining a liter glass refill bottle of it a few years ago from a dry-cleaning firm, and I use it mainly to thin correction fluid and to a small extent to spot-dry-clean. I think it may also be used as an alternative to CH2Cl2 in PVC-joining glue. The only tax on it here is the ordinary 12½% retail GST (Gestapo Tax, or Greedy Socialist Tax, according to your politics). I am aware that CCl4, which was once used in fire extinguishers and as a dry-cleaning solvent, has become harder to acquire here in recent years, but it is still available for laboratory and industrial purposes.

The Montréal Protocol purports to relate to banning or restricting gaseous or easily vaporizable substances that "could" damage the ozone layer, a problem which affects only Antarctica (and just possibly the extreme south of South America), nearly all south of about latitude 60º South, and to a much lesser extent the practically uninhabited High Arctic; see http://en.wikipedia.org/wiki/1,1,1-Trichloroethane and http://en.wikipedia.org/wiki/Montreal_Protocol . I am not sure if New Zealand has subscribed to the Protocol. Anyway, if all chlorocarbons were banned from industrial use, how would articles made from PVC continue to be made?

blogfast25 - 8-8-2009 at 05:04

Quote: Originally posted by 12AX7  
What's up with the sideways clips?

As for redirect, any accidental use of < or > can cause it. Type < or > instead (the correct HTML code).

Tim


Blimey me Tim, after about 20 attempts and eliminating all HTML and angular brackets it finally published. Something isn't right with this forum...