Looking for a grease/lubricant that is resistant to chloroform

[HAYAO]

TL;DR Summary

Looking for a grease/lubricant to seal an apparatus to contain chloroform

I'm doing an experiment in a system that I use chloroform, and the apparatus needs to be sealed by a grease so that chloroform won't leak out. I've been using fluorine-based grease/lubricant to seal since conventional silicone-based grease/lubricant will easily be dissolved by chloroform, but it's not enough. What happens is that although chloroform won't leak, the grease/lubricant is dispersed into the system and contaminates it.

Does anyone know of a grease/lubricant that is strongly resistant to chloroform?

 

[berkeman]

I did a Google search on grease that is resistant to chloroform and got lots of hits. Here's one of the first hits on the list:

Krytox
https://www.krytox.com/en/-/media/f...f826b30&hash=D3EAE7543F89EF06A3CAF7749553E70E

Page 2 explicitly lists Chloroform.

 

[HAYAO]

I did the same search and that is literally the only relevant hit, but thanks.

I wonder if it's resistant enough that it repels chloroform. Also, I got to see if it's sold in Japan.

 

[TeethWhitener]

To be honest @HAYAO, when you said “fluorine based” I immediately thought that you were talking about Krytox, which would have been my suggestion had you not said that.

Maybe Apiezon? I’ve used that in Schlenk lines for as long as I can remember and it seems to work ok (I prefer it to silicone grease for the rather dumb reason that I can see it through the glass). But I’m not doing anything that can’t be fixed by slapping on a little more, so if you need a lubricant to perform for long periods without crapping out, I’m not so sure.

 

[phinds]

I did the same search and that is literally the only relevant hit, but thanks.

When, as in this case, you HAVE done some of your own research, PLEASE state what you have found. It is rude to make us re-do a search you've already done, with us thinking that you have overlooked it.

 

[HAYAO]

Okay, I have never heard of Apiezon. Thanks.

When, as in this case, you HAVE done some of your own research, PLEASE state what you have found. It is rude to make us re-do a search you've already done, with us thinking that you have overlooked it.

Understood

 

[berkeman]

When, as in this case, you HAVE done some of your own research, PLEASE state what you have found. It is rude to make us re-do a search you've already done, with us thinking that you have overlooked it.

Good point, but no big deal in this case. I was just proud of myself that I found something!

 

[phinds]

Good point, but no big deal in this case. I was just proud of myself that I found something!

Yeah, but I mean hell, Mike, you're proud of yourself if you remember to brush your teeth

 

[nitus324]

Dear Sir or Lady,
have you tried to use conically ground fittings (in some countries called "normed fittings") and seal them with TEFLON-TAPE?

Summary: Looking for a grease/lubricant to seal an apparatus to contain chloroform

I'm doing an experiment in a system that I use chloroform, and the apparatus needs to be sealed by a grease so that chloroform won't leak out. I've been using fluorine-based grease/lubricant to seal since conventional silicone-based grease/lubricant will easily be dissolved by chloroform, but it's not enough. What happens is that although chloroform won't leak, the grease/lubricant is dispersed into the system and contaminates it.

Does anyone know of a grease/lubricant that is strongly resistant to chloroform?

 

[HAYAO]

Yeah, sorry guys. And thanks