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Topic: what is the heaviest non-toxic (or almost) liquid  (Read 9072 times)

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Offline wetfoot

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what is the heaviest non-toxic (or almost) liquid
« on: May 04, 2008, 09:56:34 AM »
Hi all! ;D

New to the forums, just have two questions I hope you guys can help me with...

Wanted to know what is the heaviest non-toxic (or not to dangerous) pump-able liquid?

Also was interested to know what the weight difference was between mercury and lead?

Offline Borek

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Re: what is the heaviest non-toxic (or almost) liquid
« Reply #1 on: May 04, 2008, 11:01:32 AM »
Wanted to know what is the heaviest non-toxic (or not to dangerous) pump-able liquid?

Also was interested to know what the weight difference was between mercury and lead?

Remember: library first, wiki/google second, ask on forums third!

At least answer to your second question requires just consulting any general chemistry book, or encyclopedia, or wikipedia, or even clicking on the periodic table link in the left menu. Doesn't sound too hard.
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Offline wetfoot

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Re: what is the heaviest non-toxic (or almost) liquid
« Reply #2 on: May 04, 2008, 06:14:23 PM »
Wanted to know what is the heaviest non-toxic (or not to dangerous) pump-able liquid?

Offline macman104

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Re: what is the heaviest non-toxic (or almost) liquid
« Reply #3 on: May 04, 2008, 06:45:05 PM »
Wanted to know what is the heaviest non-toxic (or not to dangerous) pump-able liquid?
Do you have an application in mind that might help someone answer your question better?

Offline nj_bartel

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Offline shelanachium

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Re: what is the heaviest non-toxic (or almost) liquid
« Reply #5 on: May 05, 2008, 08:02:48 AM »
If looking for vacuum-pump applications, Gallium (density about 6). Low toxicity, and though its melting-point is above room temperature, 29.8 degrees, it supercools easily and remains liquid at much lower temperatures unless 'seeded' with solid Gallium. Very high boiling point, so vapour-pressure negligible to several hundred degrees (unlike highly toxic Hg).


Offline wetfoot

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Re: what is the heaviest non-toxic (or almost) liquid
« Reply #6 on: May 07, 2008, 01:42:38 PM »
Thanks for the replies!

We have an application for this but there are rules, nothing heavier than lead and nothing perceived as too toxic with respect to contamination of the sea (In a closed system, so theoretically it shouldn't leak).

Mercury would be ideal apart from its obvious toxicity.

General working temperature 4-15 degrees c.

Nothing more expensive than mercury (within reason).

Up to about 750kilos required.

Any advice would be appreciated.. Cheers  ;D

Offline Borek

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Re: what is the heaviest non-toxic (or almost) liquid
« Reply #7 on: May 07, 2008, 04:19:06 PM »
Have you tried googling for "heavy liquids"?
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Offline wetfoot

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Re: what is the heaviest non-toxic (or almost) liquid
« Reply #8 on: May 11, 2008, 03:56:45 PM »
Have you tried googling for "heavy liquids"?

Yes.. It did not help as my knowledge of chemistry isn't that great.

I am just not good at chemistry.. I though some 'nice' person here might have had some ideas off the top of their head seeing as I'm sure it is not that uncommon topic in chemistry..
« Last Edit: May 11, 2008, 06:44:20 PM by wetfoot »

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