Cheap liquid with Sp.Gravity betn. 2.8 to 6.5

[biren]

i am trying to find a liquid that is -

cheaply and easily available;
easy and safe to use - non-toxic, non-acidic;
usable at room temperatures;
with a viscosity less than 10 cp;
and specific gravity anywhere between 2.8 to 6.5...

please help?

thanks a bunch
warm regards
b.

 

[Borek]

No idea about viscosity, but I was browsing the site and found this thread: https://www.physicsforums.com/showthread.php?t=480357 - check if some of the solutions mentioned won't work for you.

 

[DrDu]

Sodium polytungstate solutions have a density of up to 3.10 at relatively low viscosity and non-toxic. Not exactly cheap, but probably the only liquid which is non-toxic in that density range:
http://www.geoliquids.com/geo_pdfs/msds_sp.pdf