-2
$\begingroup$
  1. What's the amount of Mercury and Thallium in a typical low-temperature thermalmeter?

  2. How poisonous is Thallium when bounded with Mercury?

$\endgroup$
3
$\begingroup$

The lowest eutectic in the Hg-Tl system occurs at 8.6 at.% Tl at 213K (see W. Gierlotka et al., CALPHAD 30425-430 (2006)). This is about 21K lower than the freezing point of pure Hg.

For toxicity, refer to an SDS (MSDS) or ask you local ES&H or industrial hygiene professional.

$\endgroup$

Not the answer you're looking for? Browse other questions tagged or ask your own question.