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The red liquid in a liquid-in-glass thermometer is mineral spirits or ethanol alcohol mixed with red dye. A grey or silver liquid inside the thermometer is Mercury. Mercury thermometers are not used anymore due to the dangers associated with mercury.

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Wiki User

14y ago
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Wiki User

12y ago

The red liquid in thermometers is actually alcohol. A dye is added to help the user see it. Hence the red colour.

The silver liquid seen in some thermometers is mercury. However mercury is very toxic and so in a number of countries in the world they are either now banned for sale to the public or not recommended for home or medical use.

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Wiki User

14y ago

Mercury

the liquid inside thermometer is mercury.. but it is called thermometric liquid.
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Doc Lexington

Lvl 1
2y ago
It is not mercury which is silver in color. It is red-dyed alcohol or mineral spirits.

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Wiki User

11y ago

what is the red liquid in the thermometer called

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Wiki User

12y ago

They originally used mercury. Although I can't remember wbat they use today.

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Wiki User

13y ago

mercury

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Q: What is the name of the liquid in a thermometer?
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