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Severe arsenic poisoning may cause swelling or a loss of blood flow to the tongue, or pigmentation changes in the mouth. Other health issues that can cause the tongue discoloration include poor oral hygiene, glossitis, anemia or B-vitamin deficiency.
Consuming products like Pepto-Bismol is a common cause of a dark-colored tongue, this happens because the bismuth interacts with saliva to form a harmless black substance called bismuth sulfide.

List of fictional toxins - Wikipedia

en.wikipedia.org/wiki/List_of_fictional_toxins

This is a list of toxins, poisons, chemical weapons and biological weapons from works of fiction ... There is an indicator that turns blue in the presence of atroquinine. ... Dark Water, Slugterra, ...

What famous poison turns your tongue black - Answers.com

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Arsenic is the famous poison that turns your tongue black.

What poisonus element turns your tongue black - Answers.com

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bromine is a famous element that was used as poisonus gas also arsenic was used it is a more ... Arsenic is the famous poison that turns your tongue black.

Periodic Table Crossword - Science-Teachers.com

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14 Poison gas in WWI. (8). 15 A famous poison that turns your tongue black. (7). 17 A metal sought after during the Klondike. (4). 18 The element diamonds are ...

What causes a black tongue? | Reference.com

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Excess bacteria or growth of yeast in the mouth causes black hairy tongue, ... A Famous Poison That Turns Your Tongue Black · Symptoms Black Tongue · Black  ...

What is the component of gunpowder that smells like rotten eggs ...

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What are the components of black powder? ... A Famous Poison That Turns Your Tongue Black · Poison Gas in WW1 · A Metal Used in Wires · Element Used to ...

What are some reasons for a black tongue? | Reference.com

www.reference.com/health/reasons-black-tongue-f1a99311e8d3809

Other causes of a black tongue are bad oral hygiene, taking medicines. ... Tongue · Black Tongue in Humans · A Famous Poison That Turns Your Tongue Black ...

i need help with elements? | Yahoo Answers

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Inert gas used to make bright city gas? a component of gunpowder that smells like rotten eggs? a famous poison that turns your tongue black?

Quotes About Tongue (112 quotes) - Goodreads

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For we use it both to taste out sweet wine and bitter poison, thu... ... “The best time for you to hold your tongue is the time you feel you must say .... “I resisted the temptation to turn around and stick out my tongue in derision at Beliquose. After all ...