arsenic trioxide

American  

noun

Chemistry.

1. a white, tasteless, amorphous, slightly water-soluble, poisonous powder, As 2 O 3 , used chiefly in the manufacture of pigments and glass and as an insecticide or weed-killer; arsenous acid.

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arsenic trioxide British  

noun

1. Also called: arsenic.  a white poisonous powder used in the manufacture of glass and as an insecticide, rat poison, and weedkiller. Formula: As 2 O 3

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Example Sentences

In the form of arsenic trioxide, it can be used to treat acute promyelocytic leukemia, the book says.

From Washington Post • Jun. 10, 2013

Arsenic trichloride, when mixed with enough water, breaks down into arsenic trioxide and hydrochloric acid in a chemical reaction that increases its corrosive properties.

From Time Magazine Archive

Glauber showed how to prepare hydrochloric acid, spiritus salis, by heating rock-salt with sulphuric acid, the method in common use to-day; and also nitric acid from saltpetre and arsenic trioxide.

From Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" by Various

It is easily oxidized by heating with concentrated nitric acid to arsenic acid, and with concentrated sulphuric acid to arsenic trioxide; dilute nitric acid only oxidizes it to arsenious acid.

From Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 6 "Armour Plates" to "Arundel, Earls of" by Various

It is combustible, burning with a pale bluish-white flame to form arsenic trioxide and water when air is in excess: 2AsH3 + 6O = As2O3 + 3H2O.

From An Elementary Study of Chemistry by McPherson, William