Ammonia.jpg Ammonia.jpg

Ammonia|Hydrogen nitride

CAS Registry Number (CASRN):

7664-41-7 ,

Units of original limits:

ppm ,

Conc dep:

Y ,

name:

Ammonia|Hydrogen nitride ,

formula:

NH3 ,

CAS Registry Number (CASRN):

7664-41-7 ,

SAX Number:

5138Q19F1X ,

Units of original limits:

ppm ,

Conc dep:

Y ,

p to m:

0.696448 ,

HR:

3 ,

state at 25 °C:

G ,

Molar mass (g/mol):

17.031 ,

Density (g/cm3):

0.86 ,

Melting point (°C):

−۷۷٫۷۳ ,

Boiling point (°C):

‎−33.34 ,

Acidity (pKa):

4.75 ,

solubility in water (g/100g):

32.5 ,

comment

Ammonia

Ammonia is a compound of nitrogen and hydrogen with the formula NH3. The simplest pnictogen hydride, ammonia is a colourless gas with a characteristic pungent smell. It contributes significantly to the nutritional needs of terrestrial organisms by serving as a precursor to food and fertilizers. Ammonia, either directly or indirectly, is also a building block for the synthesis of many pharmaceutical products and is used in many commercial cleaning products. Although common in nature and in wide use, ammonia is both caustic and hazardous in its concentrated form. It is classified as an extremely hazardous substance in the United States as defined in Section 302 of the U.S. Emergency Planning and Community Right-to-Know Act (42 U.S.C. 11002), and is subject to strict reporting requirements by facilities which produce, store, or use it in significant quantities.

The global industrial production of ammonia in 2014 was 176 million tones a 16% increase over the 2006 global industrial production of 152 million tonnes.NH3 boils at −33.34 °C at a pressure of one atmosphere, so the liquid must be stored under pressure or at low temperature .It is easily liquefied due to the strong hydrogen bonding between molecules. Ammonia freezes at −77.7 °C (−107.86 °F) to white crystals. Ammonia may be conveniently deodorized by reacting it with either sodium bicarbonate or acetic acid. Both of these reactions form an odorless ammonium salt.

Ammonia is miscible with water. In an aqueous solution, it can be expelled by boiling. The aqueous solution of ammonia is basic. The maximum concentration of ammonia in water (a saturated solution) has a density of 0.880 g/cm3 and is often known as '.880 ammonia'. Ammonia does not burn readily or sustain combustion, except under narrow fuel-to-air mixtures of 15–25% air.When mixed with oxygen, it burns with a pale yellowish-green flame. At high temperature and in the presence of a suitable catalyst, ammonia is decomposed into its constituent elements. Ignition occurs when chlorine is passed into ammonia, forming nitrogen and hydrogen chloride; if chlorine is present in excess, then the highly explosive nitrogen trichloride (NCl3) is also formed.

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