Anhydrous ammonia is a colorless liquid with a strong pungent odor. Ammonia, as an important chemical raw material, is usually obtained in liquid form by pressurizing or cooling gaseous ammonia gas for convenient transportation and storage. Ammonia is easily soluble in water and forms an alkaline solution of ammonium hydroxide when dissolved in water. Liquid ammonia is mostly stored in pressure resistant steel cylinders or tanks and cannot coexist with substances such as acetaldehyde, acrolein, boron, etc. Liquid ammonia is widely used in industry, with corrosiveness and easy volatilization, resulting in a high incidence of chemical accidents.

Basic Introduction:

English name Liquid ammonia (anhydrous ammonia)

Structure and molecular formula NH3

The production method involves synthesizing ammonia gas and compressing it to produce liquid ammonia products.

Product performance: Liquid ammonia is a colorless liquid with a strong pungent odor and is easily vaporized into gaseous ammonia. Density 0.617g/cm3; The boiling point is -33.5 ℃, and below -77.7 ℃, it can become a colorless crystal with a foul odor. [1]

Physical and chemical properties:

Molecular formula: NH3 gas ammonia relative density (air=1): 0.59 Molecular weight: 17.04 Liquid ammonia relative density (water=1): 0.602824 (25 ℃)

CAS number: 7664-41-7 Spontaneous combustion point: 651.11 ℃

Dangerous Goods Number: 23003 Molecular Weight: 17.03

Melting point (℃): -77.7 Explosion limit: 16% to 25%

Boiling point (℃): -33.4 1% aqueous solution pH: 11.7

Specific heat kJ (kg · K) ammonia (liquid) 4.609 ammonia (gas) 2.179

Vapor pressure: 882kPa (20 ℃)

Existence of self ionization: 2NH3 ↔NH4+ +NH2-

Therefore, in liquid ammonia, NH4Cl is an acid and NaNH2 is a base