1.1 General information

Ammonia Hydroxide (NH4OH).

Ammonium Hydroxide is a product resulting from the dissolution of Anhydrous Ammonia (NH3 - gas) in water at varying concentrations, depending on the intended use of the product.

It presents the following chemical reaction:

NH3 + H20 = NH4OH

This reaction is extremely exothermic and reversible. Colorless liquid with a strong characteristic odor of Anhydrous Ammonia, it produces white vapors when in contact with hydrochloric acid. It is treated similarly to Anhydrous Ammonia in terms of Occupational Toxicology aspects.

1.2 Synonyms

Ammonia

Ammonia Solution

Ammonia Water

Ammonia Hydroxide

NH4OH (chemical formula)

1.3 Technical Sheet

Risk number = 80

UN number = 2672

Risk Class or Subclass = 8 (Weak Alkaline Solution)

Description of the risk class or subclass = Corrosive

2.1 Dangerous data

Typical L.P.O. content: 46.8 ppm limit

Nitrogen Trihydride (NH3) 24, 25, 26 and 29 P.P.: 0.5 mg/l of Nitrogen Water (H2O) 76, 75, 74, and 74 LT: Brazil - 30 ppm Ceiling Value.

2.2 Specific conditions

Since the reaction of Ammonium Hydroxide is extremely reversible, the reactivity data are the same as for Anhydrous Ammonia (NH3).

1. a) Stability/Polymerization: Anhydrous Ammonia is stable when stored and used under normal storage and handling conditions. Above 450 °C, it can decompose, releasing nitrogen and hydrogen, and polymerization does not occur.
2. b) Chemical Incompatibility: It is an alkaline solution that emits heat when reacting with acid. In contact with halogens, boron, 1,2-dichloroethane, ethylene oxide, platinum, nitrogen trichloride, and strong oxidants, it can cause potentially violent or explosive reactions. In contact with heavy metals and their compounds, it can form explosive products; in contact with chlorine and its compounds, it can result in the release of chloramine gas. Ammonia produces a significant explosive mixture when in contact with hydrocarbons. The product is also incompatible with acetaldehyde, acrolein, hydrazine, potassium ferrocyanide.

Hazardous Decomposition Products: Thermal decomposition of NH3 can produce toxic nitrous gases.

* Molecular Weight: 35.03 g/mol

* Boiling Point: ND

* Melting Point: ND

* Critical Temperature: ND

* Critical Pressure: ND

* Density: 0.895 g/mol at 0.905 g/mol at 1 atm.

* Vapor Density: ND

* Vapor Pressure:  ND

* Latent Heat of Vaporization: ND

* Heat of Combustion: ND

* Solubility in Water: Miscible

* Viscosity: ND

* Chemical Reactivity with Water: Dissolves with gentle heating effect

* Common Materials: Corrosive to Copper, Zinc, Silver and Ag Alloys.

* Polymerization: NA

* Others: NA

* Concentration Potential in the Food Chain: None

* Biochemical Oxygen Demand (BOD): NA

* Neutralization and Final Disposal: Place in a container with water, neutralize with H2O, and drain into the sewer with sufficient water.

The storage temperature is similar to ambient temperature for Anhydrous Ammonia, presenting low temperature at ambient pressure. It is typically packaged in plastic drums and/or plastic containers (containers) or carbon steel or stainless steel tank cars. If in containers, transportation should not be done in closed trucks or vans. It is stable during transport as long as there is no prolonged exposure to the sun.