What is Ammonium Hydroxide

It is a colorless and strong-smelling liquid formed by a reaction between ammonia and water molecules. As a gaseous compound, it demonstrates decreased solubility in solvent solutions in direct proportion to the increasing temperature of the solvent. It also decreases in density as the concentration of dissolved ammonia increases. It’s important to exercise caution when unsealing containers for products with ammonium hydroxide as an ingredient that are stored at colder temperatures, as this can result in saturation that leads to a sudden burst of gas upon opening.

  • Synonyms: Ammonium hydroxide, ammonia, ammonia water, ammonia solution, aminocaproic acid, aqua ammonia, or spirit of hartshorn
  • INCI: Ammonium hydroxide
  • Chemical formula: NH4OH
  • CAS #: 1336-21-6
  • Hazard: 8, Corrosive Liquid


Use the links below to view all package sizes for these specific products:

Ammonium hydroxide 12% reagent
Ammonium hydroxide 18%
Ammonium hydroxide 19%

Product Specifications

Appearanceclear, colorless liquid
Odorstrong, pungent odor
Tastevery acrid taste
Solubilitiessoluble in water
Boiling point85°F (29.4°C)
Freezing point-104°F (-75.6°C)
Molecular weight35.046 g/mol
Weight per gallon7.4808 lbs/gal
GradeReagent, NSF, ACS, FCC, FG


Ammonium Hydroxide uses include as buffer, ceramics, cosmetics, detergents, fertilizers, hair bleaching, hair care, industrial and institutional cleaners, paints & coatings, photographic, textile, denaturant.

  • Automotive: It is used in vehicle care products such as tire inflators, fiberglass cleaners, polishes, and puncture seal products.
  • HI&I - Ammonium hydroxide is used in household cleaning products for bathroom fixtures, floors, glass and mirrors, carpets, and upholstery. It is often found in disinfectants and stain removers.
  • Personal Care: It is used in shaving creams, skin lotions, and acne treatments, as well as cosmetics such as eyelash colorants and mascara and hair care products including glazes, colorants, and touch-up kits.
  • Others: Other products containing the chemical can include explosives, fertilizers, plastics, and refrigerants, as well as home maintenance items like finish removers and crack and seam sealers.

Quick Answers

It is a colorless and strong-smelling liquid formed by a reaction between ammonia and water molecules. It is also referred to as ammonia, ammonia water, ammonia solution, or spirit of hartshorn. Although highly toxic, ammonium hydroxide serves many useful purposes in various manufacturing applications in industries such as pharmaceutical, household cleaning products, personal care products, and many others.

If you’re looking for where to buy ammonium hydroxide in the United States, look no further than Brenntag North America. We carry a wide selection of high-quality products for every manufacturing application, and our conveniently located distribution centers ensure fast and convenient shipment to your facility.

Ammonium hydroxide is available in drum, tote, and bulk quantities.

You can download a copy of the SDS for ammonium hydroxide from Brenntag Connect.

Download the SDS now.

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