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Ammonium hydroxide

CAS Number
1336-21-6
EC Number
215-647-6
Chemical Formula
H5NO
Molecular Weight
35.046 g/mol

Description

Ammonium hydroxide (CAS 1336-21-6 ), also sold as ammonia water and designated E527 in food-grade applications, is an aqueous solution of ammonia used industrially as an alkaline reagent and pH control agent. It functions across cleaning, processing, and treatment operations where a fast-acting, readily soluble base is required. In water treatment, it adjusts pH and supports chloramine disinfection in municipal systems. Textile, leather, and paper processing rely on it to neutralize acids, swell fibers, and condition pulp during wet processing stages. Industrial and household cleaning formulations use it to cut through grease and protein-based soils. In rubber compounding, it acts as a stabilizer for latex dispersions, preventing premature coagulation during transport and storage. This ensures the material remains stable during long-term industrial transport and storage. Ammonium hydroxide is supplied as an aqueous solution, with concentration typically ranging from 25% to 30% ammonia by weight for industrial supply. This high concentration allows for efficient dilution in various processes. Food-grade material conforming to E527 specifications is available for permitted food processing applications. Technical-grade solutions are the standard for water treatment, cleaning, and industrial processing uses. Contact us for supply of Ammonium hydroxide Request Quote

Other Names (Synonyms)

Ammonia water | Ammonia aqueous | Ammonia, aqua | Household ammonia | Ammonia, monohydrate | Ammonium hydroxide ((NH4)(OH)) | Aqua ammonia | E527

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

Physical Properties

Melting Point-77°C
Boiling Point38 °C
Density~0.90 g/cm³ (approx) @ Temp: 25 °C
AppearanceAmmonium Hydroxide is a colorless to milkywhite solution of ammonia, with a strong, irritating odor.
ColorColorless
OdorStrong pungent ammonia odor detectable at 17 ppm
FormLiquid, Single Sub-Boiling Quartz Distillation
Water SolubilityMiscible with water.
Vapor Pressure115 mmHg at 20 °C for 29% solution
pH10.09(1 mM solution)
10.61(10 mM solution)
11.12(100 mM solution)

Safety & Handling

Danger
GHS05· CorrosiveGHS09· EnvironmentGHS07· IrritantGHS08· Health HazardGHS06· Toxic

Hazard Statements

H290May be corrosive to metals
H302Harmful if swallowed
H314Causes severe skin burns and eye damage
H318Causes serious eye damage
H331Toxic if inhaled
H335May cause respiratory irritation
H370Causes damage to organs
H371May cause damage to organs
H373May causes damage to organs through prolonged or repeated exposure
H400Very toxic to aquatic life
H401Toxic to aquatic life
H402Harmful to aquatic life

Precautionary Statements

P234Keep only in original packaging.
P260Do not breathe dust/fume/gas/mist/vapours/spray.
P261Avoid breathing dust/fume/gas/mist/vapours/spray.
P264Wash … thoroughly after handling.
P270Do not eat, drink or smoke when using this product.
P271Use only outdoors or in a well-ventilated area.
P273Avoid release to the environment.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P316Get emergency medical help immediately.
P317Get emergency medical help.
P319Get medical advice/attention if you feel unwell.
P321Specific treatment (see … on this label).
P330Rinse mouth.
P363Wash contaminated clothing before reuse.
P390Absorb spillage to prevent material damage.
P391Collect spillage.
P405Store locked up.
P406Store in a corrosion-resistant/… container with a resistant inner liner.
P501Dispose of contents/container in accordance with local regulations.
P265Wash … thoroughly after handling.
P317Get emergency medical help.
P340IF INHALED: Remove person to fresh air and keep comfortable for breathing.
P316Get emergency medical help immediately.
P233Store in a well-ventilated place. Keep container tightly closed.
P331Rinse mouth. Do NOT induce vomiting.
P354IF ON SKIN: Take off immediately all contaminated clothing. Rinse skin with water/shower.
P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

Trade & Regulatory

HS Code28142000
UN Number2672
ADR Class8
Packing GroupIII
WGK (Germany)2