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Ammonia solution

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Ammonia solutions, often referred to as aqueous ammonia or ammonium hydroxide, are clear, colorless liquids consisting of ammonia gas dissolved in water. The concentration of ammonia in these solutions typically ranges from 5% to 35% by weight. Ammonia solutions possess a pungent odor characteristic of ammonia gas and are alkaline with a pH typically between 11 and 12.5. This solution is widely used across various industries due to its excellent cleaning properties, reactivity, and role as a nitrogen source.

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Categories: Fertilizers, pH Adjusters, Surfactants(cleaning) Tags: Ammonia solutions, Fertilizer production, Industrial Cleaning Agent, pH control agent, Water treatment chemical

Description

Table of Contents

Ammonia solution

Primary Uses

Industrial Cleaning & Degreasing

Ammonia solutions are extensively used as a powerful cleaning and degreasing agent in industrial, commercial, and residential environments.
Commonly employed for cleaning glass, stainless steel, ceramic tiles, and hard surfaces because of its ability to dissolve grease and grime without leaving residue.
Used in food processing plants and dairies to sanitize equipment due to its antimicrobial properties.

Agriculture & Fertilizers

Serves as a vital nitrogen source in fertilizers (liquid fertilizers, ammonium nitrate production) promoting plant growth and soil enrichment.
Used to adjust soil pH in certain agricultural practices.
Acts as a precursor to other nitrogen-containing fertilizers like urea and ammonium sulfate.

Chemical Manufacturing

Used as a reagent in the production of various chemicals, including explosives, plastics, dyes, and pharmaceuticals.
Essential in the manufacture of ammonium salts, cleaning agents, and neutralizing acidic waste streams.

Water Treatment

Applied in municipal and industrial water treatment plants as a pH adjuster and to help remove organic contaminants.
Used in chloramination processes to disinfect water by forming chloramines, a more stable disinfectant than chlorine alone.

Refrigeration Systems

Ammonia solutions are used as an intermediate in the production of anhydrous ammonia for industrial refrigeration systems, especially in food storage and processing plants.

Secondary Uses

Household Cleaners

Found in some household cleaning products for windows, kitchens, and bathrooms due to its effective grease-cutting and odor-neutralizing capabilities.

Textile Industry

Utilized in textile processing, particularly in the mercerization of cotton which improves fabric strength, luster, and dye uptake.
Helps in neutralizing and cleaning residues during fabric finishing.

Pharmaceutical Applications

Used in the synthesis of certain pharmaceuticals as a reactant or pH adjuster.
Occasionally used in lab reagent preparations and diagnostics.

Food Industry

Used sparingly and carefully as a food additive (E527) mainly in the baking industry as a leavening agent or pH regulator, though concentration and use are strictly regulated due to toxicity concerns.

Laboratory Uses

Employed as a reagent or solvent in analytical chemistry and qualitative inorganic analysis.
Used for ammonia vapor generation in laboratory settings.

Leather Industry

Used in tanning and leather processing to help remove unwanted fats and proteins and to soften hides.

KEY PRODUCT FEATURES

1. Basic Identification Attributes

Chemical Name (IUPAC): Ammonium hydroxide solution
Common/Trade Names: Ammonia solution, Aqueous ammonia, Ammonium hydroxide
CAS Number: 1336-21-6
HS Code: 2814.10.00
Molecular Formula: NH3·H2O (variable depending on concentration)
Synonyms: Ammonium hydroxide, Ammonia water, Aqua ammonia

2. Physical & Chemical Properties

Physical State: Clear, colorless liquid
Odor: Strong, pungent ammonia odor
Melting Point: Approx. -77.7°C (for pure ammonia) — aqueous solution freezes around -50°C depending on concentration
Boiling Point: Varies with concentration; ~37°C (for 30% solution)
Density: ~0.90-0.95 g/cm³ (depending on concentration)
Solubility: Completely miscible with water (it is water solution)
pH Level: Typically 11–12.5 (alkaline)
Vapor Pressure: High (due to ammonia volatility)
Flash Point: Non-flammable
Autoignition Temperature: N/A

3. Safety & Hazard Attributes

Hazard Class (GHS): Corrosive to skin and eyes; hazardous to respiratory system
NFPA Ratings: Health 3, Flammability 1, Reactivity 0
Exposure Limits: OSHA PEL = 50 ppm (8-hour TWA), ACGIH TLV = 25 ppm
Reactivity: Reacts vigorously with acids, halogens, and oxidizers
Incompatible Materials: Strong acids, halogens, chlorine bleach, copper, silver, mercury

4. Storage & Handling Attributes

Storage Conditions: Store in cool, well-ventilated, dry area away from incompatible materials and direct sunlight. Containers must be tightly closed.
Container Type: Typically stored in corrosion-resistant steel or polyethylene containers.
Shelf Life: Stable for 1-2 years under proper storage.
Special Handling: Use proper PPE including gloves, goggles, and respirators; avoid inhaling vapors; ensure good ventilation.

5. Regulatory & Compliance Attributes

Regulatory Status: Classified as hazardous; regulated by OSHA, EPA, and other agencies.
Transportation: Classified as hazardous material; subject to DOT regulations (UN2672).
Waste Disposal: Dispose of per local hazardous waste regulations; neutralize before disposal if possible.

6. Environmental & Health Impact

Ecotoxicity: Toxic to aquatic life; can cause environmental harm if released in large quantities.
Persistence: Ammonia volatilizes rapidly but is toxic in water at high levels.
Carcinogenicity: Not classified as carcinogenic.
Biodegradability: Biodegradable but can disrupt aquatic ecosystems if spilled.

SAFETY HANDLING PRECAUTIONS

Safety Handling Precautions

PPE: Wear chemical-resistant gloves, eye protection, and protective clothing. Use respiratory protection if ventilation is inadequate.
Handling: Handle in well-ventilated areas. Avoid inhalation of vapors and contact with skin/eyes.
Storage: Store in tightly closed containers, away from acids and oxidizers.
Hygiene: Wash hands thoroughly after handling; do not eat, drink, or smoke in work areas.

First Aid Measures

Inhalation: Move person to fresh air immediately; if breathing is difficult, give oxygen and seek medical attention.
Skin Contact: Rinse skin immediately with plenty of water for at least 15 minutes; remove contaminated clothing; get medical help if irritation persists.
Eye Contact: Rinse eyes with water for at least 15 minutes; seek urgent medical attention due to corrosive potential.
Ingestion: Do NOT induce vomiting; rinse mouth and drink plenty of water; seek emergency medical help immediately.

Firefighting Measures

Fire Hazards: Non-flammable but may release toxic ammonia vapors when heated.
Extinguishing Media: Use water spray, dry chemical, foam, or CO₂ on surrounding fire.
Precautions: Firefighters should wear full protective gear and self-contained breathing apparatus due to ammonia vapor toxicity. Cool containers with water spray.