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Textile Chemistry
Aqua Ammonia 25%
Formula:
NH₃·H₂O
GOST/CAS:
GOST 9-92 / CAS 1336-21-6
Aqua Ammonia 25% (Aqueous Ammonia, Ammonium Hydroxide Solution) is a highly efficient chemical component widely used across various stages of textile processing, including fabric preparation, dyeing, and finishing. Exhibiting strong alkaline properties, it serves as an excellent pH regulator and a mild neutralizing agent. Due to its high volatility, the product completely evaporates during the drying process, leaving no unwanted salts or dry residues on the fibers. This characteristic is critical for preserving the natural softness, texture, and quality of the finished textile materials.
Applications
Dyeing and Textile Printing: Functions as a pH regulator and fixing agent when dyeing wool, silk, and blended fabrics with reactive, direct, and acid dyes. It ensures uniform pigment penetration deep into the fibers and prevents splotches or uneven coloring.
Textile Finishing and Appretisage: Applied during the mercerization of cotton materials to enhance luster, tensile strength, and hygroscopicity. It is also incorporated into finishing formulations to reduce fabric shrinkage.
Fiber Scouring and Washing: Effectively removes natural fats, waxes, oily soils, and sizing agents from greige fabrics prior to bleaching or dyeing, without compromising the structural integrity of natural fibers.
Synthetic Fiber Production: Utilized as a catalyst and reagent in the synthesis of polymers, capron, and nylon, as well as in the manufacturing of cuprammonium rayon (cupro).
Key Advantages
Residue-Free pH Regulation: Unlike fixed inorganic alkalis (such as caustic soda), it volatilizes completely during drying, eliminating any risk of subsequent fiber degradation or shade alteration.
Excellent Leveling Ability: Facilitates exceptionally uniform dye application across the entire surface of the fabric, preventing common shading and listing defects.
Gentle Fiber Treatment: Softly breaks down greasy impurities and conditions the capillary structure of the fabric for optimal dye absorption, preserving the material's elasticity and soft hand-feel.
Efficient Neutralization: Rapidly and safely neutralizes residual acids remaining on fabrics after acid scouring or the carbonization of wool.
Storage & Transportation
- Store in tightly closed original packaging in cool, dry, and well-ventilated warehouses equipped with supply and exhaust ventilation systems.
- Avoid exposure to direct sunlight, heat sources, and open flames (heating releases flammable and toxic ammonia gas).
- Do not store concurrently with acids, strong oxidizers, or halogens.
- Transport is permissible via all modes of covered transport in strict compliance with dangerous goods regulations (classified under Hazard Class 8 — Corrosive substances).
- Guaranteed shelf life — 1 year from the date of manufacture.
Technical Specifications
Appearance
Clear, colorless liquid with a pungent, characteristic odor
Molecular Weight
35.05 g/mol
Assay
≥ 25.0%
Density (at 20°C)
0.901 – 0.907 g/cm³
pH (aqueous solution)
11.5 – 12.5 (Strongly alkaline)
Residue after evaporation
≤ 0.07%
Supply info
- Industrial plastic IBC totes (Intermediate Bulk Containers) containing 900–1000 kg.
- Polyethylene jerricans of 10, 20, or 30 liters.
- Available for bulk delivery via road tankers for large wholesale orders.