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Textile Chemistry
Acetic Acid 70%
Formula:
CH₃CO₂H
GOST/CAS:
CAS 64-19-7
Acetic Acid 70% (a weak solution of ethanoic acid) is a highly efficient chemical component widely used in the textile and light industries as a pH regulator, neutralizer, and dye fixative. The product is a clear, colorless liquid with a characteristic pungent odor and is completely miscible with water. Thanks to its optimal concentration, it ensures mild and uniform adjustments to the pH level of technological mediums, which is critically important for protecting fibers from degradation and achieving pristine dyeing quality.
Applications
Neutralization of Alkaline Mediums: Used for the effective neutralization of residual alkali on fabrics after mercerization, scouring, and bleaching processes, preparing the material for subsequent finishing stages.
Fiber Dyeing and Fixation: Serves as a key agent for regulating pH in dye baths when dyeing wool, silk, polyamide, and blended fabrics with acid and reactive dyes. It ensures uniform dye uptake and robust color fixation.
Textile Printing: Utilized in the formulation of printing pastes for textile printing, promoting optimal fixation of pigments onto fibers and preventing the pattern from "bleeding" or smudging.
Mordanting in Dyeing: Acts as a mordant, improving the affinity of specific dye types with textile fibers and increasing color fastness against washing, light, and rubbing.
Key Advantages
Precise pH Control and Mild Action: Unlike strong mineral acids, 70% acetic acid acts gently, eliminating the risk of damaging the structure of both natural (cotton, wool, silk) and synthetic fibers.
Dyeing Uniformity: Provides a smooth reduction or stabilization of pH in the bath, which guarantees a consistent, deep, and level dye yield across the textile fabric without shading or spot defects.
High Volatility During Drying: The acid evaporates easily during subsequent heat treatment and fabric drying, leaving no unwanted salt residues or foreign odors on the material.
Eco-Friendly and Biodegradable: The product is fully biodegradable and does not accumulate in the environment. Wastewater generated after neutralization is easily processed by standard biological treatment plants.
Storage & Transportation
- Store in dry, cool, and well-ventilated warehouse facilities in tightly sealed original packaging, away from heat sources, sparks, and open flames. Do not store together with strong alkalis and oxidizing agents.
- Recommended storage temperature range: +5°C to +35°C. If the temperature drops below -16°C, the product may partially crystallize (freeze); after gentle warming, it fully restores its properties without any loss of quality.
- Avoid exposure to direct sunlight and prolonged moisture impact on the packaging containers.
- Transportation is permitted by all modes of covered transport in accordance with the dangerous goods regulations applicable to each transport type (classified as a moderately hazardous, corrosive substance). Shelf life is 1 year from the date of manufacture.
Technical Specifications
Appearance
Clear, colorless liquid free from mechanical impurities, with a pungent odor
Molecular Weight
60.05 g/mol
Mass Fraction of Main Substance
70.0±1.0%
Density (at 20°C)
~ 1.068 – 1.070 g/cm³
pH (10% aqueous solution)
2.0 – 3.0
Freezing Point
Approximately -16°C to -18°C
Supply info
- Industrial plastic IBC containers weighing 1000–1050 kg.
- Polyethylene jerrycans available in 20, 30, or 50 liters.
- Bulk delivery via chemical road tankers is available for large wholesale orders upon agreement.