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Textile Chemistry
Citric Acid Monohydrate
Formula:
C6H8O7*H2O
GOST/CAS:
CAS 5949-29-1
Citric Acid Monohydrate is an organic crystalline substance widely utilized in the textile industry as an efficient, eco-friendly agent for pH regulation, equipment cleaning, and dye fixation. The product comes in the form of colorless crystals or a white crystalline powder that is highly soluble in water. Thanks to its excellent chelating and buffering properties, it prevents staining during dyeing, neutralizes residual alkali after scouring and mercerization, and serves as a safe catalyst during final fabric finishing.
Applications
pH Regulation and Neutralization: Used for precise acidity control of dye and print baths. It effectively neutralizes residual alkali on cotton and blended fabrics following scouring, bleaching, and mercerization processes.
Dye Fixation and Finishing: Applied in the dyeing processes of wool, silk, and polyamide to enhance the exhaust rate of reactive and acid dyes. It functions as a non-toxic catalyst in durable press and easy-care finishing formulations for cellulosic fibers.
Scouring Intensification and Cleaning: Binds hardness ions Ca, Mg and traces of heavy metals Fe, preventing the formation of insoluble scale and deposits on fibers and equipment. It enhances color brightness and eliminates the risk of "iron stains".
Pre-treatment and Bleaching: Acts as a stabilizer for hydrogen peroxide bleaching baths within textile auxiliaries, ensuring a uniform white background without causing degradation to the cellulose structure.
Key Advantages
High Chelating Capacity: Effectively sequesters metal ions in process water, protecting textile materials from graying and maintaining the purity, vividness, and fixation of pigments.
Fiber Safety: Unlike harsh mineral acids (such as hydrochloric or sulfuric acids), it acts mildly, entirely eliminating the risk of hydrolytic damage or reduction in the tensile strength of natural and synthetic yarns.
Stability and Biodegradability: The product is fully biodegradable, non-toxic at working concentrations, and safe for textile effluent streams, significantly reducing the environmental load on wastewater treatment plants.
Excellent Solubility: Dissolves rapidly and completely in water at room temperature, guaranteeing homogeneous working solutions and leaving no mechanical impurities on the fabric.
Storage & Transportation
- Store in dry, cool, and well-ventilated warehouses in tightly sealed original packaging, away from heat sources and incompatible materials (alkalis, oxidizing agents).
- Recommended storage temperature should not exceed 30°C, with a relative humidity of no more than 70% (to prevent caking and lumping of the product).
- Protect from direct sunlight and moisture exposure.
- Transportable by all modes of covered transport in compliance with standard freight regulations. The product is not classified as a hazardous good.
- Shelf Life: 2–3 years from the date of manufacture (provided original packaging integrity is maintained).
Technical Specifications
Appearance
Colorless crystals or white crystalline powder
Molecular Weight
210.14 g/mol
Assay (Main Substance)
≥ 99.5%
Water Content
7,5-9,0%
pH (5% Aqueous Solution)
1,5-2,5
Sulfate Content
≤ 0.015%
Supply info
- Polypropylene or multi-wall paper bags with an inner polyethylene liner, 25 kg net weight.
- Flexible Intermediate Bulk Containers (Big-Bags) of 500–1000 kg for high-volume wholesale shipments.