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Textile Chemistry
Soda Ash Dense/Light 99.4% (Sodium Carbonate)
Formula:
Na2CO3
GOST/CAS:
CAS 497-19-8 / ГОСТ 5100-85
Soda Ash 99.4% (sodium carbonate) is a high-purity inorganic compound that comes in the form of a white crystalline powder or granules. It possesses strong alkaline properties and excellent solubility in water. In the textile industry, it serves as an indispensable processing agent, establishing the optimal pH level and ensuring the efficiency of preparation, scouring, bleaching, and dyeing processes for both natural and synthetic fibers.
Applications
Dyeing and Dye Fixation: Used to create the essential alkaline environment required for fixing reactive dyes onto cotton and other cellulosic fibers. It ensures a robust chemical bond between the dye and the fabric, resulting in vibrant, wash-fast colors.
Textile Scouring and Preparation: Applied during the boiling/scouring stage of cotton and linen fabrics to effectively eliminate natural impurities (waxes, fats, pectins, and seed coat fragments), thereby enhancing fabric wettability and capillarity.
Washing and Neutralization: Efficiently neutralizes residual acids following acid treatments and assists in washing off unfixed, excess dyes during the final finishing stages.
Process Water Softening: Binds calcium and magnesium ions to prevent the formation of insoluble salts, which could otherwise compromise finishing quality and lead to uneven, patchy dyeing.
Key Advantages
High Chemical Purity (99.4%): Minimal trace impurities (including iron and chlorides) guarantee that no undesirable chemical side-reactions, staining, or shade alterations occur on sensitive fabrics.
Excellent Buffering Capacity: Consistently maintains the target alkalinity in the dye bath, which is critical for achieving reproducible color results from batch to batch.
High Solubility: Dissolves rapidly and completely in water without leaving sediment, preventing the clogging of nozzles and dye machine components.
Safe and Eco-Friendly: Does not emit toxic volatile organic compounds (VOCs), is biodegradable in wastewater systems after standard neutralization, and is perfectly safe for fibers when used according to standard technological guidelines.
Storage & Transportation
- Store in dry, enclosed, and well-ventilated warehouse spaces that are fully protected from moisture, humidity, and precipitation.
- Prevent damage to the packaging; the product is highly hygroscopic and will absorb moisture and carbon dioxide from the air, causing it to cake.
- Keep stored separately from acids and acidic compounds to avoid a vigorous chemical reaction accompanied by the release of carbon dioxide gas.
- Guaranteed shelf life is 1 year from the date of manufacture. The product is classified as non-hazardous for transport.
Technical Specifications
Appearance
White crystalline powder or granules
Main Substance Assay
≥ 99.4%
Chloride Content
≤ 0.2%
Iron Content
≤ 0.003%
pH (1% aqueous solution)
11.5 – 11.6
Solubility in Water (at 20°C)
~215 g/L
Supply info
- Standard 25 kg polypropylene bags with an inner polyethylene liner to provide superior moisture protection.
- Specialized flexible intermediate bulk containers (FIBC / Big-Bags) of 1000 kg or 1250 kg tailored for large-scale industrial consumers.
- Deliveries can be made via all types of covered transport in strict compliance with standard freight regulations.