Borax 5 hydrate sodium tetraborate 1 kg

One Mineral Powder, Countless Jobs Across Industry and Home Workshops

Borax pentahydrate, chemically known as sodium tetraborate, is one of the most searched mineral reagents worldwide, and its popularity comes from a genuinely wide range of industries rather than a single niche use. This product belongs to the category Acids, Salts, Alcohols, and Alkalis, which brings together reagents for pH adjustment, cleaning formulations, and industrial processing. That breadth of use is exactly why borax appears in everything from glassworks to small craft studios.

The largest global demand for sodium tetraborate comes from the glass and ceramics industry, where it acts as a flux that lowers the melting point of batch materials and improves glaze flow and adhesion. In metalworking, borax has long served as a soldering flux for silver, copper, and brass, dissolving oxide layers and allowing clean, strong joints without porosity. The detergent and household cleaning sector relies on borax as a water softener and booster in laundry powders, mold removers, and descaling products. Agriculture uses it as a source of boron, a trace element essential for root development and fruit set, typically applied as a diluted foliar solution.

Wood treatment is another significant field: soaking timber in a borax solution protects it against wood-boring insects, fungus, and mold, which matters greatly in furniture making and construction. On the craft and household side, borax remains the classic base ingredient for slime recipes, crystal-growing projects, and homemade cleaning pastes for ovens and bathroom fixtures.

Sodium tetraborate pairs well with other reagents from the acids and alkalis category. In laboratory or cosmetic formulations it is sometimes combined with organic acids, such as Succinic Acid, for gentle pH correction, or with Oleic Acid when building emulsifying systems based on a fatty acid borate soap. Mixing it with strong mineral acids, including Nitric Acid, requires caution, since the reaction releases heat and forms boric acid, so this should only be done in a ventilated area with gloves and eye protection.

Dosage depends on the application: household cleaning solutions typically use 20-40 g per liter of warm water, wood preservation solutions are prepared at roughly 300-400 g per 10 liters of water, and ceramic glaze formulas vary by recipe, often starting around 5-15 g per batch. The powder dissolves noticeably faster in water heated to 40-60 degrees Celsius. Store borax in a dry, tightly sealed container at room temperature, away from moisture, direct sunlight, and food products, and keep it out of reach of children and pets. The 1 kg pack size suits home crafters, small workshop studios, and small-batch production runs, offering enough supply for repeated projects without excessive storage volume.

Soldering Flux Paste for Silver Jewelry

Borax sodium tetraborate 60 g

Distilled water 35 ml

Glycerin 15 ml

Dissolve the borax powder gradually into warm water while stirring continuously until fully clear, then blend in the glycerin in small amounts until the mixture becomes a smooth, thick paste. Apply a thin layer to the joint area right before soldering, and store any leftover paste in a sealed glass jar for no longer than a few weeks, since it can dry out and lose its working consistency over time.