Kremer Borax - 100gr

• Chemical composition: Na2B4O710 H2O 
• Borax forms large, mostly white, more rarely blue, gray or green monoclinic holohedral crystals in nature. When crystallizing out of borax solutions, colorless crystals are formed which, when exposed to dry air, weather superficially to a white powder with loss of crystal water. The name borax comes from the Arabic word buraq. 
• Borax dissolves in water with alkaline reaction. Per 100gr of water, 2.8gr of borax dissolve at 0°C, 4.6gr at 10°C, 7.9gr at 20°C, 12gr at 30°C, 40.4gr at 60°C, 58gr at 70°C, 76gr at 80°C, 120gr at 90°C and 200gr at 100°C. Acidified with hydrochloric acid, the solution colors yellow curcuma paper brown, as some free boric acid is formed. Various hydrates can be prepared from borax by careful dehydration. If borax is heated to 350-400°C, the anhydrous sodium tetraborate (Na2B4O7) is formed. If, for example, some borax is held in the gas flame on a hot magnesia rod, it initially inflates with loss of water of crystallization. Later (at 878°C) it melts into a crystal clear bead in which various metal oxides with characteristic color dissolve. For example, chromium oxide gives an emerald green bead. 
• Occurrence: California (borax lakes of the Mohave Desert), Nevada, Tibet (in the Middle Ages, natural borax was imported from Tibet under the name Tinkal as a preciousness). The borax lakes contain besides larger amounts of borax also Glauber's salt, common salt, soda, etc. Probably their borax content is due to volcanic processes. 
• Application: To glazes for earthenware and porcelain wares, in enamel manufacture, to make lenses and temperature-resistant glasses, as a flux in brazing (dissolves interfering oxides), as an additive to soap (water-softening effect moderate), to stiffen fabrics, as an additive to tanning broths, to dissolve casein. 
• Properties: - odorless - easily soluble - easy to process 
• Cleaning of tools: Immediately after use with water.

Hazard designation

H319: Causes serious eye irritation.

H360Fd: Suspected of damaging fertility. May damage the unborn child.

Safety Information

P202: Do not handle until all safety precautions have been read and understood.

P264: Wash thoroughly after handling.

P280: Wear protective gloves/ clothing/ eye/ face protection.

P305+P351+P338: If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses and continue rinsing.

P308+P313: If exposed or concerned: Get medical advice/attention.

P501: Dispose of contents/ container according to regional, national and international regulations.