borax


Also found in: Dictionary, Thesaurus, Medical, Financial, Wikipedia.
Related to borax: boric acid

borax

or

sodium tetraborate decahydrate

(sō`dēəm tĕ'trəbôr`āt dĕk'əhī`drāt), chemical compound, Na2B4O7·10H2O; sp. gr. 1.73; slightly soluble in cold water; very soluble in hot water; insoluble in acids. Borax is a colorless, monoclinic crystalline salt; it also occurs as a white powder. It readily effloresces, especially on heating. It loses all water of hydration when heated above 320°C; and fuses when heated above 740°C;; a "borax bead" so formed is used in chemical analysis (see bead testbead test,
test used in the identification of certain metals. Some metallic ions that cannot be identified by a flame test are identified by a bead test. The test can also be used to confirm the results of a flame test. The borax bead test is the most common.
..... Click the link for more information.
). Borax is widely and diversely used, e.g., as a mild antiseptic, a cleansing agent, a water softener, a corrosion inhibitor for antifreeze, a flux for silver soldering, and in the manufacture of enamels, shellacs, heat-resistant glass (e.g., Pyrex), fertilizers, pharmaceuticals, and other chemicals. It is sometimes used as a preservative but is toxic if consumed in large doses. Naturally occurring borax (sometimes called tincal) is found in large deposits in the W United States (Borax Lake in Death Valley, Calif.; Nevada; and Oregon) and in the Tibet region of China. Borax can also be obtained from borate minerals such as kernite, colemanite, or ulexite. California is the chief source of borate minerals in the United States.

Borax

 

sodium tetraborate, Na2B4O7·IOH2O, crystal hydrate of the sodium salt of tetraboric acid. It is found in nature in the form of the mineral borax (or tincal), which is white or, less frequently, gray and yellow in color; its density is 1, 690-1, 720 kg/m3. Borax is soluble in water (1.6 g of the anhydrous salt in 100 g of H2O at 10° C). Aqueous solutions of borax are alkaline and absorb CO2 from the air. Borax is decomposed by strong acids. It is used in soldering, since fused borax dissolves oxides of metals and in that way cleans the metallic surfaces to be soldered. Borax is used in the production of special kinds of glass (mainly optical), enamels, glazes, for tanning leather, for making substances borated, and in agriculture as a trace-element fertilizer.

Borax is a medicinal preparation that has antiseptic action. It is used in the form of a 3-5 percent solution for irrigation and lubrication of the buccal cavity, nose, and nasopharynx in various infectious diseases (tracheitis, head cold, stomatitis, and others). Borax is prescribed internally for treatment of epilepsy (especially in children).

borax

[′bȯ‚raks]
(mineralogy)
Na2B4O7·10H2O A white, yellow, blue, green, or gray borate mineral that is an ore of boron and occurs as an efflorescence or in monoclinic crystals; when pure it is used as a cleaning agent, antiseptic, and flux. Also known as diborate; pyroborate; sodium (1:2) borate; sodium tetraborate; tincal.

borax

1. a soluble readily fusible white mineral consisting of impure hydrated disodium tetraborate in monoclinic crystalline form, occurring in alkaline soils and salt deposits. Formula: Na2B4O7.10H2O
2. pure disodium tetraborate
References in periodicals archive ?
Glass McPhail traps baited with torula yeast/ borax solution have been the standard trapping system for Anastrepha spp.
The wood specimens were smoked with mangium wood for 15 days, and for comparison purposes, untreated wood specimens (as a control), polystyrened wood, and preserved wood with borax were also tested.
However, ingesting it or applying large amounts to the skin can cause acute poisoning, so parents should be vigilant about where they store and use products containing Borax.
The ARS-MSU team treated manure pits beneath swine nursery rooms with a powder containing either 1 or 2 percent borax once a week for six weeks.
The aim of this research is to give evidence that the two-dimensional nucleation growth hillocks occur on the surface of (100) face of borax crystals by in situ optical microscopy technique and supported by ex situ technique of AFM.
Borax officials have told the district they will not take a position on the bond, Challinor said.
Soap Flakes, Soda Crystals, Borax and Bicarb each have only one biodegradable ingredient and none of them contain harmful bleaches or phosphates.
After nearly two decades of land use wrangling, Borax is nearing approval to build 1,000 homes just north of Brookings, the coast's southernmost town.
Contact: Christine Messina-Boyer, Millennium Cell, phone 732-544-5712; Susan Keefe, Borax, phone 661-287-5484.
Step 3: Pour a little of the borax and water into the glue and water.
Borax, Former sponsor of Death Valley Days, owns most of the borax reserves in the world.
To test how harmful food additives were, Wiley recruited a "poison squad" of 12 healthy men and fed them diets with substances commonly used in food processing, such as soap, borax, and formaldehyde, in gradually increasing amounts until they showed symptoms of illness.