borax


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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.
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). 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 ?
The standard dose is 1 teaspoon of borax per liter of water to make a concentrated, stock solution.
Maximum plant height (217.00 cm) was measured in [T.sub.6] (three foliar sprays of 0.5% borax) followed by [T.sub.4] (two foliar sprays of 0.5% borax) and [T.sub.8] (four foliar sprays of 0.5% borax) with plant height 214.00 cm and 212.33 cm, respectively, which were statistically significant as compared to T1 (control) measuring plant height (197.67 cm).
Figure 1 shows the effect of borax content, CF content, zinc powder content (or CAM content), and W/S ratio on the pore size distribution of the MPC.
Further, the addition of external borax can better stabilize the structure macroscopically.
Seed priming with 0.01 M B solution of borax produced longer seedlings than control (Table 2).
In addition to usage of boric acid, unlike from the literature, boron oxide, borax decahydrate and borax pentahydrate as boron sources were used to synthesize TPB.
Five B sources were used as raw materials in the co-granulation process; two BP[O.sub.4] compounds, colemanite, ulexite and borax. The BP[O.sub.4] compounds were synthesised by mixing boric acid ([H.sub.3]B[O.sub.3]) and phosphoric acid ([H.sub.3]P[O.sub.3]) and heating the mixture at 500 or 800[degrees]C for 1 h (Abat et al.
"Considering that mercury costs some P8,000 per kilo, borax, which costs only P100 per kilo, will be a much cheaper alternative," Cubelo said.
Foliar application of calcium chloride (CaCl2) alone had no significant effect on most of the quality variables, however, CaCl2 + Borax (Na2B4O7* 10H2O) application increased the fruit weight (19.87 g), pulp weight (14.88 g) and pulp dry weight (13.76%) in control fruits to the maximum of 20.79, 15.69 g and 15.40% respectively with CaCl2 (3%) + Borax (1.5%).
Officials for the Eldora, Iowa-based company say Uniform Wash tackles tough uniform stains with borax and stain-blasting enzymes while clinging to stains for easy application and stain removal.
Subsequently, Orocobre reported it has purchased Argentine boron minerals and refined chemicals producer Borax Argentina S.A.