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Sodium tetraborate decahydrate

Description References
Sodium tetraborate decahydrate
Sodium tetraborate decahydrate
Chemical Name:
Sodium tetraborate decahydrate
Molecular Formula:
Formula Weight:
MOL File:

Sodium tetraborate decahydrate Properties

Melting point:
75 °C
Boiling point:
1.73 g/mL at 25 °C(lit.)
vapor pressure 
0.213 hPa (20 °C)
storage temp. 
Store at RT.
H2O: 0.1 M at 20 °C, clear, colorless
White, gray, bluish or greenish white streaked
9.15-9.20 (25℃, 0.01M in solution)
Water Solubility 
60 g/L (20 ºC)
λ: 260 nm Amax: 0.012
λ: 280 nm Amax: 0.010
CAS DataBase Reference
EPA Substance Registry System
Borax (B4Na2O7.10H2O)(1303-96-4)
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
Hazard Codes  Xn,T
Risk Statements  62-61-60
Safety Statements  22-24/25-36/37-45-53
WGK Germany  1
RTECS  VZ2275000
HS Code  28401990
Hazardous Substances Data 1303-96-4(Hazardous Substances Data)
Toxicity LD50 orally in rats: 5.66 g/kg (Smyth)
Signal word: Danger
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H360 May damage fertility or the unborn child Reproductive toxicity Category 1A, 1B Danger
Precautionary statements:
P201 Obtain special instructions before use.
P202 Do not handle until all safety precautions have been read and understood.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P308+P313 IF exposed or concerned: Get medical advice/attention.
P405 Store locked up.

Sodium tetraborate decahydrate price More Price(25)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 31457 Sodium tetraborate decahydrate puriss. p.a., ACS reagent, reag. ISO, buffer substance, ≥99.5% 1303-96-4 100g $19.8 2018-11-13 Buy
Sigma-Aldrich 31457 Sodium tetraborate decahydrate puriss. p.a., ACS reagent, reag. ISO, buffer substance, ≥99.5% 1303-96-4 1kg $77.9 2018-11-13 Buy
Alfa Aesar A16176 Sodium tetraborate decahydrate 99+% 1303-96-4 500g $19.9 2018-11-20 Buy
Alfa Aesar 040114 Sodium tetraborate decahydrate, ACS, 99.5-105.0% 1303-96-4 500g $32.8 2018-11-16 Buy
Strem Chemicals 93-1070 Sodium tetraborate decahydrate, 99.5+% (ACS) 1303-96-4 500g $36 2018-11-13 Buy

Sodium tetraborate decahydrate Chemical Properties,Uses,Production


Sodium tetraborate decahydrate also known as Borax, sodium borate, sodium tetraborate, or disodium tetraborate is a naturally occurring compound.
It is mostly used as a cleaning aid especially for laundry (softening the water). As a cleaning aid, borax is also used as dishwasher detergent, as floor and wall cleaner, and to clean outdoor furniture, toilet, porcelain sinks, stains from stainless steel. Borax can be used for parasite control to keep ants, water bugs, and cockroaches away and help dogs with mange and people with a variety of parasite problems including lice and mites. Due to its alkalinity and antifungal properties, Borax is used in hair care products to heal chronic and embarrassing scalp conditions. Borax is also used as a remedy for health problems (arthritis, osteoporosis, bone spurs, calcium deposits, lupus, autoimmune disease, hormone imbalances, fungus, candida, ringworm, tinea versicolor, insomnia, rough skin). Furthermore, Borax is applied as a fire retardant, as a flux in metallurgy, as a precursor for other boron compounds, as anti-fungal compound for fiberglass and cellulose insulation, to make buffer solutions in biochemistry, and to make indelible ink for dip pens by dissolving shellac into heated borax.



Chemical Properties

White cryst. powder

Chemical Properties

Borax is a noncombustible (an inherent fire retardant), bluish-gray or green, odorless crystalline powder or granules.




Buffers; complexing or masking agent.


A natural, colorless salt crystal found in some lake beds. It is soluble in water and glycerin but not in alcohol. When mixed with water, it produces a slight alkaline reaction. Its use in photography was principally as a pH modifier in gold toning baths, but it was also used as a restrainer in pyrogallic acid developers and as an accelerator in hydroquinone developers.


Soldering metals; manufacture of glazes and enamels; tanning; in the production of adhesives and in anticorrosion systems; in cleaning Compounds; artificially aging wood; as preservative, either alone or with other antiseptics against wood fungus; fireproofing fabrics and wood; curing and preserving skins; in cockroach control. Pharmaceutic aid (alkalizer).


Toxic by inhalation.

Safety Profile

Experimental poison by subcutaneous route. Moderately toxic to humans by ingestion. Moderately toxic experimentally by ingestion, intravenous, and intraperitoneal routes. Experimental reproductive effects. Mutation data reported. Ingestion of 5-10 g of borax by children can cause severe vomiting, diarrhea, shock, death. Incompatible with acids, metallic salts. When heated to decomposition it emits toxic fumes of Na2O, boron. See also BORON COMPOUNDS. Used in ant poisons, for fly control around refuse and manure piles, as a larvicide, in manufacture of glazes, enamels, cleaning compounds, and in soldering metals.

Potential Exposure

Borax is used as a soldering flux, preservative against wood fungus; and as an antiseptic. Used in ant poisons, for fly control around refuse and manure piles, as a larvicide. It is used in the manufacture of enamels and glazes, fiberglass insulation; sodium perborate bleach; in tanning, cleaning compounds; for fireproofing fabrics and wood; and in artificial aging of wood.

First aid

If this chemical gets into the eyes, remove any contact lenses at once and irrigate immediately for at least 15 minutes, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts the skin, remove contaminated clothing and wash immediately with soap and water. Seek medical attention immediately. If this chemical has been inhaled, remove from exposure, begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR if heart action has stopped. Transfer promptly to a medical facility. When this chemical has been swallowed, get medical attention. Give large quantities of water and induce vomiting. Do not make an unconscious person vomit. Personal Protective Methods: Exposed workers should be educated in the proper use of protective equipment and there should be strict adherence to ventilating provisions in work areas. Workers involved with the manufacture of boric acid should be provided with masks to prevent inhalation of dust and fumes.


UN3077 Environmentally hazardous substances, solid, n.o.s., Hazard class: 9; Labels: 9—Miscellaneous hazardous material, Technical Name Required.

Purification Methods

Crystallise the borate from water (3.3mL/g), keeping below 55o to avoid formation of the pentahydrate. Filter it off at the pump, wash it with water and equilibrate it for several days in a desiccator containing an aqueous solution saturated with respect to sucrose and NaCl. Borax can be prepared more quickly (but its water content is somewhat variable) by washing the recrystallised material at the pump with water, followed by 95% EtOH, then Et2O, and dried in air at room temperature for 12-18hours on a clock glass. [Becher in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol I pp 794-795 1963.]


Dissolves in water forming a basic solution. Boron dust may form explosive mixture with air. Contact with strong oxidizers may be violent. Boron is incompatible with ammonia, bromine tetrafluoride, cesium carbide, chlorine, fluorine, interhalogens, iodic acid, lead dioxide, nitric acid, nitric oxide, nitrosyl fluoride, nitrous oxide, potassium nitrite, rubidium carbide, silver fluoride.

Waste Disposal

Borax, dehydrated: The material is diluted to the recommended provisional limit (0.10 mg/L) in water. The pH is adjusted to between 6.5 and 9.1 and then the material can be discharged into sewers or natural streams.

Sodium tetraborate decahydrate Preparation Products And Raw materials

Raw materials

Preparation Products

Sodium tetraborate decahydrate Suppliers

Global( 217)Suppliers
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Shanghai Time Chemicals CO., Ltd.
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J & K SCIENTIFIC LTD. 400-666-7788 +86-10-82848833
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+86-(0)21-61259102(Shanghai) +86-(0)755-86170066(ShenZhen) +86-(0)10-88580358(Beijing) China 40399 62
3B Pharmachem (Wuhan) International Co.,Ltd. 86-21-50328103 * 801、802、803、804 Mobile:18930552037
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Alfa Aesar 400-610-6006; 021-67582000
021-67582001/03/05 China 30308 84

Sodium tetraborate decahydrate Spectrum

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