Sodium metaborate Chemical Properties

Melting point:

966 °C

Boiling point:

1434 °C

Density 

2.464

solubility 

soluble in H2O

pka

8.94[at 20 ℃]

form 

white hexagonal crystals

color 

white hexagonal, hexane crystals, crystalline

Water Solubility 

g/100g solution H2O: 14.10 (0°C), 22.00 (25°C), 55.60 (100°C); solid phase, NaBO2 ·4H2O (0°C, 25°C), NaBO2 · 2H2O (100°C) [KRU93]

NIST Chemistry Reference

Sodium metaborate(7775-19-1)

EPA Substance Registry System

Sodium metaborate (7775-19-1)

Safety Information

RIDADR 

UN3077(solid)

Hazardous Substances Data

7775-19-1(Hazardous Substances Data)

MSDS

• Language:English Provider:Monosodium metaborate

Sodium metaborate Usage And Synthesis

Description

Sodium Metaborate is the sodium salt of Metaborate. Sodium metaborate is used in the manufacturing of borosilicate glasses. It is also a component of herbicides and antifreeze¹. It can also be used as an oil additive with anti-wear properties². Sodium metaborate electroreduction in the alkaline system can act as a novel desulphurization process of coal water slurry³. It also has role in hydrolysis of sodium borohydride to minimize the water utilization⁴. It can also act as a novel alkali in alkali/surfactant/polymer flooding⁵. It is also useful in the thermo-chemical production of sodium borohydride⁶, which is a safe and practical hydrogen storage material for on-board hydrogen production.

Reference

1. https://en.wikipedia.org/wiki/Sodium_metaborate
2. Liu, Weimin. "The Antiwear Properties of Sodium Metaborate as an Oil Additive” Tribology 48.4(1990):290-293.
3. Shen, Yafei, T. Sun, and J. Jia. "A novel desulphurization process of coal water slurry via sodium metaborate electroreduction in the alkaline system." Fuel 96.7(2012):250-256.
4. Marrero-Alfonso, Eyma Y., et al. "Minimizing water utilization in hydrolysis of sodium borohydride: The role of sodium metaborate hydrates." International Journal of Hydrogen Energy 32.18(2007):4723-4730.
5. Chen, Fuzhen, et al. "Evaluation the performance of sodium metaborate as a novel alkali in alkali/surfactant/polymer flooding." Journal of Industrial & Engineering Chemistry 19.2(2013):450-457.
6. Eom, Kwang Sup, et al. "Thermochemical production of sodium borohydride from sodium metaborate in a scaled-up reactor." International Journal of Hydrogen Energy 38.6(2013):2804-2809.

Chemical Properties

White lumps.Soluble in water. Noncombustible.

Uses

Herbicide. Also available commercially as octahydrate and tetrahydrate.

Definition

ChEBI: An inorganic sodium salt having metaborate as the counterion.

Agricultural Uses

Herbicide, Insecticide, Fungicide, Nematocid: Not listed for use in EU countries. Registered for use in the U.S

Agricultural Uses

Rasorite is one of the sources of borax which is produced by re-crystallizing the ores. Borax (Na₂B₄0₇?10H₂O

) is a source of the boron micronutrient and has many uses.

Trade name

ALLPRO BARACIDE®; ATRATOL®[C]; BAREGROUND®; MONOBOR-CHLORATE®; PRAMITOL®; TRI-KILL®; UREABOR®

Sodium metaborate(7775-19-1)Related Product Information

• METABORIC ACID
• Sodium tetraphenylboron
• Sodium chloride
• Sodium benzoate
• Sodium tetraborate
• Sodium citrate
• Sodium gluconate
• Sodium tetrafluoroborate
• SODIUM TETRAETHYLBORATE
• Sodium acetate
• Sodium perborate
• Sodium formate
• Sodium carbonate
• Sodium hydroxide
• Sodium bicarbonate
• Barium boron oxide
• STANDARD BUFFER
• SODIUM METABORATE HYDRATE