7775-19-1

Basic information

• Product Name: Sodium metaborate
• Synonyms: Boric acid (HBO2), sodium salt;Boric acid, monosodium salt;Monosodium metaborate;NaBO2;Rasorite;Sodium dioxoborate;SODIUM MONOBORATE;SODIUM METABORATE
• CAS NO: 7775-19-1
• Molecular Formula: BNaO₂
• Molecular Weight: 65.8
• EINECS: 231-891-6
• Product Categories: Inorganics
• Mol File: 7775-19-1.mol
• Article Data: 12

Chemical Properties

• Melting Point: 966 °C
• Boiling Point: 1434 °C
• Appearance: /white hexagonal crystals
• Density: 2.464
• PKA: 8.94[at 20 ℃]
• 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]
• CAS DataBase Reference: Sodium metaborate(CAS DataBase Reference)
• NIST Chemistry Reference: Sodium metaborate(7775-19-1)
• EPA Substance Registry System: Sodium metaborate(7775-19-1)

Safety Data

• RIDADR: UN3077(solid)
• Hazardous Substances Data: 7775-19-1(Hazardous Substances Data)

Usage

Description

Sodium metaborate, also known as sodium salt of metaboric acid, is an inorganic sodium salt with metaborate as the counterion. It is characterized by its white lumps and is soluble in water, making it a versatile compound with various applications across different industries. Sodium metaborate is noncombustible and has a significant role in the manufacturing of borosilicate glasses, as well as being a component in herbicides, antifreeze, and oil additives.

Uses

1. Used in Glass Manufacturing:
Sodium metaborate is used as a raw material for the production of borosilicate glasses due to its ability to enhance the glass's properties, such as thermal resistance and chemical durability.
2. Used in Herbicides:
Sodium metaborate is used as an active ingredient in herbicides for controlling the growth of unwanted plants. It is commercially available as octahydrate and tetrahydrate forms.
3. Used in Antifreeze:
Sodium metaborate is used as a component in antifreeze formulations to prevent the freezing of water in the cooling systems of internal combustion engines.
4. Used as an Oil Additive:
Sodium metaborate is used as an additive in the oil industry, providing anti-wear properties and enhancing the performance and lifespan of lubricants.
5. Used in Desulphurization Process:
Sodium metaborate electroreduction in the alkaline system can act as a novel desulphurization process for coal water slurry, helping to reduce the environmental impact of coal combustion.
6. Used in Hydrolysis of Sodium Borohydride:
Sodium metaborate plays a role in the hydrolysis of sodium borohydride, which is essential for minimizing water utilization in various industrial processes.
7. Used as a Novel Alkali in Alkali/Surfactant/Polymer Flooding:
Sodium metaborate can act as a novel alkali in alkali/surfactant/polymer flooding, a method used to enhance oil recovery from reservoirs by reducing the oil's viscosity and increasing its mobility.
8. Used in Thermo-chemical Production of Sodium Borohydride:
Sodium metaborate is useful in the thermo-chemical production of sodium borohydride, which is a safe and practical hydrogen storage material for on-board hydrogen production.
Agricultural Uses:
1. Used as a Herbicide, Insecticide, Fungicide, and Nematocide in the U.S:
Sodium metaborate is registered for use in the United States as a herbicide, insecticide, fungicide, and nematocide. However, it is not listed for use in EU countries.
2. Used in Boron Micronutrient Production:
Rasorite, one of the sources of borax, is produced by re-crystallizing the ores. Borax (Na2B407?10H2O) is a source of the boron micronutrient and has many uses in agriculture, including enhancing plant growth and development.

Reference

https://en.wikipedia.org/wiki/Sodium_metaborate Liu, Weimin. "The Antiwear Properties of Sodium Metaborate as an Oil Additive” Tribology 48.4(1990):290-293. 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. 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. 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. 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.

Trade name

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

InChI:InChI=1/BO2.Na/c2-1-3;/q-1;+1

Upstream product

• 16940-66-2 sodium tetrahydroborate 
• 7732-18-5 water 
• 18283-93-7 tetraborane 
• 11113-50-1 boric acid 
• 497-19-8 sodium carbonate 
• 141-53-7 sodium formate 
• 1330-43-4 borax 
• 1310-73-2 sodium hydroxide 
• 7782-49-2 selenium 
• 10043-11-5 boron nitride 

Downstream Products

• 16940-66-2 sodium tetrahydroborate 
• 152454-84-7 N-(3-Hydroxy-1-phenyl-propyl)-2-[4-(2-butyl-4-chloro-5-hydroxymethyl-imidazol-1-yl-methyl)phenyl]-2-cyclopentyl acetamide 
• 76608-88-3 (E)-1-cyclohexyl-4,4-dimethyl-3-hydroxy-2-(1,2,4-triazol-1-yl)-pent-1-ene 
• 85366-65-0 3-bromo-4-(trifluoromethoxy)benzyl alcohol 
• 72396-97-5 4-Cyclohexyl-benzhydrol 
• 39662-63-0 5-ethoxy-pyrrolidin-2-one 
• 7632-04-4 sodium perborate 
• 174265-12-4 2-bromo-5-chlorobenzaldehyde 

Relevant articles and documents

Sound Velocities, Elasticity, and Mechanical Properties of Stoichiometric Submicron Polycrystalline δ-MoN at High Pressure

Acoustic velocities and elasticity of stoichiometric submicron polycrystalline δ-MoN have been reported at high pressure using ultrasonic measurements and first-principles calculations. Using the finite-strain equation-of-state approach, the bulk modulus

Study of vaporization of sodium metaborate by transpiration thermogravimetry and knudsen effusion mass spectrometry

The vaporization of solid sodium metaborate NaBO2(s) was studied by transpiration thermogravimetry (TTG) and Knudsen effusion mass spectrometry (KEMS). The transpiration measurements, performed for the first time on NaBO2(s), involved use of argon as the carrier gas for vapor transport and derivation of vapor pressure of NaBO2(g) (by assuming it as the sole vapor species) through many flow-dependence runs and temperature-dependence runs in the temperature range 1075-1218 K. The KEMS measurements performed in the temperature range 1060-1185 K confirmed NaBO 2(g) as the principal vapor species over NaBO2(s), in accord with the previously reported KEMS studies. The values of p(NaBO 2) obtained by both TTG and KEMS are consistent within the uncertainties associated with each method and so are the second-and third-law values of enthalpy of sublimation, the latter aspect consistently missing in all previous vaporization studies. The results of both TTG and KEMS were combined to recommend the following thermodynamic parameters pertinent to the sublimation reaction, NaBO2(s) = NaBO2(g): Log{p(NaBO 2)/Pa} = -(17056 ?± 441)/(T/K) + (14.73 ?± 0.35) for the temperature range 1060-1218 K; ??rHo m(298.15 K) = (346.3 ?± 9.4) kJa?￠mol-1; and ??rSom(298.15 K) = (210.2 ?± 6.8) Ja?￠mol-1a?￠K-1. ? 2011 American Chemical Society.

Hierarchical porous ZIF-8 for hydrogen production: Via the hydrolysis of sodium borohydride

Hydrides show good performance for hydrogen gas storage/release. However, hydrogen gas release from hydrides via hydrolysis is a slow process and thus requires a catalyst. Herein, terephthalic acid (TPA) is used for the synthesis of a hierarchical porous zeolitic imidazolate framework (HPZIF-8). A mechanistic study of materials synthesis involved an in situ synthesis of zinc hydroxide nitrate nanosheets with an interplanar distance of 0.97 nm. Terephthalic acid modulates the pH value of the synthesis solution leading to the formation of HPZIF-8 with the Brunauer-Emmett-Teller (BET) surface area, Langmuir surface area, and total pore size of 1442 m2 g-1, 1900 m2 g-1, and 0.69 cm3 g-1, respectively. The formed phases during the synthesis undergo fast conversion to HPZIFs at room temperature. The application of the prepared materials in the hydrolysis of NaBH4 is reported. Acidity plays an important role in the catalytic performance of the materials. ZIF-8 prepared using terephthalic acid shows high catalytic activity with a hydrogen rate of 2333 mLH2 min-1 gcat-1 (8046 mLH2 min-1 gZn-1). The material exhibits high catalytic activity without any deterioration of its performance for several uses during continuous NaBH4 feeding. There are no changes in the material's structure after catalysis indicating the high recyclability of the materials.

UiO-66 as a catalyst for hydrogen production: Via the hydrolysis of sodium borohydride

The exploration of a highly efficient catalyst for the hydrolysis of sodium borohydride (NaBH4) is a valuable step toward a hydrogen economy. UiO-66 (Universitetet i Oslo) was synthesized via a solvothermal method using acetic acid as a modulator. The material was characterized using X-ray diffraction (XRD), nitrogen adsorption-desorption isotherms, Fourier transform infrared (FT-IR) spectroscopy, thermogravimetric analysis (TGA), temperature-programmed desorption (TPD), and transmission electron microscopy (TEM). Data analysis reveals the formation of a pure and highly crystalline phase of UiO-66 with the Brunauer-Emmett-Teller (BET) and Langmuir specific surface areas of 1125 m2 g-1, and 1250 m2 g-1, respectively. UiO-66 was analysed as a catalyst for hydrogen generation via the hydrolysis of NaBH4. The effect of the NaBH4 amount and catalyst loading was investigated. The reaction time decreased with an increase of the amount of NaBH4 or UiO-66. UiO-66 exhibited an average hydrogen generation rate of 6200 mL min-1 g-1. The high catalytic performance of UiO-66 could be due to its large surface area and acidic sites. The results suggested that UiO-66 showed high potential to catalyze the hydrogen production via the hydrolysis of hydrides. This journal is