Disodium octaborate tetrahydrate

• CAS: 12280-03-4
• Catalog Number: ACM12280034-1
• Category: Main Products
• Molecular Weight: 412.52
• Molecular Formula: Na2B8O13·4H₂O
• Description: Under normal conditions, DOT is stable, free-flowing, and is a mildly alkaline salt.
• Synonyms: DOT
• IUPAC Name: disodium,boric acid,hydrogen borate,tetrahydrate
• Solubility: Solubility in Water 4.5% @ 10°C, 27.4% @ 40°C
• Appearance: Granular, Powder
• Application: Disodium Octaborate Tetrahydrate (DOT) is used as a cellulose flame retardant, wood preservative, cleaning agent, water treatment agent, and in other uses.
• Content: B2O3 66.0 - 69.0 %; Na2O 14.0 - 15.0 %
• Exact Mass: 612.14600
• Notes: Custom powdering as well as custom packaging is available to meet your specifications.
• Packaging: 50 lb/25 kg
• pH: 8.5 (1% solution 20°C); 7.6 (10% solution 20°C)

Case Study

Disodium Octaborate Tetrahydrate for Hydrothermal Conversion of Woody Biomass

Tekin, Kubilay, et al. Industrial Crops and Products, 2013, 49, 334-340.

The hydrothermal conversion of woody biomass with and without disodium octaborate tetrahydrate (Na2B8O13·4H2O) and boric acid (H3BO3) was studied at temperatures between 250 and 350 °C. The results showed that the highest total bio-oil yield of 34.9 wt% was obtained with disodium octaborate tetrahydrate at 300 °C, while the total bio-oil yield obtained in the run with H3BO3 was 19.1 wt%. The produced bio-oil, mainly oxygenated hydrocarbons, can be used as fuel oil after upgrading.
Hydrothermal conversion procedure
· The reactor used in the experiment is a 500 mL batch stainless steel reactor that can operate at a maximum temperature of 500 °C and pressure of 35 MPa.
· For non-catalytic runs, 10 g of biomass (on a dry basis) and 100 mL of distilled water were placed in the reactor. In the catalytic runs, the reactor was filled with 10 g of woody biomass (dry basis), 100 mL of water, and 1 g of catalyst.
· The reactor was then purged with nitrogen three times to remove any air present. Subsequently, the reactor was heated to the desired temperatures of 250, 300, and 350 °C, with the heating process stopped once the target temperature was reached, resulting in a reaction time of 0 minutes.
· Due to the study's focus on wood liquefaction in hydrothermal conditions, lower temperatures were selected and gas yield was not measured. This series of hydrothermal liquefaction experiments was repeated three times with LBOs, HBOs, and SRs.

Disodium Octaborate Tetrahydrate-Based Formulation as Wood Flame Retardant

Tondi, G., et al. Fire and Materials, 2014, 38(3), 381-390.

This work compares the fire protection performance of two boron-containing water-based formulations, namely disodium octaborate tetrahydrate (DOT) and tannin-based wood preservatives. According to the fire test results, the wood samples treated with DOT showed complete fire protection effect and are suitable for high-performance fire protection needs in interiors.
DOT/tannin-based formulation impregnated wood samples
· Specimens of Scots pine sapwood were cut and dried consecutively for a minimum of 3 days at 104 °C. These dried samples were then placed in a desiccator, and a 30-minute vacuum of 8 mbar was applied to eliminate trapped air in the wood cells.
· Following this, the desiccator was filled with the impregnation solution, and pressure was gradually increased to reach environmental pressure. The samples remained immersed in the solution for 24 hours. · The weight of the wood samples was monitored before and after treatment to assess the uptake of the impregnation solution.
· The wet samples impregnated with tannin were allowed to harden for at least 12 hours at 104 °C, while those treated with DOT were dried for 24 hours at 60 °C. Subsequently, the treated specimens were placed in a climatic chamber to achieve a wood moisture content equilibrium of 12% for a minimum of 1 week before testing.
· The water-borne impregnation solution of DOT was prepared with a concentration of 28% by weight, and the solution was slightly heated to 50 °C for 1 hour to enhance solubility of DOT in water.