Wood preservation facilities, inorganic boron: chapter I, table 2
Table 2. Physical and Chemical Properties of Borate Wood Preservatives
Identification
| Common synonyms | Boron, borate, disodium octaborate tetrahydrate |
| Registrant in 2012 | U.S. BORAX
SOCIETA' CHIMICA LARDERELLO S.P.A.
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Transportation and storage information
| Shipping state | Powder (inorganic borate salt) |
| Concentration (by weight, as oxides) |
|
| Classification | Eye irritant |
| Placards | Check with Transport Canada |
| Storage temperature | Ambient |
| Venting | no requirement |
| Special sensitivity | Moisture (caking) |
| Containers | Multi-wall paper bags with a polyethylene moisture-resistant barrier for powder Mild steel for solutions |
| Delivery format | Bags of 5-25 kg net weight |
Physical and chemical properties
| Physical state | Solid |
| Chemical formula | Na2B8013.4H20 |
| Chemical Abstracts Service Registration Number (CAS RN) | 12280-03-4 |
| Chemical Composition |
|
| Solubility | 9.7% (20ºC) 34.4% (50ºC) |
| pH @ 20ºC | 8.3 (3.0% solution) |
| Appearance | White powder |
| Odour | Odourless |
| Melting point | 815ºC |
| Vapour pressure | Negligible @ 20ºC |
| Molecular weight | 412.52 |
| Concentration of work solutions | 1-5% |
| Typical preservative retention in treated wood | 2.7 kg/m3 (as B203) |
Hazard data
Fire
| Fire behaviour | No general hazard; not flammable, combustible or explosive Product is a fire retardant. |
| Extinguishing data | Compatible with all extinguishing media. |
Reactivity
Reacts with strong reducing agents such as metal hydrides or alkali metals; will generate hydrogen gas, which could create an explosive hazard
| Stability | Stable |
| Hazardous decomposition | None |