Boron oxide
- Boron trioxide
- Diboron trioxide
Boron oxide | |
| |
| Formula | B2O3 |
| Structure | |
| Description | Colorless powder or semi-transparent lumps, colorless. |
| Uses | Used in herbicides, fire resistant additive for paints, electronics, liq encapsulation techniques. |
| Registry Numbers and Inventories. | |
| CAS | 1303-86-2 |
| EC (EINECS/ELINCS) | 215-125-8 |
| RTECS | ED7900000 |
| RTECS class | Primary Irritant |
| Merck | 12,1365 |
| Beilstein/Gmelin | 173730 (G) |
| EPA OPP | 11002 |
| Swiss Giftliste 1 | G-3189 |
| Canada DSL/NDSL | DSL |
| US TSCA | Listed |
| Austrailia AICS | Listed |
| New Zealand | Listed |
| Japan ENCS (MITI) | Listed |
| Korea ECL | Listed |
| Properties. | |
| Formula | B2O3 |
| Formula mass | 69.62 |
| Melting point, °C | 450 |
| Boiling point, °C | 1860 |
| Vapor pressure, mmHg | 12 (1400 C) |
| Vapor density (air=1) | 2.4 |
| Density | 1.81 - 1.86 g/cm3 |
| Solubility in water | 36 g/L |
| Viscosity | 85000 cp (700 C) |
| Thermal expansion | 0.000083/K |
| Heat of fusion | 22.20 kJ/mol |
| Hazards and Protection. | |
| Storage | Store in a cool, dry place. Store in a tightly closed container. |
| Handling | Wash thoroughly after handling. Wash hands before eating. Use with adequate ventilation. Avoid breathing dust, vapor, mist, or gas. Do not get on skin or in eyes. Do not ingest or inhale. |
| Protection | Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure. |
| Respirators | Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary. |
| Small spills/leaks | Vacuum or sweep up material and place into a suitable disposal container. Reduce airborne dust and prevent scattering by moistening with water. Clean up spills immediately, using the appropriate protective equipment. |
| Disposal code | 28 |
| Stability | Stable under normal temperatures and pressures. |
| Incompatibilities | Acids. |
| Decomposition | No data available. |
| Fire. | ||||
| Fire fighting | Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Substance is noncombustible. Extinguishing media: Use extinguishing media most appropriate for the surrounding fire. | |||
| Fire potential | Noncombustible | |||
| NFPA | Health | 2 | ||
| Flammability | 0 | |||
| Reactivity | 0 | |||
| Health. | |
| Exposure limit(s) | TLV (as TWA): ppm; 10 mg/m3 (ACGIH 1995-1996). OSHA PEL: TWA 15 mg/m3 NIOSH REL: TWA 10 mg/m3 NIOSH IDLH: 2000 mg/m3 |
| Poison_Class | 2 |
| Exposure effects | Significant ingestions or dermal exposures can be associated with weak, rapid pulse, cyanosis and abnormally low blood pressure. The patient may present with reduced body temperature, elevated body temperature or normal body temperature. Headache, lethargy, restlessness, weakness, CNS irritation, and/or seizures may occur with long term or repeated exposures. There is insufficient information concerning the reproductive effects of borates in humans. Adverse testicular effects and infertility have been reported in animals. <br>There have been limited animal studies which suggest decreased ovulation, fetotoxicity and developmental defects may occur with very high exposure levels. Maternal toxicity was present in some studies. |
| Ingestion | May cause gastrointestinal irritation with nausea, vomiting and diarrhea. |
| Inhalation | Causes severe irritation of upper respiratory tract with coughing, burns, breathing difficulty, and possible coma. |
| Skin | Causes skin irritation. |
| Eyes | Causes eye irritation. |
First aid |
|
| Ingestion | Never give anything by mouth to an unconscious person. Get medical aid. If conscious drink water, then induce vomiting. If unconscious, immediately take victim to a physician and do NOT attempt to induce vomiting. |
| Inhalation | Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid. |
| Skin | Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Get medical aid if irritation develops or persists. |
| Eyes | Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid. |
| Transport. | ||
| HS Code | 2810 00 10 | |