The mass loss in these particles, particularly silica, is much higher than in hBN particles, suggesting that boron nitride is highly thermally stable and inherently resistant to moisture absorption. Key boron nitride properties are high thermal conductivity, low thermal expansion, good thermal shock resistance, high electrical resistance, low dielectric constant and loss tangent, microwave transparency, nontoxicity, easily machinability- non-abrasive and lubricious, chemical inertness, non-wetting by most molten. Boron in foods and beverages isn't harmful. But Boron can cause harm if a person accidentally swallows cleaning products or pesticides that contain certain forms of Boron, such as borax (sodium borate) or boric acid. The symptoms of too much Boron include nausea, vomiting, diarrhea, rashes, headaches, and convulsions. Lithium Nitride can affect you when breathed in and may be absorbed through the skin. * Contact can severely irritate and burn the skin and eyes. * Breathing Lithium Nitride can irritate the nose and throat. * Lithium Nitride is a HIGHLY FLAMMABLE and REACTIVE chemical and a DANGEROUS FIRE and EXPLOSION HAZARD. The minimal lethal dose of ingested Boron (as boric acid) was reported to be 2–3 g in infants, 5–6 g in children, and 15–20 g in adults. However, a review of 784 human poisonings with boric acid (10–88 g) reported no fatalities, with 88% of cases asymptomatic. The most hazardous of the nitrogen oxides are nitric oxide and nitrogen dioxide; the latter exists in equilibrium with its dimer, nitrogen tetroxide. The amount of Boron consumed in people who accidentally consumed Boron ranged from 18 to 9,713 mg, and most were children younger than six years [46]. Boron toxicity can also cause headaches, hypothermia, restlessness, weariness, renal injury, dermatitis, alopecia, anorexia, and indigestion. If you are looking for high quality, high purity, and cost-effective boron nitride, or if you require the latest price of boron nitride, please feel free to email contact mis-asia.