Molecular Formula | Mo |
Molar Mass | 95.94 |
Density | 10.3 g/mL at 25 °C (lit.) |
Melting Point | 2617 °C (lit.) |
Boling Point | 4612 °C (lit.) |
Flash Point | -23°C |
Water Solubility | Insoluble inwater. Soluble innitric acid andsulfuric acid. Slightly soluble inhydrochloric acid. |
Solubility | H2O: soluble |
Appearance | wire |
Specific Gravity | 10.2 |
Color | Gray |
Exposure Limit | ACGIH: TWA 10 mg/m3; TWA 3 mg/m3NIOSH: IDLH 5000 mg/m3 |
Merck | 13,6257 |
Storage Condition | no restrictions. |
Stability | Stable. Powder is flammable. |
Sensitive | Air Sensitive |
Refractive Index | 2.81 (740 nm) |
MDL | MFCD00003465 |
Physical and Chemical Properties | For silver-white metal or gray-black powder (body-centered cubic crystal). Melting point 2610 °c. Boiling point 5560 °c. The relative density was 10.2. Soluble in hot concentrated nitric acid, hot concentrated sulfuric acid, aqua regia, slightly soluble in hydrochloric acid, insoluble in cold water, hot water, hydrofluoric acid and liquid ammonia. |
Use | Used as drawn Molybdenum wire, molybdenum Rod, used in the bulb or cutting industry |
Risk Codes | R36/38 - Irritating to eyes and skin. R11 - Highly Flammable R67 - Vapors may cause drowsiness and dizziness R65 - Harmful: May cause lung damage if swallowed R62 - Possible risk of impaired fertility R51/53 - Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. R48/20 - R38 - Irritating to the skin |
Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S16 - Keep away from sources of ignition. S9 - Keep container in a well-ventilated place. S62 - If swallowed, do not induce vomitting; seek medical advice immediately and show this container or label. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. S36/37 - Wear suitable protective clothing and gloves. |
UN IDs | UN 3264 8/PG 3 |
WGK Germany | 3 |
RTECS | QA4680000 |
TSCA | Yes |
HS Code | 81029600 |
Hazard Class | 4.1 |
Packing Group | III |
Raw Materials | ammonium molybdate Hydrogen |
is silver-white metal or gray-black powder (body-centered cubic crystal). Melting point 2615 °c. Boiling point 4800 °c. The relative density was 10.2. Soluble in hot concentrated nitric acid, hot concentrated sulfuric acid, aqua regia, slightly soluble in hydrochloric acid, insoluble in water, hydrofluoric acid and liquid ammonia.
industrial production molybdenum trioxide can be prepared by reducing molybdenum trioxide with hydrogen or by treating ammonium paramolybdate with acid or heating to decompose molybdenum trioxide, which is then reduced with hydrogen in a tubular electric furnace. Carbon can also be reduced to molybdenum powder, but the purity is poor.
Hydrogen reduction of molybdenum trioxide method: the reduction with hydrogen can be carried out in two stages. In the first stage, molybdenum trioxide is heated at 450~700 ℃, followed by the second stage of reduction at 900~1100 ℃ to obtain molybdenum powder.
Fmo-l is used for large slab, which is the raw material of molybdenum silicide electric heating element. Fmo-2 for silicon control disk, molybdenum plug and other raw materials. It can also be used in powder metallurgy materials, building materials, chemical and petroleum industries. Molybdenum is one of the essential trace elements in plants, which is used as a trace element fertilizer in agriculture.
molybdenum powder in case of high heat, open flame can burn or even explosion, and strong reaction with oxidant, the formation of molybdenum oxide. The product is packed in a clean polyethylene plastic bottle, the bottle cap should be tightened, the plastic bottle should be placed in a wooden box, and the surrounding area should be fixed with soft objects. Or the product is packed in an iron drum lined with a polyethylene plastic bag, with a net weight of 30kg per box (drum). The wooden case or iron drum shall have the words "moisture-proof", "fragile" and "upward. Products should be stored in dry, ventilated and acid, alkali atmosphere in the warehouse, to prevent oxidation. The product shall be protected from rain and moisture during transportation, and the package shall not be subject to severe collision to prevent breakage of the package. The storage period of molybdenum powder should not exceed half a year. When the skin or eyes contact molybdenum powder should be washed with soap water and water, and severe cases should be treated. Drink appropriate amount of water to induce vomiting. When fire occurs, use dry powder fire extinguishing agent to rescue.