Phosphorus red
Phosphorus,red
CAS: 7723-14-0
Molecular Formula: P
Phosphorus red - Names and Identifiers
Phosphorus red - Physico-chemical Properties
| Molecular Formula | P |
| Molar Mass | 30.9738 |
| Melting Point | 590℃ |
| Water Solubility | insoluble |
| Vapor Presure | 27300mmHg at 25°C |
| Physical and Chemical Properties | Properties: magenta cubic crystalline or amorphous powder with metallic luster. melting point 590 ℃ boiling point 280 ℃ relative density 2.34 soluble in phosphorus tribromide and sodium hydroxide, insoluble in water, carbon disulfide, ammonia and ether. |
| Use | Used in the production of matches, pyrotechnic, phosphoric acid, phosphorus compounds, pharmaceuticals, pesticides, combustibles and Organic synthesisIt is used as a diffusion source in the semiconductor industry, in organic analysis for the reductive reaction of iodic acid, and in organic synthesis |
Phosphorus red - Risk and Safety
| Hazard Symbols | F - Flammable |
| Risk Codes | R11 - Highly Flammable R16 - Explosive when mixed with oxidizing substances R52/53 - Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment. |
| Safety Description | S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. S7 - Keep container tightly closed. |
| UN IDs | UN 1381/1338/2447 |
Phosphorus red - Upstream Downstream Industry
Phosphorus red - Nature
Open Data Verified Data
purplish red or brownish amorphous powder, non-toxic, tasteless and glossy. Easy to absorb moisture. d 2. 34, heat to 416 °c for sublimation, and heat to 590 °c at 43kPa for melting. White phosphorus is obtained by condensation after gasification. Insoluble in water and carbon disulfide, ether, ammonia, slightly soluble in ethanol. Stability is better than white phosphorus, stable at room temperature, no phosphorescence, difficult to react with oxygen. Ignition above 200 ℃. It is mainly reductive, and it is a reducing agent when reacting with halogen and sulfur.
Last Update：2024-01-02 23:10:35
Phosphorus red - Use
Open Data Verified Data
The Red phosphorus flame retardant is a non-halogen efficient flame retardant. Because red phosphorus will produce severe dehydration into carbon during combustion, it can effectively prevent combustion, has a very effective flame retardant effect, and can be widely used in rubber and plastic products. Polymer material phosphorus content of 5% that has self-extinguishing effect, much lower than other flame retardants. In theory, red phosphorus flame retardant can be applied to most polymer materials, but because ordinary red phosphorus is easy to absorb moisture and has poor compatibility with polymer materials, it is especially easy to cause spontaneous combustion and cannot be actually used. In order to make it easy for safe storage, transportation and use, there have been colloidal red phosphorus and microencapsulated red phosphorus products, which solve the disadvantages of red phosphorus and have low smoke, high flame retardant efficiency and no dust pollution, many advantages, such as excellent processability, widely used in PET, PC, PBT, PA and other oxygen rich materials flame retardant.
Last Update：2022-01-01 09:04:51
Phosphorus red - Preparation Method
Open Data Verified Data
- conversion method (closed steel pot device): add yellow phosphorus into a closed cast iron pot or steel pot, red phosphorus is converted by gas or electric heating at a temperature slightly lower than 420 ℃ for several hours under isolated air. After cooling, the material in the conversion pan is dark red to purple solid, which contains trace yellow phosphorus, after pulverization, yellow phosphorus was removed by boiling with dilute caustic soda solution, and then sieved by wet method. In the rotary filter filtration and washing, after vacuum drying, prepared red phosphorus product.
- conversion method (ball mill converter device): before adding yellow phosphorus, the ball mill is replaced with inert gas. Before the temperature reaches 180~190 ℃, the converter is connected with the water seal, which takes about 2H, all water vapor was removed. The yellow phosphorus was then allowed to warm to 270 °c for about 20H under sealed conditions. The exothermic reaction started at this point and the temperature was raised to 290 °c in 4H. When the exotherm was terminated, reheating allowed the temperature to rise to 360 °c for approximately 5 hours. The content of yellow phosphorus in red phosphorus is less than 0.1%, which is removed by boiling with dilute caustic soda solution after cooling. Red phosphorus was then stabilized by the addition of 1% magnesium oxide. After filtration, washing, vacuum drying, prepared red phosphorus products.
Last Update：2022-01-01 11:02:28
Phosphorus red - Safety
Open Data Verified Data
is a Class I flammable solid. Hazard code number: GB 4.1 class 41001. UN No. 4.1 (amorphous); IMDG Code, class 1. Should be stored in a cool, dry warehouse. It is best to store it in a special library. It should be stored Isolation with oxidants and acids, away from heat sources and fire, and not mixed with flammable and explosive materials. During storage and transportation, it should be protected from humidity and hot sun exposure. Handling should be handled with light, strict anti-vibration, friction, to prevent powder scattering, such as found damage leakage, with wet sand mixing and cleaning or wet cloth to remove the leakage of powder. Iron barreled, the inside and outside of the barrel is painted, and the lid must be sealed. lOkg or 50kg net weight per barrel. When the net weight of the package is 50kg, the red phosphorus in the barrel is divided into 10 plastic bags, each with a net weight of 5kg. When the net weight of the package is 10kg, the barrel is lined with plastic bags, and each of the two barrels is packed in a wooden box, and the barrel and the other are open between the barrels and the other to prevent the impact of combustion. There should be a marked "combustible" mark outside the barrel or outside the box. The retention period was 5 months under the specified storage conditions. In case of fire, it can be suppressed by water, sand and all kinds of fire extinguishing. Firemen should wear gas masks. Toxicity and protection: see industrial yellow phosphorus.
Last Update：2022-01-01 11:02:29
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View History
Raw Materials for Phosphorus red
Downstream Products for Phosphorus red
Phosphorus tribromide
Bromoacetyl bromide
Aluminium phosphide
ZINC PHOSPHIDE
Methyl iodide
Bromisoval
Hydrobromic acid
Phosphoric acid
thiophosphoryl chloride
Sodium Tripolyphosphate
Phosphorus pentasulfide
Phosphorus,red
Bromoacetyl bromide
Aluminium phosphide
ZINC PHOSPHIDE
Methyl iodide
Bromisoval
Hydrobromic acid
Phosphoric acid
thiophosphoryl chloride
Sodium Tripolyphosphate
Phosphorus pentasulfide
Phosphorus,red