|
|
Proveedores de
Selenium dioxide
|
Identificación | CAS |
7446-08-4 | Formula |
SeO2 | EINECS |
231-194-7 |
|
27 Proveedores registrados
Purity: >/= 98%
Package: 25Kg/drum
MOQ: 25Kg
Delivery Time: 5 days (Transportation and Sailing Time is not included)
Supply ability: 600T/y
Appearance | White crystal
| Selenium Dioxide | ≥ 98.0 %
| Hydrochloric acid insoluble | ≤ 0.02 %
| Fe | ≤ 0.002 %
| Loss on drying | ≤ 1.0 %
| Selenate and sulphate | ≤ 0.1 %
| Water dissolution test | Eligible
| Chloride (Cl) | ≤ 0.005%
| Heavy metal | ≤ 0.06%
| Standard | Technical grade
| Capacity | 100MT/month
| Loading port | Shanghai
| Use | Selenium dioxide can be used as manganese electrolysis additive, microelement additive for beverage, blackening agent for steal material.Selenium dioxide can be used to deposit zirconium, hafnium and selenium compounds
| Package | 25kg/drum,or according to the customers’ demand
| Storage | Stored in the dry and ventilated inside storeroom, prevent direct sunlight, slightly pile and put down |
Molecular Formula: O2Se
Más detalles se encuentran aquí
Property | white crystal powder
| Selenium Content | ≥ 69% |
Selenium Dioxide 98%min
Selenium dioxide Basic information
Product Name: Selenium dioxide Synonyms: Selenious acid anhydride;SELENIOUS ANHYDRIDE;SELENIUM AA/ICP CALIBRATION/CHECK STANDARD;SELENIUM AA SINGLE ELEMENT STANDARD;SELENIUM, AAS STANDARD SOLUTION;SELENIUM AA STANDARD;SELENIUM ATOMIC ABSORPTION SINGLE ELEMENT STANDARD;SELENIUM ATOMIC ABSORPTION STANDARD CAS: 7446-08-4 MF: O2Se MW: 110.96 EINECS: 231-957-4 Product Categories: Inorganics;Metal and Ceramic Science;Oxides;Selenium;Others;Oxidation;Synthetic Reagents;metal oxide Mol File: 7446-08-4.mol
Selenium dioxide Chemical Properties mp 315 °C (subl.)(lit.) bp 684.9 °C(lit.) density 4.81 g/mL at 25 °C(lit.) vapor pressure 1 mm Hg ( 157 °C) Fp 315°C solubility H2O: soluble form powder color white Water Solubility 38.4 g/100 mL (14 ºC) Sublimation 315 ºC Merck 14,8434
Stability: Stable. Incompatible with organic materials, strong acids, ammonia, nitric acid, halogen acids. Protect from moisture. CAS DataBase Reference 7446-08-4(CAS DataBase Reference) NIST Chemistry Reference Selenium dioxide(7446-08-4) EPA Substance Registry System Selenium oxide (SeO2)(7446-08-4)
Selenium dioxide Usage And Synthesis
Chemical Properties yellowish white to reddish powder or crystals General Description A white or creamy-white volatile lustrous crystal or crystalline powder with a pungent sour smell. Melting point 340 deg C. Density 3.954 g / cm3 . Toxic by ingestion and inhalation. Air & Water Reactions In presence of water will corrode most metals [USCG, 1999]. Readily soluble in water forming selenious (selenous) acid. Reactivity Profile Inorganic oxidizing agents, such as Selenium dioxide , react with reducing agents to generate heat and products that may be flammable, combustible, or otherwise reactive. Selenium dioxide reacts with water, particularly hot water, to give selenious (selenous) acid, a weak acid that is corrosive. Stable to light and heat. Rapidly absorbs dry hydrogen fluoride, hydrogen chloride, hydrogen bromide to form the corresponding selenium oxohalide. A good oxidizing agent. Reacts oxidatively with ammonia to form dinitrogen gas and selenium [Merck]. Oxidizes many organic substances. Health Hazard Absorption of selenium may be demonstrated by presence of the element in the urine and by a garlic-like odor of the breath. Inhalation of dust can cause bronchial spasms, symptoms of asphyxiation, and pneumonitis. Acute symptoms of ingestion include sternal pain, cough, nausea, pallor, coated tongue, gastrointestinal disorders, nervousness, and conjunctivitis. Contact with eyes causes irritation. Fire Hazard Special Hazards of Combustion Products: Sublimes and forms toxic vapors when heated in fire.
Raw materials Nitric acid-->Oxygen-->Selenium-->NITROGEN DIOXIDE
|
|
|
Proveedores privilegiados
Última actualización 2024-06-07 |