14124-67-5

Basic information

• Product Name: SELENITE
• Synonyms: selenite(2-)
• CAS NO: 14124-67-5
• Molecular Formula: O₃Se
• Molecular Weight: 126.96
• Mol File: 14124-67-5.mol
• Article Data: 5

Chemical Properties

• Boiling Point: °Cat760mmHg
• Flash Point: °C
• Appearance: /
• Density: g/cm³
• CAS DataBase Reference: SELENITE(CAS DataBase Reference)
• NIST Chemistry Reference: SELENITE(14124-67-5)
• EPA Substance Registry System: SELENITE(14124-67-5)

Safety Data

• Hazardous Substances Data: 14124-67-5(Hazardous Substances Data)

Usage

General Description

Selenite is a mineral form of the element selenium, with the chemical formula SeO2. It is a colorless and transparent crystalline solid, often found in sedimentary rocks and soils. Selenite is commonly used in the production of glass and ceramics, as well as in the manufacturing of pigments and chemicals. It is also used as a dietary supplement to provide selenium, an essential nutrient for the human body. Selenite has various industrial applications, including in the production of rubber, plastics, and electronic components. Additionally, it is used in some medical and cosmetic products for its potential antioxidant and anti-inflammatory properties. Overall, selenite is a versatile chemical with wide-ranging uses in various industries.

InChI:InChI=1/H2O3Se/c1-4(2)3/h(H2,1,2,3)/p-2

Upstream product

• 7446-08-4 selenium(IV) oxide 
• 7732-18-5 water 
• 7782-49-2 selenium 
• 80937-33-3 oxygen 
• 1310-73-2 sodium hydroxide 
• 13940-22-2 hydrogen selenide 
• 3811-04-9 potassium chlorate 
• 262597-63-7 (Et₄N)[W(OPh)(S₂C₂Me₂)4] 
• 7783-08-6 selenic acid 
• 301851-73-0 (Et₄N)[Mo(OPh)(S₂C₂Me₂)4] 
• 885314-38-5 (Et₄N)[W(OMe)(S₂C₂Me₂)2] 
• 675122-73-3 (Et₄N)[W(SC₆H₂-2,4,6-Pr(i)3)(S₂C₂Me₂)4] 
• 258327-06-9 (Et₄N)[Mo(SC₆H₂-2,4,6-Pr(i)3)(S₂C₂Me₂)4] 
• 22541-48-6 selenide 

Downstream Products

• 22541-48-6 selenide 
• 7782-49-2 selenium 
• 20601-83-6 mercury(II) selenide 
• 13940-22-2 hydrogen selenide 
• 19229-76-6 iron(III) 
• 16065-83-1 chromium (III) ion 
• 100447-70-9 Fe₃(CO)12 

Relevant articles and documents

Equilibrium and kinetic studies of Se(VI) removal by Mg-Al layered double hydroxide doped with Fe2+

Mg-Al layered double hydroxide (Mg-Al LDH) doped with Fe2+ was found to be superior to undoped Mg-Al LDH in the removal of Se(vi) from aqueous solutions. For both systems, Se(vi) as SeO42- was removed through anion exchange with intercalated Cl-. In the Fe2+-doped Mg-Al LDH, however, some of the Se(vi) was reduced to Se(iv) upon oxidation of Fe2+ to Fe3+ in the LDH host layer to produce SeO32-, which was also adsorbed by the Fe2+-doped Mg-Al LDH through anion exchange. The reduction of Se(vi) to Se(iv) is advantageous for Se(vi) removal by Fe2+-doped Mg-Al LDH due to the larger charge density of SeO32-. The Fe2+-doped Mg-Al LDH effectively removed Se(vi) from an aqueous solution because of the anion exchange properties of Mg-Al LDH and activity of Fe2+ as a reducing agent. Se(vi) removal occurs through Langmuir-type adsorption, where the maximum adsorption and equilibrium adsorption constant were 1.4 mmol g-1 and 1.6, respectively. Se(vi) removal is well expressed as a pseudo second-order reaction. The apparent rate constants at 10, 30, and 60°C were 1.2 × 10-3, 1.5 × 10-3, and 2.2 × 10-3 g mmol-1 min-1, respectively, and the apparent activation energy was 10.0 kJ mol-1. The rate-determining step is chemical adsorption through anion exchange of SeO42- and SeO32- with intercalated Cl-.

Reductive reaction of selenate with hydrazine over TiO2-supported Pt catalyst in aqueous solution

Although there has been no report on the catalytic reaction of selenate over heterogeneous catalysts in aqueous solution, we found that titania-supported Pt catalysts exhibited significantly high activity for the reduction of selenate with hydrazine. The Pt catalysts were deactivated during the reaction because of the deposition of Se metal, but showed excellent reusability. Therefore, it was firstly demonstrated that heterogeneous catalysts are effective for the removal of selenate from aqueous solution.

Haloselenate(IV) formation and selenous acid dissociation equilibria in hydrochloric and hydrofluoric acids

Raman spectroscopy has shown that the initial stages of haloselenate(IV) formation equilibria are the same in HF and HCl solutions. The constants K4 and K5, evaluated by quantitative Raman measurements, for HCl solutions are 0.015 (+/- 0.001) L2mol-2 and 0.9 (+/- 0.1)E-5 L2mol-2, respectively.These constants yield the minimum average deviation in normalized molar scattering intensity for the species formed in three regions of the spectra, 690 and 890 cm-1 (SeO stretching) and 100-450 cm-1 (deformation and SeCl stretching).Before the oneset of haloselenate(IV) formation, changes in the SeO stretching band intensities with HX concentrations occur due to repression of ionic dissociation of selenious acid Quantitative Raman measurements yield K1 = 9.8 (+/- 0.3)E-3 mol L-1.Reasons for the high value of this constant, compared to reported values, are discussed.