DUSIL WM133

Dusil WM133 is a continuous network of corner-sharing SiO4 tetrahedra where each oxygen bridges two tetrahedra (i.e. only Q4 speciation). 
However, a more complex system might contain 75% Q3 (tetrahedra with one free non-bridging oxygen) and 25% Q2 (two non-bridging oxygens). 
For Dusil WM133, the first diffraction peak, Q1, has been associated with intermediate-range ordering with a periodicity of 2π/Q1 ~ 6 Å. 

CAS:    10279-57-9
MF:    H2O3Si
MW:    78.1
EINECS:    600-358-3

Synonyms
LUDOX(R) TMA COLLOIDAL SILICA;LUDOX(R) AM-30 COLLOIDAL SILICA;LUDOX(R) AS-30 COLLOIDAL SILICA;LUDOX(R) AS-40 COLLOIDAL SILICA;LUDOX(R) CL COLLOIDAL SILICA;LUDOX(R) CL-X COLLOIDAL SILICA;LUDOX(R) HS-30 COLLOIDAL SILICA;LUDOX(R) HS-40 COLLODIAL SILICA

This ordering beyond the first few nearest neighbour tetrahedra arises from the boundaries between successions of cages comprising a 3-D covalent network structure. 
Therefore, the position and shape of the first sharp diffraction peak Q1 can provide information on different-sized ring distributions within the material. 
The second diffraction peak at position Q2 has been linked to chemical or extended range ordering with a periodicity of 2π/Q2 ~ 3 Å, and the local Si–O–Si and O–Si–O bond-angle distributions can persist to distances as large as > 5 Å.

Description: Matting agent, organic treated
Main application: High performance matting agent base on organically treated amorphous silica.

Dusil WM133 Chemical Properties
Melting point: 1610 °C(lit.)
Boiling point: >100 °C(lit.)
Density: 2.6 g/mL at 25 °C(lit.)
Bulk density: 60-600kg/m3
Refractive index: n20/D 1.544(lit.)
Storage temp.: no restrictions.
Form: tablets (~0.5 g each)
PH: 3.0-8.0 (3.3% in water)
Water Solubility: Insoluble in water.
Exposure limits    NIOSH: IDLH 3000 mg/m3; TWA 6 mg/m3
InChI: InChI=1S/O2Si.H2O/c1-3-2;/h;1H2
InChIKey: LRCFXGAMWKDGLA-UHFFFAOYSA-N
EPA Substance Registry System: Dusil WM133 (10279-57-9)

Specifications :
1. Particle size by Malvern 6.0 - 7.0 μm
2. pH 6.0 - 7.0
3. Moisture content 3 wt% Max.
4. Oil Absorption 250 - 280 ml / 100 g
5. Appearance White powder

Properties:
▪ Excellent matting efficiency and surface smoothness
▪ Good dispersion performance
▪ Best suspension behaviour
▪ Outstanding in appearance
▪ Less influence on viscosity
▪ Universal to use
▪ Minimal effect on weathering
▪ No effect on drying properties

Uses    
Typical properties: Dusil WM133 is used as a catalyst support material having a high surface area. 
Dusil WM133 acts as a medium to which catalyst is affixed. 
Several metals such as platinum, rhodium, ruthenium, silver, copper, nickel, iron, manganese, cobalt, tungsten and gold are supported over silicon dioxide and used as a catalyst in synthetic chemistry for various applications. 
For example, silica-supported gold catalysts is used for carbon monoxide oxidation by a solution-based technique.