Molecular sieves, 4 Å
SIGALD/334308 - pellets, 1.6 mm diameter
CAS Number: 70955-01-0
MDL Number: MFCD00131613
Linear Formula: Na12[(AlO2)12(SiO2)12] · xH2O
Product Type: Chemical
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material.
This image depicts SKU: 334308-500G
This image depicts SKU: 334308-500G
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material.
This image depicts SKU: 334308-1KG
This image depicts SKU: 334308-1KG
| diameter | 1.6 mm |
| form | pellets |
| pore size | 4 Å |
| Quality Level | 100  |
| General description: | Choosing a Molecular Sieve: 1. The preferential adsorption of one molecule over another depends upon pore diameter and mesh size. 2. The dynamic capacity of the silica gel for adsorbing a particular compound is governed by the internal surface area; the greater the surface area, the greater the dynamic capacity. 3. Rate of adsorption and sharpness of resolution are dependent chiefly on particle size and column packing; a fine particle size gives optimum sharpness of resolution. 4. Liquids are most readily adsorbed from solvents in which they are least soluble; a good solvent makes a good desorbing agent. 5. Highly polar liquids are readily adsorbed. Compounds having hydroxyl groups, or containing oxygen are strongly adsorbed. 6. For similar compounds, the higher the molecular weight the higher the selectivity. 7. For hydrocarbons of similar molecular weight, adsorptivity increases with the number of double bonds. |
| General description: | Regeneration or Activation: A saturated molecular sieve can be restored to its original capacity by regeneration, the principle of which involves changing the conditions surrounding the adsorbent to correspond to a very low equilibrium capacity. In general, the greater the difference between the equilibrium capacities of adsorption and regeneration, the more rapid and complete the regeneration. The sieve may be regenerated in one of four ways: 1. Thermal reactivation –The maximum regeneration temperature for Silica is 300°C. 2. Pressure reactivation 3. Passing an appropriate fluid through the gel bed at normal temperature and pressure. 4. Displacement of adsorbates by passing a high concentration of molecules in a fluid through the bed. |
| Packaging: | 1 kg in poly bottle |
| Packaging: | 500 g in poly bottle |
| Symbol |  GHS07 |
| Signal word | Warning |
| Hazard statements | H315 - H319 - H335 |
| Precautionary statements | P261 - P305 + P351 + P338 |
| Hazard Codes | Xi |
| Risk Statements | 36/37/38 |
| Safety Statements | 26 |
| RIDADR | NONH for all modes of transport |
| WGK Germany | WGK 3 |
| Flash Point(F) | Not applicable |
| Flash Point(C) | Not applicable |
| UNSPSC | 23201100 |