| CAS No.: | 112926-00-8 |
|---|---|
| Formula: | Sio2 |
| EINECS: | 231-545-4 |
| Shape: | Beads |
| Drying Method: | Static Drying |
| Kind: | Montmorillonite Desiccant |
| Samples: |
|---|
| Customization: |
|---|
Suppliers with verified business licenses
Audited Supplier Nicepak has the immediate availability and inventory of various desiccants used in diagnostic test kits, including COVD-19 test kits, to enable these test kits to remain effective during shipping.
Bentonite clay is an abundant and naturally-occurring mineral that results from the weathering and sedimentation of volcanic ash deposits. Its principal ingredient is calcium montmorillonite, a highly adsorbent, chemically inert and non-corrosive substance. When mined from the ground, then processed and dried into the form of free-flowing granules, bentonite clay attracts and binds water vapor readily within its complex and highly layered structure, making it a highly effective desiccant.
Desiccant Performance
In terms of their capabilities and performance as desiccants, bentonite clay and silica gel have numerous similarities. Both are highly adsorbent materials. This means that even at full water vapor capacity, both remain dry and free-flowing, without any apparent change in size, shape or texture. And, both of these desiccants can be "reactivated" by oven-drying them to remove retained water vapor between uses.
They are also quite similar in terms of "unit" weight and relative adsorption performance. Desiccants are measured in "units" according to mili tary and industry specifications including MIL-D-3464 (U.S), DIN 55473 (Germany) and AFNOR NF H00-321 (France). The MIL and DIN specifications define a unit as the amount of desiccant that will, at a temperature of 25° C, adsorb 3 g of water vapor at 20% relative humidity and 6 g of water vapor at 40% relative humidity. By this standard, a unit of bentonite clay desiccant weighs about 33 grams, while a unit of silica gel weighs about 26 grams. Both will adsorb water vapor equivalent to between 30 and 40 percent of their unit weight. (Note: the AFNOR NF H00-321 specification defines a desiccant unit with 100 g moisture adsorption.)
Although the adsorption properties of bentonite clay and silica gel desiccants are comparable on a unit for-unit basis, tests show that bentonite clay offers higher adsorption capacity in the most common and relevant package conditions. The adsorption capacity of bentonite is substantial at low humidity levels and increases with increasing relative humidity. Silica gel behaves similarly, but becomes even more adsorbent at higher levels of relative humidity. At these higher humidity levels, its very high rate of adsorption can, at times, make silica gel more difficult to handle.
-------------------------------------
Silica gel is used for pharmaceutical, medical products, medical devices, nutraceuticals and test kits to maintain the integrity of their products from supply chain to end customer, rapid test kits desiccants are available in silica gel, clay, molecular sieve, and activated carbon.
Non-Indicating silica gel will not change its color while absorbing moisture. This is commonly used in packets. Mainly, White silica gel beads and crystals come under the non-indicating category.
White silica gel prefers to absorb water and other substantial-quality containing HC1, CO2, gaso line hydrocarbons, nitrogen, sulfur and aromatics compounds with a high capacity of moisture. Also, white silica gel helps in preventing moisture, spoilage, and growth of mold from packaging materials.
Silica gel crystals are always used in the dry product even when they are saturated with water and it is the most famous desiccants that are been used from many applications such as pharmaceuticals, compressed air dryers, electronics product packaging, dehumidification process, dehydrated foods etc.
Indicating silica gel helps the users to quickly determine whether the desiccant needs to be replaced or recharged.
It provides a rapid detection method by changing color as it absorbs moisture and eventually saturates. This is mainly used in absorbing moisture from gas and air.
Particle size: 0.5-1.5 or 1-4(mm)
Water content: less than 2%
Moisture absorption rate: 20%-25%
Wrapping film: tyvek, non-woven or OPP
| Weight (grams) | Size L*W(mm) | Packaging (pcs/ctn) | Carton size (cm) |
| 1 | 40*30 | 20000 | 45*30*47 |
| 2 | 50*35 | 10000 | 45*30*47 |
| 3 | 50*45 | 6000 | 45*30*36 |
| 5 | 60*45 | 4000 | 45*30*36 |
| 10 | 60*70 | 2000 | 45*30*30 |
| 20 | 85*60 | 1000 | 45*30*33 |
| 25 | 80*90 | 800 | 45*30*30 |
| 30 | 80*97 | 600 | 45*30*25 |
| 40 | 80*100 | 500 | 45*30*27 |
| 50 | 80*122 | 400 | 40*30*25 |
| 100 | 100*135 | 200 | 45*30*27 |
| 200 | 140*145 | 100 | 45*30*27 |
| 250 | 140*145 | 100 | 45*30*27 |
| 500 | 190*200 | 40 | 45*30*30 |
| 1000 | 190*205 | 20 | 40*30*20 |
0.5g and 1g are most poppular for rapid test kits used.
For pricing, please provide following details:
Grams of absorbent per sachet
Sachet dimensions
Wrapping paper type
Quantity(pcs)
Any printing details
Suppliers with verified business licenses
Audited Supplier 
){kind=link}
){kind=link}