Medical Grade DMF Free 4A Molecular Sieve Dessicant in Non-Woven Fabric (1g~10g packet)

• CAS No.: 12173-28-3
• Formula: 2/3K2o.1/3na2o.Al2O3.2sio2.9/2H2O
• EINECS: 215-684-8
• Shape: Beads
• Drying Method: Static Drying
• Kind: Silica-Gel Desiccant
• Sorbent: Molecular Sieves
• Desiccant: Physical Desiccant
• Moisture Absorption Capacity: 28%-33%
• Bead Size: 0.5-2, 1-3 or 2-4(mm)
• Color: Beige
• Packet Dimension: 20*40(mm) or 16*42(mm)
• Applications: Rapid Test Kits, Food and Pharmaceuticals, etc
• Packing: Vacuum
• Packet Material: Non-Woven or OPP or Tyvek
• Transport Package: Cartons and Pallets
• Specification: 0.5g, 1g, 2g, 5g, 10g, etc
• Trademark: Customized
• Origin: China
• HS Code: 2839900090
• Production Capacity: 1million PCS/Day

Product Description

 

Product Description

Molecular sieve is the best desiccant based on technical performance characteristics. Its ability to adsorb moisture, in this case water vapor, is so pronounced that it can remove trapped H20 molecules from a fully saturated silica gel bead, which in turn changes the silica gel back to its original Cobalt blue color.

Molecular sieves are synthetic porous crystalline aluminosilicates which have been engineered to have a very strong affinity for specifically sized molecules. The definitive feature of the molecular sieve structure, as compared to other desiccant medias, is the uniformity of the pore size openings.

There is no pore size distribution with molecular sieves, as part of the manufacturing process the pore size on the molecular sieve particles can be controlled. The most commonly used pore size is 4 angstroms (4A) although 3 angstroms (3A), 5 angstroms (5A) and 10 angstroms (13X) are available. This distinctive feature allows for the selection of a molecular sieve product which can adsorb water vapor yet exclude most other molecules such as volatile organic compounds (VOCs) which may or may not be present in the package.

For example: 3A molecular sieve's structure, which if you will remember has a 3 angstrom pore opening, allows water vapor adsorption but excludes most hydrocarbons. 3A is good for ammonia (NH3), water vapor (H2O) and polar liquids. 4A molecular sieve has a slightly higher water vapor capacity but adsorbs molecules as large as butane. 4A is good for water vapor (H2O); carbon dioxide (CO2); sulfur dioxide (SO2); hydrogen sulfide (H2S); ethylene (C2H4); ethane (C2H6); propene (C3H6) and ethanol (C2H6O). 5A molecular sieve adsorbs normal (linear) hydrocarbons to n-C4H10, alcohols to C4HgOH, mercaptans to C4HgSH. 5 angstrom molecular sieve will not adsorb iso compounds or rings greater than C4. 10A molecular sieve (13X) adsorbs di-n-butylamine (not tri-n-butylamine) and is useful for drying HPMA.

The selective adsorption characteristics of molecular sieves can be useful when it is necessary to dry a package or environment without removing other desirable compounds within the system. Molecular sieve can trap water vapor to temperatures well past 225°C in some cases, and due to its high affinity for water vapor, molecular sieve is able to bring the relative humidity (RH) in environments down to as low as 1% RH.

In Europe molecular sieve is used in pharmaceutical applications. In the United States it is often the desiccant of choice for pharmaceuticals and bio-chemicals and/or reagents. Although molecular sieve is sligthtly higher in cost per unit due to its extremely large range of adsorptive capabilities and high capacity at low relative humiddity it is often the best value.

Lack of government approval for the molecular sieves in food and drug packaging has unfortunately limited its more widespread use. Independent testing suggests that molecular sieves meet or exceed government requirements. Presumably, however, the industry has been unwilling to fund the expensive and time consuming testing that is required for government approval.

Detailed Photos

 

Product Parameters

Bead size: 1.7-2.5 or 3.0-5.0(mm)
Water content: less than 2%
Moisture absorption rate: 28%
Wrapping film: tyvek, non-woven or OPP 

Packaging & Shipping

 

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

 

 

Applications

1) Drying of various liquids (such as ethanol)
2) Drying of the air
3) Drying of refrigerant
4) Drying of natural gas and methane gas
5) Drying of unsaturated hydrocarbon and cracking gas, ethylene, acetylene, propylene, butadiene
6) 0.5g and 1g are most poppular for rapid test kits used.
7) For other industries used such as food/medical/garment/furniture/shoes/electronics etc, we can provide any sizes from 0.5g to 1000g.

 
 

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