Foshan Weller Moisture Proof Technology Co., Ltd. is one of the most experienced manufacturers and suppliers of type a silica gel desiccant in China. If you're going to wholesale high quality type a silica gel desiccant, welcome to get free sample and discount information from our factory. We also accept customized orders.

China Type A Silica Gel Desiccant manufacturers and suppliers since 2009, with our own factory. Accept wholesale, OEM, ODM orders. Provide custom solutions.

Type A Silica Gel Desiccant Suppliers

This Type A silica gel desiccant is a highly porous, amorphous form of silicon dioxide (SiO₂) with a uniform micropore structure (average pore diameter: 1–3 nm). It is produced through the gelation of sodium silicate with sulfuric acid, followed by drying and activation to create a high-surface-area adsorbent.

Noted: We can custom desiccant for specific applications.

Parameter	Specification
Product Type	Type A Silica Gel Desiccant
Chemical Formula	SiO₂·nH₂O
Appearance	Transparent or translucent beads
Pore Diameter	1-3 nm
Surface Area	650-800 m²/g
Bulk Density	0.65-0.75 g/cm³
Porosity	≥50%
Moisture Adsorption (20% RH)	≥10% (25°C)
Moisture Adsorption (90% RH)	≥30% (25°C)
Heat Resistance	≤200°C
pH (5% aqueous solution)	4-6
Initial Moisture Content	≤5%
Particle Size	1-5 mm (customizable)
Applications	Desiccant, catalyst support, chromatography,etc.

Moisture Absorption Capacity

1. High Hydrophilicity

Its porous structure (average pore size 1-3 nm) and abundant surface hydroxyl groups enable strong water affinity, achieving equilibrium adsorption of over 30% of its own weight at 25°C, with significantly higher efficiency at RH >60%.

2. Rapid Adsorption Kinetics

With a large surface area (650–800 m²/g), it can absorb >90% moisture within 30 minutes under 50% RH, making it ideal for fast dehumidification.

3. Selective Adsorption

It preferentially adsorbs polar molecules (e.g., water, alcohols), while minimizing interaction with nonpolar organics, ensuring high-purity drying in solvents like ethanol.

4. Thermal Stability & Regenerability

This This Type A silica gel desiccant can be fully regenerated at 150°C for 2 hours, retaining 85% capacity after 5 cycles.

Excellent Physical Properties

1. High Mechanical Strength

Compact internal structure. It has strong pressure resistance and wear resistance. It can withstand large external forces without being easily damaged

2. Low Powdering Rate

During use or transportation, this Type A silica gel desiccant is not easy to break and generate dust. It easily maintains cleanliness and stability.

3. Durability

Suitable for repeated adsorption or high-pressure environment. After long-term use, it can still maintain particle integrity.

Safety and Environmental Protection

1. Chemical Inertness

Non-toxic and odorless. Insoluble in water and organic solvents. At room temperature, this Type A silica gel desiccant does not react with most substances. It shows stable properties.

2. Biological Safety

Non-Toxic: Meet FDA standards. It can directly contact food and medicine.

Non-Irritating: Under normal use, it will not release harmful substances, but dust inhalation should be avoided.

3. Environmental Protection

It can be recycled or landfilled. Do not pollute the environment.

Applications

Application Scenario	Description
Moisture Absorption & Desiccation	Used for drying electronics, precision instruments, pharmaceuticals, and food packaging
Gas Purification	Dehydrate compressed air, industrial gases (e.g., oxygen, nitrogen); Remove moisture/organic vapors
Laboratory Drying	Act as a desiccant for chemical experiments, hygroscopic reagents, or as an adsorbent in chromatography
Food & Pharmaceutical Packaging	FDA-compliant grade for moisture control in medicines, supplements, and dry food storage
Household Moisture Protection	Prevent mold in closets, shoe cabinets, and storage boxes by absorbing ambient humidity
Industrial Anti-Caking	Added to powdered products (e.g., fertilizers, dyes), to prevent clumping during storage/transport
Electronics Protection	Protect cameras, lenses, drones, and PCBs from humidity damage
Automotive Parts Packaging	Prevent rust in brake pads, filters, and metal components during shipping/warehousing
Aerospace & Aviation	Control humidity in avionics and spacecraft equipment under extreme conditions

If you are interested in our Type A Silica Gel Desiccant, please feel free to contact us !

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About Us

Foshan Weller Moisture-Proof Technology Co., Ltd. was established in 2009. We are a professional manufacturer and supplier in China, with an factory of over 8,000 square meters.

Product Range	moisture-proof, mildew-proof, odor-proof and rust-proof products.
Applications	designed for residential, commercial and industrial use. used for product packaging, transportation, and warehousing in different industries.
Service	Accept wholesale, OEM, ODM orders; Provide custom solutions.
Certifications	SGS, RoHS, REACH, FDA, DMF; SIMT,MIL-D-3464E, DIN55473, ISO9001, ISO14001, BSCI.

Product Details and Summary

Product Type	silica gel desiccant (moisture absorbing material)
Classification	1. non-indicating silica gel 2. indicating silica gel (1) blue indicating silica gel (blue to pink; containing cobalt chloride) (2) orange indicating silica gel (orange to green; cobalt free and environmentally friendly)
Indicator Function	You can choose silica gel with color indication function, to achieve a more convenient reminder function.
Main Components	silicon dioxide (SiO₂); Content ≥ 98%
Appearance	granular, spherical, powdered, beads crystals, sand, etc.
Colors	transparent, translucent, white, blue, or orange
Particle Size	1-3mm, 2-4mm, 3-5mm; or custom sizes
Bulk Density	approximately 700-800 kg/m³
Surface Area	700-800 m²/g
Pore Volume	0.4-0.8 cm³/g
Applicable Humidity Level	20%-90% RH
Operating Temperature Range	-40 ℃ to 200 ℃ (long-term stability)
Maximum Moisture Absorption Rate	30%-40% of its own weight
Physical Properties	stable internal structure. no expansion or liquefaction. not easily crushed. dust-free.
pH	4-8
Chemical Properties	chemically inert; It will not chemically react with the inside products.
Human-Friendly Feature	odorless and non-toxic. It meets food grade standards.
Environmentally Friendly Feature	using packaging paper and materials that are biodegradable within two years. It can be discarded for use as fertilizer.
Regeneration Temperature	80℃-150 ℃ ( It can be reused after heating for 2-4 hours.)
Packaging Material	breathable material with strong sealing properties. You can customize packaging materials according to your needs.
Printing	You can custom printed text, pictures, logo for better brand images.
Packaging Capacity	1g, 2g, 5g, 10g, 50g, 100g, 500g, 1000g; or custom capacity
Storage	It should be tightly sealed and stored in a cool, dry place; away from direct sunlight and chemical pollution.
Certifications	SGS, RoHS, REACH, FDA, DMF; SIMT,MIL-D-3464E, DIN55473, ISO9001, ISO14001, BSCI.