Silica Gel Desiccant Manufacturer in China

Silica Gel Desiccant Manufacturer - Image 2

Silica Gel Desiccant Manufacturer

Product Name: Silica Gel Desiccant

CAS No.: 112926-00-8

Grade: Desiccant Grade

Product Type: Type A silica gel

Product Series: White Silica Gel / Blue Silica Gel / Orange Silica Gel

Synonymous Names: Synthetic Amorphous Silica Gel; Desiccant Silica Gel; Silica Gel Beads; Indicating Silica Gel; Hydrated Silica; narrow pore silica gel

Inquiry

Description
Inquiry

Product Overview

Foconsci supplies Type A fine-pore silica gel desiccants for moisture protection and for removing water vapor from air and industrial gases. Our silica gel desiccant range includes white silica gel, blue indicating silica gel and orange indicating silica gel.

White silica gel is the basic non-indicating grade. It is mainly used as the filling material for desiccant sachets that protect electronic products, instruments, metal parts, leather goods and other packaged products from moisture during storage and transportation.

Blue silica gel is one of our main desiccant products. It is blue when dry and gradually turns pink after adsorbing moisture. This clear color change allows users to see when the desiccant needs to be replaced or regenerated. It is mainly used in transformer breathers, air dryers and industrial drying equipment.

Orange silica gel is our newly developed environmentally friendly indicator. It is an upgraded product of blue silica gel. It retains the visible moisture-indication function but uses a cobalt-free composite moisture indicator, reducing the environmental and handling concerns associated with conventional cobalt-based indicators. The beads are orange when dry and turn green after adsorbing moisture.

Unlike calcium chloride desiccants, silica gel stays solid after absorbing moisture. It does not turn into liquid brine. This reduces the risk of liquid leakage around electronics, optical equipment and metal parts.

Silica gel beads can be filled directly into transformer breathers, drying columns and desiccant cartridges or used as the raw material for desiccant sachets. When a visible moisture signal is required but a full indicating fill is unnecessary, white silica gel can be blended with a smaller amount of blue or orange indicating silica gel.

Product Specification

Item	White Silica Gel	Blue Silica Gel	Orange Silica Gel
Silica gel type	Type A, fine-pore	Type A, fine-pore	Type A, fine-pore
Appearance	White spherical glass-like beads	Blue beads	Orange beads
Particle size	0.5–1 mm, 0.5–1.5 mm, 2–4 mm, 2–5 mm, 4–8 mm	1-3mm, 2-4mm, 3-5mm	1-3mm, 2-4mm, 3-5mm
Adsorption capacity at 20% RH	>11.2%	≥8.0%	≥8.0% (typical: 12.2%)
Adsorption capacity at 35% RH	—	≥13.0%	≥14.0% (typical: 19.5%)
Adsorption capacity at 50% RH	>29.2%	≥20.0% (typical: 22.0%)	≥22.0% (typical: 27.0%)
Adsorption capacity at 90% RH	>37.6%	Typical: 32.0%	≥30.0% (typical: 36.3%)
Rattler loss	—	≤10.0% (typical: ≤1.0%)	≤10.0% (typical: ≤1.0%)
Qualified particle size ratio	≥90%	≥96%	≥96%
Loss on heating	≤1.0%	≤5.0% (typical: ≤2.0%)	≤5.0% (typical: ≤2.0%)
Bulk density	784 g/L	—	≥750 g/L (typical: 847 g/L)
Pore volume	0.35–0.45 mL/g	—	—
Specific surface area	650–800 m²/g	—	—
pH	4	—	—
Specific heat	0.92 kJ/(kg·°C)	—	—
Electrical resistivity	5,630 Ω·cm	—	—
Thermal conductivity	0.63 kJ/(m·h·°C)	—	—
Color at 20% RH	White; no color change	Blue or light blue	Light yellow
Color at 35% RH	White; no color change	Purple or purplish red	Light brown-green
Color at 50% RH	White; no color change	—	Light green
Color at 90% RH	White; no color change	Light red	—

Packaging and Storage

Packaging: 25 kg bag or fiber drum

Silica gel begins adsorbing moisture as soon as the package is opened. Open the bag only when the material is ready to be filled into sachets, breathers or drying equipment.

Store silica gel in a cool, dry and ventilated warehouse. Keep the original packaging tightly closed and protect it from water, steam and humid air.