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

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

Silica Gel Blue Suppliers

This silica gel blue has a very convenient color indication function. In the dry state, it is dark blue. As the moisture absorption increases, its color gradually changes to pink. This color change intuitively shows the moisture absorption saturation. This feature allows users to promptly determine whether the desiccant has failed, and when it needs to be replaced or regenerated (heated to restore to blue). This desiccant ensures continuous and efficient moisture protection. It is particularly suitable for the storage of important items that are sensitive to humidity.

Noted: We can custom desiccant for specific applications.

Specification	Parameter
Chemical Composition	Silica Gel Blue with cobalt chloride indicator (blue to pink during moisture absorption)
Appearance	Blue granules
Particle Size	2–5 mm; or custom sizes
pH Value	Neutral (pH 4–7)
Indicator Color Change	Cobalt chloride changes from blue (dry state) to pink (moist state)
Moisture Absorption	It can absorb up to 25–35% of its own weight.
Bulk Density	About 720 kg/m³
Heat Resistance	Effective up to temperatures of approximately +120°C
Reusability	It can be regenerated through heating at 100–120°C.
Applications	Used in desiccation and moisture control in industries such as electronics, packaging, etc.

Standard Moisture Absorption Rate

Under the environment of 25℃ and relative humidity (RH) 80%, the moisture absorption capacity can reach ≥30%. That is, every 100g of desiccant can absorb more than 30g of water.

Moisture Absorption Performance Under Different Humidity

When RH is 20%, the moisture absorption rate is about 5%~8%;
When RH is 50%, the moisture absorption rate is about 15%~20%;
When RH is 90%, the moisture absorption rate can exceed 35%.

Temperature Adaptability

It can maintain stable moisture absorption performance in the range of -40℃ to 200℃.

Practical Applications

This product is best suited for use in scenarios that are sensitive to humidity and require real-time monitoring of the drying state. These include moisture protection for precision instruments and electronic equipment, storage of medicines and vaccines, preservation of dry food, mildew prevention of important document collections, and humidity control in industrial transportation. Due to its unique color-changing function, this desiccant can intuitively display the moisture absorption state, ensuring that key items are always in the best drying environment.

Recommended Dosage of Silica Gel Blue

Container/Space Volume	Recommended Amount	Example Applications
Below 1 liter	10–20 g	Small medicine bottles, camera cases, electronics packaging, etc.
1–10 liters	20–100 g	Toolboxes, shoeboxes, small storage containers, etc.
10–50 liters	100–500 g	Suitcases, medium-sized sealed boxes, filing cabinets, etc.
50–100 liters	500–1000 g (0.5–1 kg)	Large storage bins, wardrobes, equipment packaging, etc.
Over 100 liters	1–1.5 kg per cubic meter	Warehouses, shipping containers, high-humidity areas, etc.

Notes

1. Humidity-Sensitive Scenarios (such as precision instruments, valuables): The dosage can be appropriately increased (+20%-50%).

2. If the silica gel blue changes from blue to pink, it indicates that it is saturated with moisture. It needs to be replaced or regenerated (dried at 120℃).

3. The effect is better in a closed environment. The container must be sealed.

If you are interested in our silica gel blue, 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.