Foshan Weller Moisture Proof Technology Co., Ltd. is one of the most experienced manufacturers and suppliers of color changing silica gel desiccant in China. If you're going to wholesale high quality color changing silica gel desiccant, welcome to get free sample and discount information from our factory. We also accept customized orders.
China Color Changing Silica Gel Desiccant manufacturers and suppliers since 2009, with our own factory. Accept wholesale, OEM, ODM orders. Provide custom solutions.
This color changing silica gel desiccant has the characteristics of high moisture absorption and environmental friendliness. It intuitively displays the environmental humidity status through unique color changes.
Noted: We can custom desiccant for specific applications.
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Parameter |
Specification |
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Product Name |
Color Changing Silica Gel Desiccant |
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Material |
High-purity silica gel with cobalt chloride (or eco-friendly alternatives) |
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Color Indicator |
Dry State: Deep Blue / Orange |
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Moisture Absorption Rate |
Up to 30%-40% (at 90% RH, 25°C) |
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Operating Temperature |
-40°C to +200°C (short-term up to 120°C for regeneration) |
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Particle Size |
1-5 mm (standard), customizable |
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PH Value |
Neutral (7) |
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Bulk Density |
0.75 g/cm³ |
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Package Types |
Sachets: 1g, 5g, 10g, 50g, 100g, 500g, 1000g,etc.(customizable) |
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Packaging Material |
Non-woven fabric, Tyvek® paper, or laminated film (waterproof & dust-proof) |
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Regeneration Method |
Heating at 120°C for 1-2 hours (or microwave on low heat for 5 mins) |
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Safety Standards |
FDA (food-grade available), ROHS, REACH, ISO 9001 |
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Applications |
Electronics, pharmaceuticals, food storage, military, industrial packaging, etc. |
Product Types
This color changing silica gel desiccant is divided into two types: blue silcia gel and orange silica gel:
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Feature |
Blue Type |
Orange Type |
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Appearance |
Blue |
Orange |
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Key Composition |
Silica gel + Cobalt chloride (CoCl₂, moisture indicator) |
Silica gel + Methyl violet (cobalt-free for eco-friendliness) |
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Moisture Absorption |
30% absorption at RH=20% |
Slightly higher (35% at RH=20%) |
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Color Indicator |
Turn from blue to pink when saturated |
Change from orange to green upon saturation |
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Eco-Friendliness |
Contain cobalt (potentially hazardous) |
cobalt-free , more environmentally friendly |
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Common Uses |
Laboratories, precision instruments, electronics, etc. (strict humidity control) |
Food, pharmaceuticals, cosmetics,etc. (where cobalt-free options are preferred) |
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Regeneration |
Heat at 120°C for 2–3 hours (turn back to blue) |
Same as blue silica gel (heating restores original color) |
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Safety |
Avoid skin contact/inhalation |
Safer if cobalt-free, but still non-edible |
Supplementary Explanation
1. Environmental Protection Trend: Orange silica gel desiccant gradually replaces cobalt blue silica gel, especially in the food and medical fields.
2. Hygroscopic Performance: The actual hygroscopic capacity of the two is similar. The difference mainly lies in the indicator and safety.
Applications
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Parameter |
Blue Indicating Gel |
Orange Indicating Gel |
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Absorption Mechanism |
Physical adsorption (porous silica structure) |
Physical adsorption (porous silica + potential moisture-enhancing additives) |
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Standard Absorption Rate |
20-30% (at RH=20%) |
25-35% (at RH=20%) |
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High Humidity Performance |
Efficiency decreases significantly at RH>60% |
Maintain better absorption capacity at RH>60% |
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Maximum Capacity |
30-35% (by weight) |
35-40% (by weight) |
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Absorption Speed |
Moderate (ideal for stable humidity environments) |
Faster (suitable for quick moisture capture) |
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Temperature Effect |
Efficiency reduced at >40°C |
Slightly better heat resistance, but it is still affected by high temperatures. |
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Regeneration Recovery |
Maintain near-original capacity after regeneration (120°C heating) |
May experience slight capacity reduction after multiple regeneration cycles |
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Optimal Humidity Range |
10-50% RH (peak performance) |
10-60% RH (wider effective range) |
Key Notes
1. Actual Moisture Absorption Difference
The moisture absorption capacity of the two is similar. Orange indicating gel performs slightly better under high humidity.
2. Dynamic Moisture Absorption
The moisture absorption rate of color changing silica gel desiccant is affected by ambient temperature, humidity, and airflow. Orange indicating gel may reach equilibrium faster.
3. Reusable
Blue indicating gel is more suitable for long-term recycling due to its high stability. Too many regenerations of orange indicating gel may reduce performance.
If you are interested in our color changing 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.
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Product Range |
moisture-proof, mildew-proof, odor-proof and rust-proof products. |
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Applications |
designed for residential, commercial and industrial use. used for product packaging, transportation, and warehousing in different industries. |
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Service |
Accept wholesale, OEM, ODM orders; Provide custom solutions. |
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Certifications |
SGS, RoHS, REACH, FDA, DMF; SIMT,MIL-D-3464E, DIN55473, ISO9001, ISO14001, BSCI. |
Product Details and Summary
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Product Type |
silica gel desiccant (moisture absorbing material) |
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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) |
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Indicator Function |
You can choose silica gel with color indication function, to achieve a more convenient reminder function. |
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Main Components |
silicon dioxide (SiO₂); Content ≥ 98% |
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Appearance |
granular, spherical, powdered, beads crystals, sand, etc. |
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Colors |
transparent, translucent, white, blue, or orange |
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Particle Size |
1-3mm, 2-4mm, 3-5mm; or custom sizes |
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Bulk Density |
approximately 700-800 kg/m³ |
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Surface Area |
700-800 m²/g |
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Pore Volume |
0.4-0.8 cm³/g |
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Applicable Humidity Level |
20%-90% RH |
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Operating Temperature Range |
-40 ℃ to 200 ℃ (long-term stability) |
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Maximum Moisture Absorption Rate |
30%-40% of its own weight |
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Physical Properties |
stable internal structure. no expansion or liquefaction. not easily crushed. dust-free. |
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pH |
4-8 |
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Chemical Properties |
chemically inert; It will not chemically react with the inside products. |
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Human-Friendly Feature |
odorless and non-toxic. It meets food grade standards. |
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Environmentally Friendly Feature |
using packaging paper and materials that are biodegradable within two years. It can be discarded for use as fertilizer. |
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Regeneration Temperature |
80℃-150 ℃ ( It can be reused after heating for 2-4 hours.) |
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Packaging Material |
breathable material with strong sealing properties. You can customize packaging materials according to your needs. |
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Printing |
You can custom printed text, pictures, logo for better brand images. |
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Packaging Capacity |
1g, 2g, 5g, 10g, 50g, 100g, 500g, 1000g; or custom capacity |
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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. |