English
Cobalt-Free Orange & Blue Color-Changing Silica Gel: Eco-Friendly Moisture Indicator Desiccant
Created on 08.26
Introduction: Safe, Visible Moisture Protection
Moisture damage is one of the most common causes of product failure during storage and transportation. Electronics corrode, precision instruments lose accuracy, metal parts rust, and pharmaceuticals or food products degrade when humidity is not controlled.
Traditional blue silica gel has been widely used as an indicating desiccant because it changes color when saturated. However, conventional blue silica gel often contains cobalt chloride, a substance that is toxic and harmful to the environment. As global regulations and buyer requirements become stricter, many industries are switching to cobalt-free color-changing silica gel.
Our Orange Silicone—also available as cobalt-free blue silica gel—offers a safe, eco-friendly, and highly effective alternative. It absorbs moisture and clearly indicates its saturation status through a visible color change, helping users know exactly when to replace or regenerate the desiccant.
What Is Cobalt-Free Color-Changing Silica Gel?
Cobalt-free color-changing silica gel is a highly porous form of silicon dioxide (SiO₂) that contains a non-toxic humidity indicator. It is available in bead or block form and is designed for both moisture absorption and humidity indication.
Unlike traditional cobalt-containing blue silica gel, our orange and blue cobalt-free versions are non-toxic, harmless, and environmentally friendly. They are suitable for moisture-proof packaging in sensitive industries such as electronics, pharmaceuticals, food, and precision equipment.
Available color options:
- Orange-Green:
turns from orange to green when absorbing moisture.
- Orange-None:
turns from orange to transparent when absorbing moisture.
- Blue Cobalt-Free:
also available; blue color-changing silica gel can be produced without cobalt. Please confirm your desired color change with our team.
Key Features
- Cobalt-free and non-toxic:
safer than traditional blue silica gel.
- Clear color indication:
easy to see when replacement or regeneration is needed.
- High adsorption capacity:
effectively absorbs moisture from the air.
- Strong moisture protection:
helps prevent corrosion, mold, oxidation, and quality loss.
- Eco-friendly:
suitable for markets with strict environmental and safety requirements.
- Customizable:
sizes, packaging, and specifications can be tailored to your application.
Technical Specifications
Item | Specifications | |
Orange-Green | Orange-None |
|
Adsorption @ T: 25°C, 48 h | RH=20%: 8 | RH=20%: 8 |
RH=50%: 22 | RH=50%: 22 |
|
RH=90%: 32 | RH=90%: 32 |
|
SiO₂, %, ≥ | 98 | 98 |
Pore Size, Å | 20–30 | 20–30 |
Loose Bulk Density, g/L, ≥ | 720 | 720 |
Loss on Heating, %, ≤ | 3.0 | 3.0 |
Particle Size Compliance Rate, %, ≥ | 98 | 98 |
Note: The table above shows typical data for orange cobalt-free silica gel. Blue cobalt-free grades are also available. Specifications can be customized according to your requirements.
Applications
Cobalt-free orange and blue color-changing silica gel is widely used for moisture absorption, moisture protection, and humidity indication in:
- Electronic products and PCBs
- Precision instruments and optical equipment
- Mechanical parts and metal products
- Pharmaceuticals and health products
- Food packaging
- Industrial moisture-proof packaging
- Container transportation
- Electrical equipment and control cabinets
- Transformer breathers
- Various moisture-proof sealing applications
It is especially suitable for buyers who need the visual convenience of indicating silica gel but cannot accept cobalt-containing products.
Orange-Green vs. Orange-None: Which One to Choose?
Type | Initial Color | After Moisture Absorption | Best For |
Orange-Green | Orange | Green | Applications needing a strong, obvious color contrast |
Orange-None | Orange | Transparent | Applications where transparency or clean appearance is preferred |
Both types offer high adsorption performance and reliable humidity indication. If you are not sure which type fits your product, our team can recommend the best option based on your packaging, climate, and shelf-life requirements.
Sizes and Packaging
Available sizes:
0.5–1.5 mm, 1–3 mm, 2–4 mm, 3–5 mm, 2–5 mm, 4–8 mm.
Standard packaging:
- 25 kg per compound bag
- 150 kg per drum
Customization:
Packing and size may be customized per your specific requirements.
Why Choose Cobalt-Free Silica Gel?
Traditional blue indicating silica gel contains cobalt chloride, which has raised environmental and health concerns in many markets. Cobalt-free silica gel provides a safer alternative without sacrificing moisture absorption or color indication.
By switching to cobalt-free orange or blue silica gel, you can:
- Improve product safety for electronics, food, and pharmaceutical packaging.
- Meet stricter environmental and customer requirements.
- Reduce regulatory risks associated with cobalt-containing desiccants.
- Maintain clear moisture indication for easy quality control.
FAQ
Q1: Does orange silica gel contain cobalt chloride?
No. Our orange silica gel is cobalt-free, non-toxic, and environmentally friendly.
Q2: What color does orange silica gel change to?
Orange-Green changes from orange to green. Orange-None changes from orange to transparent.
Q3: Can you supply blue silica gel without cobalt?
Yes. Blue cobalt-free color-changing silica gel is also available. Please contact us with your required color change and specifications.
Q4: What sizes are available?
We offer 0.5–1.5 mm, 1–3 mm, 2–4 mm, 3–5 mm, 2–5 mm, and 4–8 mm. Custom sizes are available.
Q5: What is the packaging?
Standard packaging is 25 kg per compound bag or 150 kg per drum. Custom packaging is available upon request.
Q6: Can it be regenerated?
Yes, indicating silica gel can generally be regenerated under proper conditions. Recommended regeneration conditions depend on the application. Please contact us for guidance.
Contact Us
Need a reliable cobalt-free orange or blue color-changing silica gel supplier? We offer factory-direct pricing, custom sizes, flexible packaging, and fast delivery.
📧 Email: [info@jusenchem.com]
📞 WhatsApp: [+86 18954690080]
🌐 Website: [www.jusenchem.com]
Contact us today for a free sample and quotation.
Leave your information and
we will contact you.
we will contact you.
WhatsApp