Transparent, blue and orange silica gel are all high-activity adsorptive desiccants with silicon dioxide (SiO2·nH2O) as the main component, differing in the addition of color-changing indicators, ingredient formulations and application scenarios.
1. Transparent Silica Gel (Non-indicative)
It appears as colorless or translucent glassy particles (mainly spherical), without any color-changing indicators added. It physically adsorbs moisture through its microporous structure, with almost no change in appearance after moisture absorption (may turn milky white when fully saturated for a long time).
- Composition: Pure fine-pore silica gel, non-toxic, odorless and chemically stable.
- Color Change: No obvious color variation; saturation cannot be judged visually.
- Applications: General moisture-proofing for food, ph-armaceuticals, electronics, leather, etc., and can be in direct contact with food (FDA approved).
- Regeneration: Reusable after drying at 100-120ºC for 1-2 hours.
2. Blue Silica Gel (Cobalt-containing Indicator)
A color-changing indicative silica gel made by adding cobalt ch-loride (CoCl2) as an indicator to transparent silica gel. It is deep blue when dry, and gradually turns purple and then pink when fully saturated with moisture.
- Composition: Silica gel plus about 3‰-5‰ cobalt ch-loride (classified as a suspected carcinogen, restricted in use in the EU and many other regions).
- Color Change: Dry → deep blue; Moisture absorption → purple → pink (saturated).
- Applications: Scenarios requiring visual humidity monitoring such as precision instruments, meters, industrial equipment and containers.
- Regeneration: Restores to blue after drying at 120ºC and can be reused repeatedly.
3. Orange Silica Gel (Cobalt-free Environmentally Friendly Indicator)
An environmentally friendly cobalt-free color-changing silica gel using non-toxic organic dyes such as methyl violet as indicators. It is orange/orange-yellow when dry, and turns green/colorless when fully saturated with moisture.
- Composition: Silica gel plus about 0.9‰ methyl violet, non-toxic, environmentally friendly, and is a replacement for blue silica gel.
- Color Change: Dry → orange; Moisture absorption → yellowish green → green/colorless (saturated).
- Applications: Moisture-proofing scenarios with high safety and environmental protection requirements such as food, ph-armaceuticals, electronics, optical equipment and art crafts.
- Regeneration: Restores to orange after drying at 100-120ºC and can be recycled.
| Parameters() |
Transparent Silica Gel() |
Blue Silica Gel() |
Orange Silica Gel() |
| Main Component |
SiO2·nH2O (pure fine-pore silica gel) |
SiO2·nH2O + 3‰-5‰ CoCl2 |
SiO2·nH2O + 0.9‰ Methyl Violet |
| Indicator Type |
Non-indicative( |
Cobalt-containing inorganic indicator |
Cobalt-free organic indicator |
| Dry Color |
Colorless/Translucent |
Deep Blue |
Orange/Orange Yellow |
| Saturated Color |
Slightly milky white |
Pink |
Green/Colorless |
| Safety Grade |
Food-grade, non-toxic, odorless |
Toxic (suspected carcinogen), restricted use |
Food-grade, non-toxic, eco-friendly |
| Moisture Absorption Capacity |
≥30% (25ºC, RH80%) |
≥30% (25ºC, RH80%) |
≥30% (25ºC, RH80%) |
| Working Temperature |
-40ºC ~ +120ºC |
-40ºC ~ +120ºC |
-40ºC ~ +120ºC |
| Regeneration Condition |
100-120ºC, dry for 1-2h |
120ºC, dry until restored to deep blue |
100-120ºC, dry until restored to orange |
| Direct Food Contact |
Yes |
No |
Yes |
| EU RoHS Compliance( RoHS) |
Compliant |
Non-compliant |
Compliant |
| Core Application |
General moisture-proof for food, ph-armaceuticals, leather, daily chemicals |
Visual humidity monitoring for industrial equipment, precision instruments, containers |
High-standard moisture-proof for food, ph-armaceuticals, optical devices, high-end electronics |
1.Transparent Silica Gel (Non-indicative, Food-grade Safe)
- Food & ph-armaceutical industry: Moisture proofing for nuts, dried foods, pastries and other food products; sealed moisture proofing for ph-armaceuticals, health products and medical consumables (FDA-compliant, direct contact with food and ph-armaceuticals allowed).
- Daily light industry: Routine moisture proofing for leather products, clothing, shoes, hats, luggage, cosmetics and daily chemical products.
- General industry: Storage and transportation moisture proofing for hardware accessories, plastic products and ordinary electronic components (no real-time humidity monitoring required).
- Home storage: Daily moisture absorption and dehumidification for wardrobes, shoe cabinets, jewelry boxes and storage boxes.
2.Blue Silica Gel (Cobalt-containing Indicator, Industrial Visualization)
- Precision instruments & meters: Moisture proofing and humidity monitoring for optical instruments, surveying and mapping equipment, precision measuring tools and electronic meters.
- High-end industrial equipment: Internal moisture proofing for precision machine tools, electrical control cabinets, aerospace parts and marine equipment.
- Containers & long-distance transportation: Moisture proofing inside sea freight and cross-border transportation containers, with intuitive judgment of moisture damage during transportation.
- Chemical industry & laboratories: Moisture-proof storage of chemical raw materials, laboratory reagents and chromatographic columns, with real-time environmental humidity monitoring.
3.Orange Silica Gel (Cobalt-free Eco-friendly Indicator, Visualization + High Safety)
- High-end moisture proofing for food & ph-armaceuticals: Moisture proofing for infant food, health products, precious medicinal materials and medical aesthetic consumables, with visual judgment of desiccant replacement timing.
- High-end electronics & optics: Moisture proofing for the production, storage and transportation of mobile phones, cameras, lenses, Bluetooth headsets and smart wearable devices.
- Art crafts & luxury goods: Moisture-proof storage of jewelry, jade, mahogany furniture, high-end art crafts and luxury leather goods.
- Eco-friendly industrial scenarios: Moisture proofing for new energy accessories, lithium battery materials and children's toy parts (EU RoHS-compliant, meeting overseas export requirements).
- Blue silica gel replacement: All scenarios requiring visual moisture proofing, especially industrial customers with export demands and eco-friendly requirements.
Shipping and Packing
| Package Type |
Container Load Capacity |
Delivery time |
Quality
Insurance |
Payment Terms |
| 20 GP |
40 GP |
| Ton bag |
20 m3 |
40 m3 |
Within 7-14 days |
Chinese National Standard; Offer quality assurance as request. |
T/T, L/C, Paypal, West Union |
| Plastic bag |
20 m3 |
40 m3 |
| Paper box |
20 m3 |
40 m3 |
| Wooden box |
20 m3 |
40 m3 |
Pingxiang Bestn Chemical Packing Co., Ltd was established in 2007, It is a professional manufacturer and exporter that has more than 10 years experience in Chemical Packing. We are located in Hi-Tech Industrial Park, Development area, Pingxiang city, Jiangxi Province, with convenient transportation access. All of our products comply with international quality standards and are greatly appreciated in a variety of different markets throughout the world.Our main products are molecular sieve, activated alumina, ceramic ball, honeycomb ceramics, Plastic lamella clarifiers, MBBR Media, random and structured chemical packing in ceramic, plastic and metal material, can be used in all types of petrochemical chemical processes and environmental application.Our well-equipped facilities and excellent quality control throughout all stages of production enables us to guarantee total customer satisfaction. Besides, we have received ISO9001: 2008 certificate, SGS report, etc. As a result of our high quality products and outstanding customer service, we have gained a global sales network reaching seven Continents.Since its foundation, our company keeps living up to the belief of "honest selling, best quality, people-orientation and benefits to customers" We are doing everything to offer our customers with best services and best products. We promise that we will be responsible all the way to the end once our services begin.If you are interested in any of our products or would like to discuss a custom order, please feel free to contact us. We are looking forward to forming successful business relationships with you, also warmly welcome to visit our factory.
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