Silica gel is a granular, porous form of silicon dioxide made synthetically from sodium silicate. It’s a naturally occurring mineral that is processed in a granular form or into beads. As a desiccant, it removes water vapor by ADSORPTION onto its surface rather than ABSORBTION into its structure.

Most silica gels come in a paper packet, ready to be applied to packaging structures to avoid degradation of goods by controlling humidity. Use of silica gel became widespread during World War I, with gas mask canisters utilizing silica gels to adsorb various vapors.

Indicating silica gels are joined with a moisture indicator that changes color when the gel goes from anhydrous (dry) to hydrated and saturated (wet). Common indicators used with silica gels are cobalt chloride and methyl violet.  Cobalt chloride is the most popular, changing from deep blue to when dry to pink when wet. Methyl violet is considered safer but is relatively new, changing from orange to green, or orange to colorless.

Silica gel is generally recognized as safe when use with food products, and can be renewed by heating it to 250 degrees Fahrenheit for 1 to 2 hours.

Part Number Description Shop
40ISG01 0.25 Gram Indicating Silica Gel Desiccant Packet; 30,000/case Contact for Pricing
40ISG03 0.5 Gram Indicating Silica Gel Desiccant Packet; 20,000/case BUY
40ISG33 0.5 Gram Indicating Silica Gel Desiccant Packet; 2,000/case BUY
40ISG05 0.75 Gram Indicating Silica Gel Desiccant Packet; 15,000/case Contact for Pricing
40ISG07 1.0 Gram Indicating Silica Gel Desiccant Packet; 10,000/case  BUY
40ISG09 1.5 Gram Indicating Silica Gel Desiccant Packet;  9,000/case Contact for Pricing
40ISG11 2.0 Gram Indicating Silica Gel Desiccant Packet;    6,000/case BUY
40ISG13 3.5 Gram Indicating Silica Gel Desiccant Packet;  4,000/case Contact for Pricing
40ISG15 5.0 Gram Indicating Silica Gel Desiccant Packet;  3,000/case BUY
40ISG17 7.0 Gram Indicating Silica Gel Desiccant Packet; 2,000/case BUY
40ISG19 10.0 Gram Indicating Silica Gel Desiccant Packet; 1,800/case BUY
40ISG23 14.0 Gram Indicating Silica Gel Desiccant Packet; 1,200/case BUY
40OISG53ZB 14.0 Gram Orange Indicating Silica Gel Desiccant Packet; 100/bag BUY
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0.5 Gram Indicating Silica Gel Desiccant Packet; (20,000/case) - 40ISG03
0.5 gram Indicating Silica Gel Desiccant Packet; 2 tins containing 10,000/each; 20,000/case ..
$328.15
1.0 Gram Indicating Silica Gel Desiccant Packet; (1,000 Pieces) - 40ISG37
1.0 gram Indicating Silica Gel Desiccant Packet; 1,000 pieces packaged in a MylarFoil bag w/ Zipp..
$72.50
1.0 Gram Indicating Silica Gel Desiccant Packet; (10,000/case) - 40ISG07
1.0 gram Indicating Silica Gel Desiccant Packet; 2 tins containing 5,000/each; 10,000/case &nb..
$285.89
2.0 Gram Indicating Silica Gel Desiccant Packet; (6,000/case) - 40ISG11
2.0 gram Indicating Silica Gel Desiccant Packet; 2 tins containing 3,000/each; 6,000/case &nbs..
$253.57
5.0 Gram Indicating Silica Gel Desiccant Packet; (3,000/case) - 40ISG15
5.0 gram Indicating Silica Gel Desiccant Packet; 2 tins containing 1,500/each; 3,000/case &nbs..
$280.42
5.0 Gram Indicating Silica Gel Desiccant Packet; (300/bag) - 40ISG45
5.0 gram Indicating Silica Gel Desiccant Packet; 300 pieces packaged in a MylarFoil bag w/ Zipper..
$72.50
7.0 Gram Indicating Silica Gel Desiccant Packet; (2,200/case) - 40ISG17
7.0 gram Indicating Silica Gel Desiccant Packet; 2 tins containing 1,100/each; 2,200/case &nbs..
$246.11
7.0 Gram Indicating Silica Gel Desiccant Packet; (220/bag) - 40ISG47
7.0 gram Indicating Silica Gel Desiccant Packet; 220 pieces packaged in a MylarFoil bag w/ Zipper..
$72.50
10.0 Gram Indicating Silica Gel Desiccant Packet; (1,800/case) - 40ISG19
10.0 gram Indicating Silica Gel Desiccant Packet; 2 tins containing 900/each; 1,800/case  ..
$285.14
10.0 Gram Indicating Silica Gel Desiccant Packet; (180/bag) - 40ISG49
10.0 gram Indicating Silica Gel Desiccant Packet; 180 pieces packaged in a MylarFoil bag w/ Zippe..
$72.50
14.0 Gram Indicating Silica Gel Desiccant Packet; (1,200/case) - 40ISG23
14.0 gram Indicating Silica Gel Desiccant Packet; 2 tins containing 600/each; 1,200/case  ..
$251.78
14.0 Gram Indicating Silica Gel Desiccant Packet; (120/bag) - 40ISG53
14.0 gram Indicating Silica Gel Desiccant Packet; 120 pieces packaged in a MylarFoil bag w/ Zippe..
$72.50
14.0 Gram Orange Indicating Silica Gel Desiccant Packet; (100/bag) - 40OISG53ZB
14.0 gram Orange Indicating Silica Gel Desiccant Packet; 100 pieces per MylarFoil barrier bag with Z..
$72.50
0.5 gram Indicating Silica Gel Desiccant Packet; 2,000/Bag - 40ISG33
About: 0.5 gram Indicating Silica Gel Desiccant Packet; 2 tins containing 2,000 packets packaged ..
$72.50