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Color-Variable Silica Gel



The European Union decided in 1998 that cobalt chloride is a carcinogen and blue silica gel containing cobalt chloride was thus prohibited and disappeared from European and American markets. To meet the needs of the market, our company developed the color-variable silica gel, including Non-cobalt Blue Silica Gel and Orange Silica Gel.


Characteristics

In the form of spherical or irregularly-shaped granules, the gel is currently presented either blue or orange. With silicon dioxide as the chief ingredient, the product performs all the functions of blue silica gel but does not contain cobalt chloride and is therefore innocuous and pollution-free, and its color changes along with relative humidity.



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description

Use


Mainly for drying and indicating humidity of precision instruments, medicine, petrol chemicals, foodstuff, clothing, leather, electric appliances, other industrial gases, etc.



How to use


Put some color-variable silica gel into a suitable container or package and set the container or package where drying or humidity indication is needed. This gel can be used independently or in combination with other types of silica gel. After changing color as a result of absorbing moisture, the gel can be reused after heating to change into its original color. Heating temperature should be at 100-120.



Technical Data

ITEM

Specifications

Non-cobalt Blue Silica Gel

Orange Silica Gel

Adsorption capacity,%

RH=20%,

9.0

9.0

RH=50%,

22.0

22.0

rattle rate,%,

10.0

10.0

Qualified size ratio,%,

90.0

90.0

Loss on heating,%,

5.0

5.0

Color

RH=50%

red

light blackish-green / white

Original color

blue

orange