Are silica gels with color indicators subject to labeling?

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The color indicator is important here. According to European Union legislation, pure silica gel, molecular sieve and alumina are not classified as hazardous. Furthermore, they are non-flammable and chemically stable. No ecological problems are to be expected when handled and used properly. If these adsorbents are used in aeration dryers, a silica gel with color indicator is often selected. Especially for silica gels, various color changes are available, which indicate a change from a certain water content on. Some color indicators are classified as toxic and hazardous to health. Such color indicators make the silica gels and thus also the aeration dryers subject to mandatory labeling.


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