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Silica gel blue

Blue semitransparent glassy substance containing an indicator. When free from moisture the beads are blue. As the beads can take up moisture, they turns light blue gradually. When they turn pink, it indicates that the ...

Silica gel white

Narrow pore white silica gel is colorless or slightly yellow transparent glassy in substance. It is mainly used as desiccants, moisture absorbents and rust inhibitors, and can protect instruments, weaponry, electronic ...

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硫化物和氧化物