blue silica gel

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Post Date: Aug 27, 2008
Validity Date: Sep 10, 2008
Category: Chemicals » Desiccant & Sorbent

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Description

Characteristies

Including blue gel indicator, chromotropic silica gel and blue silica gel. Turning from blue to red after absorbing moistures. The shape is glass-like pellets or lumps and the color is blue or light blue.

Use

Mainly used for absorbing moisture, anti-rusting of instruments, gauges and equipment in the enclosed conditions. After absorbing moisture, it turns from blue to red, visually indicating the relative humidity of the given environments. When being used with ordinary silica gel or drier, it indicates to which extent the drier absorbs the moisture and judges the relative humidity of a given environment, It is widely used as silica gel drier for the packing of precision instruments, leathers, shoes, clothes, foodstuffs, medicine and household electric appliances, etc.

Technical Data

ITEM		Blue gel indicator	Discoloring silica gel	Blue silica gel	Typical values
Adsorption capacity, %	RH=20 % ≥	8.0	----	----	8.5
	RH=35 % ≥	13.0	----	----	13.6
	RH=50 % ≥	20.0	20.0	18.0	22.5
	RH=90 % ≥	----	----	28.0	31.4
Rattler loss, % ≤		10.0	10.0	10.0	0.5
Qualified size ratio, % ≥		96	90	90	97
Loss on heating, % ≤		5.0	5.0	5.0	0.9
Colour	RH=20 %	Blue or light blue	----	----
	RH=35 %	Purple or purplish red	----	----
	RH=90 %	Light red	Light red light	Purple or light red