Introduction

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 color-indicating silica gel. In the form of spherical or irregularly-shaped grains, the color change is from Orange to Green. 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 varies as humidity changes.

Application

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

Technical Specifications

Items		Specifications
		Orange Silica Gel
		Orange to Green	Orange to White
Adsorption capacity(25℃)%	RH=20%≥	9.0	9.0
	RH=35%≥	15.0	15.0
	RH=50%≥	23.0	23.0
Qualified ratio of particle size	%≥	95	9.5
Qualified ratio of spherical particle	%≥	90	90
Loss on heating	%≤	2.0	2.0
Color Changing	RH=20%	Yellow	Yellow
	RH=35%	Green Yellow	Light Yellow
	RH=50%	Green	White