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歐盟于1998年把氯化鈷確定為二類致癌物，含有氯化鈷的變色藍膠在歐美已禁 止生產而逐步淘汰，為了適應市場需要，研制出了無鈷環保變色硅膠。該產品研制與開發基于藍色變色硅膠，以細孔硅膠經浸染無機鹽混合液而制得的桔色變色硅膠，它采用新型無毒復合染色劑，從根本上消除了染色劑、變色劑對環境造成的污染。

In 1998, the European Union identified cobalt chloride as a class II carcinogen, blue gum containing cobalt chloride has been banned in Europe and the United States and phased out, in order to meet the needs of the market, the development of cobalt-free environmental color-changing silica gel.

The research and development of the product is based on blue rubber color-changing silica gel, which is made of orange color-changing silica gel by dyeing the inorganic salt mixture. It adopts a new non-toxic compound dyeing agent, which fundamentally eliminates the pollution caused by dyeing agent and color-changing agent to the environment. The product has become a new generation of environmental protection products with its original technological conditions and good adsorption properties.

該產品主要用于干燥劑兼指示干燥劑的飽和程度及密封包裝物，精密儀器儀表內空間介質的相對濕度；一般包裝物和儀器儀表的防潮�？梢詥为氉龈稍飫┦褂�，也可以與細孔硅膠配合使用。

The product is mainly used for desiccant and indication desiccant saturation degree and sealing packaging, precision instruments in the space medium relative humidity; Moisture-proof of general packaging and instruments. Can be used as a desiccant alone, can also be used in combination with narrow pore silica gel.