欧盟于1998年把氯化钴确定为二类致癌物，含有氯化钴的变色蓝胶在欧美已禁 止生产而逐步淘汰，为了适应市场需要，研制出了无钴环保变色硅胶。

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.

该产品研制与开发基于蓝色变色硅胶，以细孔硅胶经浸染无机盐混合液而制得的桔色变色硅胶，它采用新型无毒复合染色剂，从根本上消除了染色剂、变色剂对环境造成的污染。

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.

该产品主要用于干燥剂兼指示干燥剂的饱和程度及密封包装物，精密仪器仪表内空间介质的相对湿度；一般包装物和仪器仪表的防潮。可以单独做干燥剂使用，也可以与细孔硅胶配合使用。

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.