There are many kinds of desiccants, which are very common in our daily life and easy to contact, and its role is mainly to prevent moisture and prevent the growth of various molds. But, do you know color-changing silica gel desiccant?
First of all, color-changing silica gel desiccant is still a highly active adsorption material, the main principle is sodium silicate and sulfuric acid reaction, high adsorption performance, good thermal stability, chemical stability, high mechanical strength of silica gel desiccant.
Secondly, the color-changing silica gel desiccant is roughly divided into two types, one is blue silica gel desiccant, the other is orange silica gel desiccant, now, simply distinguish between two silica gel desiccant and their harm to people:
1. Blue silica gel desiccant, the product is a highly fine pore structure. Blue, translucent, after moisture absorption, its color changes from blue to light red, can be mixed with general fine-pore spherical silica gel as an indicator. The main color component is “cobalt chloride” .For sensitive people, inhaling dust can cause symptoms such as obstructive pulmonary disease, shortness of breath, etc.
2. Orange silica gel desiccant, also known as “cobalt-free color-changing silica gel”, is an environmentally friendly desiccant, the main color-changing material component is methyl violet, orange before hygroscopicity, green after hygroscopicity. It has a greater impact on human health and development, belongs to the medium toxic category, long-term contact, may cause headache, nausea and vomiting and some common chronic diseases.
The above is the relevant content of the discoloration desiccant, pay attention to ensure their own safety during use, and do a good job of protective measures.
