Zinc Pyrithione, with the CAS number 13463-41-7, is a chemical compound widely recognized for its remarkable properties. It is a white to off - white powder at room temperature. The molecular formula of Zinc Pyrithione is C10H8N2O2S2Zn, and its molecular weight is approximately 317.68 g/mol. This product is typically supplied in high - purity forms by factories, ensuring its quality and effectiveness for various applications. It has good solubility in some organic solvents, while having limited solubility in water. The melting point of Zinc Pyrithione is around 260 - 263°C, and it is stable under normal storage conditions if protected from extreme heat, moisture, and direct sunlight.
Zinc Pyrithione has a wide range of applications across different industries. In the personal care industry, it is a key ingredient in anti - dandruff shampoos. It works by inhibiting the growth of Malassezia, a type of fungus that is often associated with dandruff. By controlling the fungus, it helps to reduce flaking, itching, and irritation of the scalp. In the paint and coating industry, Zinc Pyrithione is used as an anti - microbial agent. It can prevent the growth of mold, mildew, and algae on painted surfaces, thereby extending the lifespan of the paint and maintaining the aesthetic appearance of the coated objects. Additionally, it is also used in some textile applications to impart anti - microbial properties to fabrics, making them more hygienic and resistant to odor - causing bacteria.
When using Zinc Pyrithione in anti - dandruff shampoos, the recommended concentration usually ranges from 0.5% to 2%. First, wet your hair thoroughly. Apply an appropriate amount of the shampoo containing Zinc Pyrithione to your scalp and massage gently for about 2 - 3 minutes to allow the active ingredient to work effectively. Then, rinse your hair thoroughly with water. For paint and coating applications, Zinc Pyrithione can be added during the formulation process. It should be well - dispersed in the paint matrix to ensure uniform anti - microbial protection. The typical dosage in paints is around 0.1% - 1% depending on the specific requirements of the application and the expected level of microbial resistance. In textile applications, Zinc Pyrithione can be incorporated into the fabric treatment process, either by padding, dipping, or spraying methods. The concentration of use needs to be optimized according to the fabric type and the desired anti - microbial performance.
Personal Care - Anti - Dandruff Shampoo: A well - known brand of anti - dandruff shampoo introduced Zinc Pyrithione into its formula. After a clinical trial involving 100 volunteers with mild to moderate dandruff problems, it was found that after using the shampoo for 4 weeks, 80% of the volunteers reported a significant reduction in dandruff. The itching and flaking of the scalp were also notably alleviated.
Paint and Coating - Exterior Wall Paint: A building in a humid coastal area was painted with exterior wall paint containing Zinc Pyrithione. After 2 years of exposure to the outdoor environment, there was no visible growth of mold or mildew on the painted surface. In contrast, another section of the building painted with a similar paint without Zinc Pyrithione showed significant mold growth within just 6 months.
Textile - Sports Socks: A sports sock manufacturer treated its socks with Zinc Pyrithione. During a wear - test by athletes, it was found that the treated socks had a much lower odor level compared to the untreated socks. The anti - microbial property of Zinc Pyrithione effectively inhibited the growth of odor - causing bacteria on the socks, providing a more comfortable wearing experience.
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