I. Product description
Product name: Zinc Pyrithione 48% Aqueous Dispersion
CAS No.：13463-41-7
Molecular formula：C10H8N2O2S2Zn
Molecular weight：317.7
II.Quality specifications
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Items
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Standard
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Appearance
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Off white to white dispersion
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Zinc pyrithione (%)
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48-50
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Zinc（%）
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9.3-11.3
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pH(5%)
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6.5-8.5
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Particle size（BT－9300H）：
≤1 μm（%）
≤5 μm（%）
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90
100
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Bacteria（cfu）
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<100
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III. General properties and applications
1.Is a mixture in water of very fine particles of zinc pyrithione, a dispersant, and a viscosity control agent.
2.Is an effective antidandruff agent.
3.Is the growth of a broad spectrum of both Gram positive and Gram negative bacteria.
4.Inhibits the growth of fungi, both yeast and mold.
5.Inhibits the growth of algae.
IV. Chemical incompatibility
1.Transchelation occurs in the presence of heavy metal ions. Even
traces of the corresponding chelates can cause a noticeable
discoloration, foremost the iron and copper complexes.
2.Is sensitive to strong oxidizing and reducing agents.
3.The Conductivity of water should be less than 5μs/cm Calculate
the dosage to ensure that whole barrels of product would be added for
each batch. It is recommended to add a little zinc salt to the water to
ovoid occurring Fe(III) complexes when the conductivity of the water is
less than 20μs/cm.
4. Is incompatible with EDTA, which, however, does no harm the sterilizing effect of Zinc pyrithione
V. Stability
1.Remains stable for 120 hours at 100℃, decomposes at 240℃。
2.Is sensitive to light and remains stable in pigmented coatings.
3.Is hydrolytically stable between pH 4.5 and 9.5. Below pH 4.5
conversion to pyrithione occurs. In alkaline solutions (pH > 9.5)
conversion to soluble alkali salts occurs.
VI.Precautions
1.Stores in original container in a dry and cool area away from
direct sunlight with temperature between 10℃ and 54℃. Keep container
tightly closed and sealed until ready for use. Containers opened
must be carefully resealed and kept upright to prevent leakage.
2.Agitate the barrels every 6 weeks. Pre-agitate for at least 10 minutes before using.
3.May be pre-dispersed by a certain amount of water to assure better dispersion.
4.Calculate the dosage to ensure that whole barrels of product would be added for each batch.
VII. Dosage
Rinse-off products: 0.3-2%; (measured by active ingredients)
Non-Rinse-off products: 0.1-0.25%; (measured by active ingredients)
VIII.Package
Plastic drum, 25kg/barrel.
