Overview
Milky white paste is a semi-solid material characterized by its smooth texture and uniform color. It is widely used across industries due to its adaptability and functional properties, such as adhesion and moisture retention. The paste can be formulated with various chemical bases, including silicone, petroleum derivatives, or natural oils, depending on the application. In B2B contexts, it is often supplied in bulk containers (e.g., drums or pails) for industrial use or smaller packaging for cosmetic/pharmaceutical purposes. Its neutral appearance makes it suitable for further customization with dyes or active ingredients.
Physical and Chemical Properties
The paste typically exhibits a density of 1.0-1.2 g/cm³ and maintains stability under standard temperatures. Its viscosity can range from thick (similar to toothpaste) to spreadable (like lotion), tailored to end-use requirements. While generally insoluble in water, certain formulations dissolve in organic solvents like ethanol or acetone. Key chemical properties include pH neutrality (6-8 for most cosmetic grades) and resistance to oxidation. Some variants may contain emulsifiers or preservatives to enhance shelf life. Thermal conductivity is low, making it useful for insulating applications in electronics or construction.
Main Applications
In cosmetics, the paste serves as a base for moisturizers, sunscreens, and makeup products, valued for its smooth application and blendability. Industrial uses include sealants for pipes or joints, where its adhesive and waterproofing properties are critical. Pharmaceutical formulations leverage it as a carrier for topical medications. The construction industry employs it for gap-filling or as a temporary protective coating. In electronics, dielectric pastes derived from similar formulations insulate circuits. Customized versions may incorporate abrasives (for polishing) or conductive particles (for specialized coatings).
Safety and Storage
While most milky white pastes are non-hazardous, prolonged skin contact should be avoided to prevent irritation. Always refer to the Material Safety Data Sheet (MSDS) for specific handling instructions, especially if the paste contains volatile organic compounds (VOCs) or allergens. Storage requires airtight containers to prevent drying or contamination. Temperature extremes should be avoided, as heat may alter viscosity, and freezing can cause separation. For large-scale storage, palletized drums in ventilated areas are recommended. Shelf life typically ranges from 12-24 months unopened.
B2B Procurement Guide
Buyers should clarify technical specifications such as viscosity (measured in centipoise), pH tolerance, and ingredient restrictions (e.g., vegan or silicone-free requirements). Sampling is advisable to test compatibility with downstream processes. Suppliers often provide formulation adjustments for bulk orders (e.g., higher purity or added stabilizers). MOQs (Minimum Order Quantities) vary; cosmetic-grade pastes may start at 100 kg, while industrial grades often require tonne-scale commitments. Logistics considerations include non-hazardous shipping certifications and pallet compatibility for automated handling.
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