Overview
White mineral oil is a highly refined petroleum product obtained through extensive hydrotreatment and distillation processes. Unlike crude oils, it undergoes rigorous purification to remove aromatic compounds, sulfur, and nitrogen content, resulting in a chemically inert and stable hydrocarbon mixture. Industrial white oil is classified by viscosity (e.g., 5#, 7#, 10#, 15#) and purity grades (technical, food-grade, pharmaceutical). Its colorless and odorless characteristics make it suitable for sensitive applications where contamination must be avoided.
Physical and Chemical Properties
The oil exhibits excellent thermal stability with a flash point typically above 200°C, making it suitable for high-temperature industrial processes. Its low pour point (-15°C to -30°C) ensures fluidity in cold environments. Chemically inert, white oil resists oxidation and does not react with most metals or plastics. The viscosity index (VI) ranges from 80-120, providing consistent lubrication across temperature variations. UV transparency and dielectric properties are additional advantages for specialized uses.
Main Applications
In plastics manufacturing, white oil serves as an internal lubricant for PVC processing and a mold release agent. The textile industry uses it to lubricate high-speed spinning machinery without staining fabrics. Food-grade variants are FDA-approved for applications like bakery equipment lubrication and food packaging adhesives. Pharmaceutical grades appear in ointment bases and tablet coatings. Other uses include transformer oil extenders, cosmetic emollients, and rust preventive compounds.
Safety and Storage
While classified as non-hazardous, proper handling includes using gloves to prevent skin dehydration and eye protection against splashes. Spills create slippery surfaces requiring immediate absorption with inert materials. Storage tanks should be nitrogen-blanketed to prevent moisture absorption and oxidation. Bulk shipments require stainless steel or epoxy-lined carbon steel containers to maintain purity. Shelf life exceeds 2 years when stored below 30°C in sealed containers.
B2B Procurement Guide
Buyers should specify technical parameters including kinematic viscosity (measured at 40°C), aromatic content (<0.1% for high-grade oils), and acid value (<0.05 mg KOH/g). Food and pharmaceutical applications demand certificates like NSF H1 or USP/EP compliance. Major producers include Shell (Ondina), ExxonMobil (Marcol), and Sinopec. Spot purchases typically require 20-ton minimums, while contract pricing often follows crude oil market trends with quarterly adjustments. Testing for color (Saybolt +30 min) and aniline point ensures quality consistency.
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