Glycol cosmetic dpg oil

Dipropylene Glycol (DPG) is a high-purity liquid used primarily as a fragrance carrier, solvent, and humectant. In the cosmetic industry, it is the gold standard for perfumes and reed diffusers because it binds fragrance oils to alcohol bases without altering the scent profile. It also acts as a viscosity decreasing agent in skin care products like lotions and sunscreens, ensuring a smooth application.

Buyers must ensure the product is Cosmetic Grade (purity ≥99.5%) rather than industrial grade. Key parameters include low odor levels, a colorless appearance (APHA <10), and a specific gravity between 1.020 and 1.025. For high-end formulations, request a Gas Chromatography (GC) report to verify the isomer distribution and ensure the absence of heavy metal contaminants.

The product must comply with REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals) for the EU market and TSCA (Toxic Substances Control Act) for the US. Additionally, ensure the supplier provides a Material Safety Data Sheet (MSDS) and a Certificate of Analysis (COA) for every batch. For natural-focused brands, check if the DPG is synthetic or derived from renewable sources, though synthetic is the industry standard for stability.

While both are humectants, DPG has a higher boiling point and lower volatility, making it superior for long-lasting fragrances. DPG is also less irritating to the skin at higher concentrations compared to PG. For B2B buyers, DPG is the preferred choice for premium fragrance oils due to its excellent co-solvency with both water and oil-based ingredients.

The most significant risk is grade substitution, where industrial-grade DPG (containing higher impurities) is sold as cosmetic-grade. This can lead to skin irritation or scent degradation in final products. To mitigate this, use Made-in-China.com's Secured Trading services and insist on third-party pre-shipment inspections (like SGS or Intertek) to verify purity levels before the balance payment is released.

DPG pricing is sensitive to raw material (propylene oxide) fluctuations. Negotiate for tiered pricing based on volume; for example, purchasing in 215kg drums vs. 1000kg IBC tanks can yield a 5-10% price difference. For long-term contracts, request a price formula linked to market indices to ensure transparency during market volatility.

DPG is generally classified as non-hazardous for transport, which simplifies logistics. However, it is hygroscopic (absorbs moisture from air). Ensure the supplier uses sealed, UV-protected HDPE drums or epoxy-lined steel drums. During shipping, specify that containers should be stored away from direct heat sources to prevent oxidation, which can cause the oil to develop a yellowish tint.

Always verify the supplier's Business License and Export Permits on Made-in-China.com. Prioritize Audited Suppliers who have undergone on-site factory inspections. Use Escrow-based payment terms where funds are only released upon confirmation of the Bill of Lading (B/L) and matching COA documents to prevent financial loss.