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Propylene glycol CAS#57-55-6
High Purity and Quality: Industrial-grade 1,2-propanediol has a purity of ≥99.5%, ensuring reliable performance for industrial and laboratory applications.
Excellent Solubility: Fully miscible with water and most organic solvents, allowing versatile use in various formulations and chemical processes.
Wide Thermal Range and Stability: With a melting point of −59°C and a boiling point of 187°C, 1,2-propanediol is thermally stable and suitable for applications across a broad temperature range.
Safe and Chemically Stable: The compound is chemically stable under normal conditions, though it is incompatible with strong oxidizing agents, making it safe for typical industrial use.
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product description
Product Description of Propylene glycol CAS#57-55-6
1,2-Propanediol (Propylene Glycol, CAS 57-55-6) is industrial grade with purity ≥99.5%. It is a colorless viscous liquid, almost tasteless with a faint sweet odor.
It has a melting point of −59°C, a boiling point of 187°C, a vapor pressure of 0.011 kPa at 20°C, and a relative density of 1.036 at 20°C.
It is miscible with water in all ratios and compatible with most organic solvents. It remains stable under normal conditions and should be stored away from strong oxidizing agents.
Product Application of Propylene glycol CAS#57-55-6
Propylene glycol has similar uses to other glycol products. It serves as a major raw material for manufacturing unsaturated polyester, epoxy resin and polyurethane resin, which consumes around 45% of its total output. Unsaturated polyester is commonly applied in reinforced plastics and surface coatings.
Thanks to its good viscosity, moisture retention and non-toxicity, propylene glycol is also widely used in food, pharmaceutical and cosmetic fields as a humectant, antifreeze, lubricant and solvent.
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FAQ
Q：
Are you a manufacturer or a trader?
A：
We are a supply chain service provider rather than a single manufacturer. Instead of being tied to one specific factory, we have established deep partnerships with numerous high-quality domestic chemical enterprises that hold certifications such as ISO and REACH. This allows us to flexibly match the most suitable supply sources to your needs while independently conducting third-party quality inspections to ensure delivery quality and price competitiveness.
Q：
How do your overseas warehouses operate, and what are the practical benefits?
A：
We maintain transit warehouses with standing inventory in Southeast Asia, the Middle East, and Eastern Europe.
For you: You can pick up goods directly from local warehouses without the need for full-container orders; delivery times are reduced from the standard 30–45 days to just 3–5 days.
Reduced inventory pressure: You can purchase small batches for trial and quality verification before scaling up orders, avoiding the need to tie up large amounts of capital upfront.
Emergency restocking: If your production line faces a sudden material shortage, we can urgently dispatch supplies from our regional warehouses to prevent production downtime.
For you: You can pick up goods directly from local warehouses without the need for full-container orders; delivery times are reduced from the standard 30–45 days to just 3–5 days.
Reduced inventory pressure: You can purchase small batches for trial and quality verification before scaling up orders, avoiding the need to tie up large amounts of capital upfront.
Emergency restocking: If your production line faces a sudden material shortage, we can urgently dispatch supplies from our regional warehouses to prevent production downtime.
Q：
What is the Minimum Order Quantity (MOQ)?
A：
For standard products, the MOQ is typically one 20-foot container (approx. 16–20 tons) for direct shipments from China. However, for stock picked up from overseas warehouses, we support orders starting from 1 ton—ideal for sample testing or small-batch production. Specific MOQs depend on the product category and packaging type; please contact us for details.
Q：
How do you ensure product quality?
A：
We implement a "three-level quality control" system:
Before leaving the factory: We require the factory to provide a Certificate of Analysis (COA) for the specific batch.
Before shipment: We commission international third-party agencies like SGS or Intertek to conduct random inspections, with costs covered by us (for long-term partners).
After arrival: If quality issues arise, we commit to unconditional negotiation regarding returns, exchanges, or compensation, and we assume full responsibility. All terms are stipulated in the contract.
Before leaving the factory: We require the factory to provide a Certificate of Analysis (COA) for the specific batch.
Before shipment: We commission international third-party agencies like SGS or Intertek to conduct random inspections, with costs covered by us (for long-term partners).
After arrival: If quality issues arise, we commit to unconditional negotiation regarding returns, exchanges, or compensation, and we assume full responsibility. All terms are stipulated in the contract.
Q：
What payment methods do you accept? Do you offer credit terms?
A：
We accept T/T (Telegraphic Transfer), L/C (Letter of Credit at sight or usance), and D/P (Documents against Payment). For clients with a long-standing partnership and good credit standing, we offer partial credit terms (e.g., 30–60 days), subject to negotiation based on transaction history and due diligence results. Cash on Delivery (COD) is available for local customers ordering in-stock items from our overseas warehouses.
Q：
What is the typical delivery lead time?
A：
FOB (China Port): Goods are prepared and shipped within 7–15 working days after the contract is signed and the prepayment is received.
Overseas Warehouse Stock: Items are dispatched within 1–3 working days of order confirmation and payment; local delivery typically takes 2–5 days (depending on the country).
Overseas Warehouse Stock: Items are dispatched within 1–3 working days of order confirmation and payment; local delivery typically takes 2–5 days (depending on the country).
Q：
Which trade terms do you offer? Do you support DDP (Delivered Duty Paid)?
A：
We are proficient in handling common terms such as FOB, CIF, CFR, and EXW. Additionally, for regions covered by our overseas warehouses, we offer DDP services (including duties and door-to-door delivery), allowing you to receive goods without the hassle of complex import customs clearance procedures. Please consult your sales manager for specific costs.
Q：
How can I obtain samples? What are the costs?
A：
If stock is available at an overseas warehouse, we can provide 1–2 kg of samples for free; you only need to cover the local courier fees.
If shipping from China, we can arrange delivery via DHL or FedEx; samples are free, but you bear the international shipping costs. Once a clear intent to cooperate is established, these shipping costs can be deducted from your first order.
If shipping from China, we can arrange delivery via DHL or FedEx; samples are free, but you bear the international shipping costs. Once a clear intent to cooperate is established, these shipping costs can be deducted from your first order.
Q：
Can the contract price be adjusted if product prices fluctuate?
A：
We offer a price protection mechanism:
For fixed-price contracts, we do not unilaterally raise prices due to market increases.
If you anticipate a market downturn, we can negotiate floating pricing—settling based on a benchmark price on the date of shipment or arrival—to flexibly manage fluctuations.
For fixed-price contracts, we do not unilaterally raise prices due to market increases.
If you anticipate a market downturn, we can negotiate floating pricing—settling based on a benchmark price on the date of shipment or arrival—to flexibly manage fluctuations.
Q：
What does your after-sales service include?
A：
We provide full-lifecycle service:
Usage Guidance: Assistance with adjusting processing parameters (if required).
Complaint Handling: Response within 48 hours and a solution provided within 7 days.
Regular follow-ups: Proactive contact every six months to understand changing needs and optimize supply solutions.
Usage Guidance: Assistance with adjusting processing parameters (if required).
Complaint Handling: Response within 48 hours and a solution provided within 7 days.
Regular follow-ups: Proactive contact every six months to understand changing needs and optimize supply solutions.
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To view the current overseas warehouse inventory list or obtain a tailored logistics solution, please contact us via the form on our official website or by email.