Buyer-facing sourcing profile for propylene glycol, CAS 57-55-6, offered as China-origin industrial grade material with stated purity options of 99.5% and 99.9%. Suitable RFQs should confirm grade, concentration, batch COA values, moisture, acidity/alkalinity, color, packaging, export documents, and destination compliance requirements. For excipient or regulated end-use enquiries, buyers should request specific pharmacopeia or food-grade documentation before considering suitability.
Quick buying facts
Identify the grade, package, and import market before comparing suppliers.
Use this page to check the product identity, common specification points, document scope, package notes, and destination-market questions before sending a China sourcing request.
CAS No.: 57-55-6Propylene glycol / 1,2-propanediol / 1,2-dihydroxypropane, CAS 57-55-6Needs grade and documentation verification before RFQ acceptance
Stated purity options: 99.5% and 99.9%; extracted inspection table also shows 99.00% min result 99.0%, so grade and active specification must be reconfirmed before order
Moisture: source inspection example states 0.2% max, result 0.06%
Specific gravity at 20°C: source inspection example states 1.035–1.038, result 1.037
Refractive index at 20°C: source inspection example states 1.428–1.435, result 1.433
Alkalinity as OH: source inspection example states 0.04 mmol/100 g max, result 0.01 mmol/100 g
Color: source inspection example states APHA 5 max
Acidity: source inspection example includes result 0.0046; unit/spec wording should be clarified on current COA
Who uses this page
Target buyers
Industrial chemical importers
Resin and coatings raw material buyers
Solvent and intermediate distributors
Cosmetics or personal-care raw material buyers requiring separate grade verification
Food or excipient buyers only if supplier can provide appropriate regulated-grade documentation
India-based chemical distributors performing CAS and documentation checks
Before matching
Documents to check
CAS number, grade, assay, and impurity profile
SDS, COA, TDS, HS code, and transport classification
Destination-market import documents before supplier matching
Package and route
Packing notes
Available packing stated on source page: 215 kg drum, 1000 kg IBC drum, flexitank, and ISO tank
Confirm drum material, lining, palletization, seal type, net weight, and tare weight before shipment
For container loads, request loading plan by packing type and destination port requirements
Ask whether packing is new, export-worthy, and suitable for long-distance ocean freight
Request photos of current stock packing, labels, batch numbers, and pallet marks before dispatch
Applications and sourcing options
Check whether this product fits the buyer's actual application.
Clear application, grade, package, and document notes help separate real sourcing demand from a vague price check.
Use context
Common applications
Industrial solvent and humectant applications subject to buyer validation
Raw material for unsaturated polyester resin and related industrial formulations
Coatings, plastics, surfactant, and polyurethane-related supply chains
Distribution stock for buyers needing CAS 57-55-6 propylene glycol with verified grade and COA
Excipient or regulated applications only after confirmation of applicable pharmacopeia or food-grade compliance documents
How we compare
Sourcing options
Request quote for 215 kg drum packing for trial or smaller commercial lots
Request quote for 1000 kg IBC packing for distributor stock
Request flexitank or ISO tank quotation for bulk import programs
Request separate offers for 99.5%, 99.9%, industrial grade, and any available pharma/food/excipient grade
Request third-party inspection, pre-shipment sample, and sealed retention sample for batch verification
Human review
Compliance notes
Source page identifies the material as industrial grade; do not assume pharmaceutical, food, cosmetic, or excipient suitability without matching documentation
For India excipient enquiries, request pharmacopeia compliance documents if required, such as IP/USP/EP/BP alignment, GMP-related statements, residual impurity profile, and approved COA format
Request current SDS, COA, TDS/specification sheet, packing list, invoice, certificate of origin, and any applicable export documentation before purchase
Confirm DG classification, UN number status if any, flash point basis, and carrier acceptance with the supplier and freight forwarder before booking
Do not rely on marketplace category text for compliance classification; verify CAS, grade, purity, and intended-use documentation directly from the supplier
If buyer requires food, pharma, or excipient grade, ask supplier to clearly separate industrial-grade inventory from regulated-grade inventory and provide traceable batch documentation
Import compliance, registration, labeling, and end-use acceptance must be checked by the buyer for the destination market
Buyer search paths
Related sourcing terms
These terms support long-tail discovery while keeping the page focused on useful product and China export buying context.
Share target market, quantity, packaging scope, artwork status, delivery destination, and required documents so CHN Chemicals can prepare a cleaner supplier comparison.
Questions to confirm
Is the offered batch industrial grade, food grade, pharma grade, or excipient grade? Please state exact grade on COA and invoice.
Can you provide a current batch COA matching CAS 57-55-6 and the quoted purity, 99.5% or 99.9%?
Why does the extracted inspection report show 99.00% min and result 99.0% while the title states 99.5% / 99.9%? Please confirm the actual guaranteed specification.
What are the current batch values for purity, moisture, color APHA, acidity, alkalinity, specific gravity, refractive index, and key impurities?
Can you provide SDS, TDS, COA, certificate of origin, packing list, and export invoice before shipment?
For India-bound excipient enquiries, can you provide USP/EP/IP/BP compliance evidence, GMP-related documentation, and impurity statements if applicable?
What packing options are available for the required order size: 215 kg drums, IBC, flexitank, or ISO tank?
What is the MOQ for commercial orders and for pre-shipment samples?
Checks before quote
Source page identifies the material as industrial grade; do not assume pharmaceutical, food, cosmetic, or excipient suitability without matching documentation
For India excipient enquiries, request pharmacopeia compliance documents if required, such as IP/USP/EP/BP alignment, GMP-related statements, residual impurity profile, and approved COA format
Request current SDS, COA, TDS/specification sheet, packing list, invoice, certificate of origin, and any applicable export documentation before purchase
Confirm DG classification, UN number status if any, flash point basis, and carrier acceptance with the supplier and freight forwarder before booking
Do not rely on marketplace category text for compliance classification; verify CAS, grade, purity, and intended-use documentation directly from the supplier
If buyer requires food, pharma, or excipient grade, ask supplier to clearly separate industrial-grade inventory from regulated-grade inventory and provide traceable batch documentation
Import compliance, registration, labeling, and end-use acceptance must be checked by the buyer for the destination market
Next step
Send the product page with your target quantity and market. A sourcing manager can then confirm sample options, supplier fit, packaging details, and open document gaps.
