Here is an uncomfortable truth about chemical logistics in 2026: the biggest quality risk to your shipment is no longer the product. It is the journey.
When an Asia-to-Europe routing goes via the Cape of Good Hope instead of Suez, you add roughly two weeks each way. When a Gulf-bound parcel needs transshipment because carriers have pulled direct calls, you add another handling event. When a container sits on a quayside in October at 38°C ambient waiting for a slot, the inside of that box is considerably hotter. None of that changes the specification on the certificate of analysis. All of it changes what arrives.
This is the checklist we run internally on every glycol shipment, written out so you can run the same checks on your supplier.
The SDS is the document customs, carriers and your EHS team all read first. Getting it right avoids delays that no freight rate can compensate for.
First, the Classification Question
Buyers frequently assume that because something is called a "chemical" it must be dangerous goods. For DEG and PEG, that is usually not the case — but you still need the paperwork to prove it.
Parameter | Diethylene glycol (DEG) | Polyethylene glycol (PEG) |
|---|---|---|
CAS number | 111-46-6 | 25322-68-3 |
Appearance | Colourless viscous liquid | Liquid (low MW) to waxy solid (high MW) |
Flash point | 143 °C closed cup | ~246 °C (PEG 600) to ~270 °C (high MW) |
IMDG flammable liquid (Class 3)? | No — flash point well above 60 °C | No |
UN number | None assigned for transport | None assigned for transport |
GHS hazard classification | Not classified as hazardous for supply in most schemes; acute oral toxicity is the concern if ingested | Low acute toxicity; not GHS-classified as hazardous |
Other hazards to manage | Hygroscopic; combustible at high temperature | Powder grades can form combustible dust-air mixtures; thermal decomposition releases carbon oxides |
Because the flash point sits above the 60 °C threshold, neither product is a Class 3 flammable liquid under the IMDG Code, and neither carries a UN number. In practice they ship as ordinary chemical cargo.
But "not dangerous goods" is a conclusion, not a document. Chinese ports and most destination authorities will expect:
A current safety data sheet in GHS format, matching the batch and the declared CAS number.
A transport condition appraisal — in China this is the Identification and Classification Report for Transport of Goods — issued by an accredited testing body, confirming non-dangerous status.
A non-dangerous cargo declaration from the shipper where the carrier or terminal asks for one.
Do not rely on a supplier's verbal assurance or a foreign manufacturer's "non-haz" letter. Carriers and terminals in China work from the appraisal report, and if it is missing the booking gets rolled. In a market where the next sailing may be a week away and the surcharge has changed, a rolled booking is expensive.
Why Grade Confusion Is the Real Safety Risk
The most serious incident in the history of glycol trade was not a fire or a spill. It was a substitution.
In 2006 and 2007, diethylene glycol was fraudulently sold as glycerin and used in pharmaceutical syrups in several countries, resulting in hundreds of deaths, many of them children. DEG and glycerin look alike, have similar viscosity, and were priced far apart — which is precisely why the substitution was profitable. The aftermath reshaped pharmaceutical excipient regulation worldwide: the FDA introduced stricter glycerin testing requirements, the WHO issued guidance on preventing counterfeit and substandard medicines, and pharmacopoeial monographs tightened.
That history is the reason we treat grade documentation as a safety issue rather than a commercial nicety. Three rules follow from it:
Industrial-grade DEG never enters a food, pharmaceutical or cosmetic supply chain. DEG is listed as a prohibited component under China's cosmetic safety technical rules, and it is not an approved pharmaceutical excipient or food additive in most jurisdictions.
PEG grades are not fungible across regulated uses. Pharmaceutical-grade PEG must meet the relevant monograph — the Chinese Pharmacopoeia 2025 edition Volume IV covers grades 400, 600, 4000 and 6000, with USP and European Pharmacopoeia equivalents for export markets. Food-grade product follows GB 1886.302-2021. Residual ethylene oxide and 1,4-dioxane limits are what separate these grades from industrial product, and they are not visible on a standard industrial CoA.
The CAS number on the CoA, the SDS, the drum label and the customs declaration must all agree. A mismatch is the single fastest way to get a consignment held, and in a regulated supply chain it is a reportable event.
An SDS That Survives Customs Scrutiny
Sixteen sections, current GHS revision, and in the language of the destination market. The sections that actually get read by officials and by your customer's EHS team:
Section 1 — Identification. Product name, CAS number, supplier details and an emergency telephone number that someone answers. A dead phone number here has caused more shipment holds than any other single defect we have seen.
Section 2 — Hazards identification. GHS classification, signal word, hazard and precautionary statements. If the product is not classified, say so explicitly rather than leaving the section sparse.
Section 7 — Handling and storage. Temperature limits, segregation from oxidisers and strong acids, moisture control. This is the section that tells your warehouse team what to do.
Section 9 — Physical and chemical properties. Flash point, boiling point, density, solubility, vapour pressure. These numbers are what the transport classification rests on.
Section 14 — Transport information. State clearly: not classified as dangerous goods, no UN number, not regulated under IMDG, IATA or ADR. Ambiguity here invites inspection.
Section 15 — Regulatory information. Destination-market registrations. For the EU that means REACH status; for other markets, local inventory listings.
One practical point: the SDS revision date should be recent and should correspond to the product actually being shipped. Carriers and terminals increasingly check dates, and a 2019 SDS on a 2026 shipment raises questions nobody has time to answer.
Packaging Integrity Over a 45-Day Voyage
DEG is hygroscopic. PEG solids cake in heat. Both are shipped in packaging that was designed for a 30-day transit, not a 45-day one. Here is what we specify.
Drums
New steel or HDPE drums, 230 kg net, with intact bungs and gaskets. Reconditioned drums are acceptable for some industrial destinations but must be declared and are frequently rejected for pharma-adjacent supply chains.
Bung seals and a recorded seal number per drum, photographed before loading.
Pallets shrink-wrapped and banded, with corner protection. Drums that shift in a container abrade their labels, and an unreadable label is an inspection trigger.
Wooden pallets heat-treated and stamped to ISPM 15. This is checked at destination, not at origin.
IBCs
Check the UN marking and the manufacture date. Composite IBCs have a service life, and an out-of-date unit will be refused by the terminal.
Confirm the destination accepts IBCs for your grade. Some food and pharmaceutical supply chains do not.
ISO tanks
Prior-cargo restriction is the critical clause. The previous three cargoes must be disclosed and must be compatible. A tank that carried a strong odour compound, a dark resin or a food-incompatible chemical will taint your glycol regardless of how well it is washed.
Require a cleaning certificate naming the cleaning station, plus a wash-water residue test where the application is sensitive.
For PEG solutions and hygroscopic glycols, ask about nitrogen blanketing on long transits. It is inexpensive relative to a colour claim.
Verify the tank's periodic test date is current.
Bags (PEG flakes, pastilles, powder)
25 kg multi-wall bags with an inner moisture barrier, or PE-lined woven bags. Plain paper bags will not survive a humid 45-day voyage.
Desiccant in the container, and a container lining or kraft paper floor cover where the box has been washed and not fully dried.
Powder grades: dust control at filling, and check whether the destination requires combustible-dust handling documentation.
Storage conditions before loading matter as much as the voyage itself. Heat and humidity drive colour and moisture — the two specification lines that generate claims.
Moisture and Impurity: The Two Numbers That Cause Claims
In our experience, the overwhelming majority of glycol quality disputes come down to two lines on the CoA:
Parameter | Typical limit | How it drifts | Control |
|---|---|---|---|
Water content (DEG) | ≤ 0.10% | Open drums, humid warehouse, unwashed or damp ISO tank, long transit | Seal immediately after sampling; nitrogen blanket; desiccant in container |
Water content (PEG liquids) | ≤ 0.20% typical | Same mechanisms; PEG is strongly hygroscopic | Same controls, plus minimise headspace in drums |
Colour, APHA (DEG) | ≤ 10 premium, ≤ 20 standard | Oxidation from heat and air; contamination from a dirty tank or drum | Store below 30 °C; prior-cargo check; avoid prolonged quayside dwell |
MEG impurity (DEG) | ≤ 0.10% | Process variation at the plant, not transit | Batch-specific CoA; know which plant produced the lot |
TEG impurity (DEG) | ≤ 0.10% | Process variation at the plant | Same |
Residual EO / 1,4-dioxane (pharma PEG) | Per pharmacopoeia monograph | Not a transit issue — a grade-selection issue | Buy the right grade with the right monograph documentation |
The pattern to watch: a batch leaves the plant within specification, sits in a hot container yard for eleven days waiting for a rolled booking, and arrives with colour at APHA 25 and water at 0.14%. Nobody did anything wrong. The journey did. That is why we now build dwell time into the specification we agree with customers on exposed lanes, rather than promising a plant-gate number that cannot survive the routing.
Inspection and the Documentation Stack
For any consignment above a few tonnes, or any consignment into a regulated supply chain, we recommend third-party pre-shipment inspection. SGS, Bureau Veritas and Intertek all operate at the Chinese ports and production sites we ship from.
The inspection should cover, at minimum:
Sampling from the actual lot being loaded, not from a retained reference sample.
Verification of assay, water content, colour, MEG and TEG against the agreed specification.
Package condition, marking, label legibility and pallet integrity.
Container or tank condition — cleanliness, dryness, absence of odour, structural integrity, and for ISO tanks the prior-cargo record.
Seal numbers recorded and photographed at the moment of sealing.
Loading supervision and a final count against the packing list.
The cost is small relative to the value of the cargo and trivial relative to a rejected container. If a supplier refuses third-party inspection, treat that as your answer.
Cargo Insurance in a War-Risk Market
This section has changed more than any other in the past eighteen months, and most exporters have not updated their thinking.
The arithmetic is straightforward. Insured value is conventionally CIF value plus 10%, so:
Insurance premium = CIF value × 1.10 × rate
Rates for ordinary chemical cargo under Institute Cargo Clauses (A) — the "all risks" equivalent — typically run 0.1% to 0.3% of insured value. On a USD 20,000 consignment that is USD 22 to USD 66. Negligible.
The complication is war. Standard Institute Cargo Clauses exclude loss or damage caused by war, civil war, revolution, rebellion, insurrection, and the use of any weapon of war. That exclusion is bought back through a separate Institute War Clauses (Cargo) policy, and the premium for that cover is set by the same underwriting market that has pushed hull war-risk rates from 0.25% of vessel value before the conflict to roughly 5% today, with peaks near 10%.
Three practical consequences:
War-risk cargo cover on Gulf transits is priced per voyage and can be withdrawn at short notice. Underwriters operate a seven-day or even shorter cancellation window on some war risks. A policy quoted on Monday may not be available on the sailing date.
Strike and war exclusions are separate. Confirm you have both if your routing passes through an affected area.
On CIF terms the seller arranges insurance, and the default is minimum cover. If you are buying CIF into a Gulf or Red Sea-adjacent port, specify in the contract that war-risk cargo cover is included and name the clauses. Otherwise you may discover at claim stage that the peril which actually affected your cargo was excluded.
We also recommend delay-related cover be discussed explicitly. Standard cargo policies do not compensate for market loss caused by late arrival, and in a market where a two-week routing change can move a glycol price by several hundred yuan per tonne, delay is a real economic exposure.
Pre-Booking Checklist
Print this. It takes ten minutes and it prevents most of the problems described above.
CoA for the specific batch, dated, with assay, water, colour, MEG and TEG.
SDS in GHS format, current revision date, destination-language version available.
Transport condition appraisal report confirming non-dangerous status.
CAS number consistent across CoA, SDS, label and draft customs declaration.
Grade confirmed against end use — industrial, food (GB 1886.302-2021) or pharmacopoeial.
Packaging specification agreed: drum type and condition, IBC UN marking and date, or ISO tank prior-cargo restriction and cleaning certificate.
Pallets ISPM 15 stamped where wooden.
Container or tank inspection booked, with cleanliness and dryness confirmed before loading.
Desiccant and container lining specified for long or humid transits.
Third-party pre-shipment inspection arranged where value or end use justifies it.
Seal numbers recorded and photographed.
Cargo insurance confirmed, with war and strike cover explicitly addressed for affected routes.
Price validity and surcharge pass-through agreed in writing before booking.
How JBSR Handles This
Every glycol shipment we arrange goes out with a batch-specific CoA, a current GHS safety data sheet and the transport condition appraisal report. We book third-party inspection on request, photograph seals at loading, and we will tell you honestly when a routing carries a quality risk that a lower freight rate does not justify.
Our export services page sets out the documentation and logistics process in full. If you have a specification you need matched, or a shipment that arrived out of spec and you want a second opinion on why, get in touch — that conversation is often more useful than a price list.
Regulatory requirements vary by jurisdiction and change frequently. This article reflects our operating practice as of October 2026 and is provided for general guidance. Confirm current requirements with your customs broker, carrier and regulatory adviser for your specific shipment and destination.