The Export Shipping Document Set for Petrochemicals, Explained

A petrochemical shipment moves on paper as much as on a ship. The core set is the commercial invoice, packing list, bill of lading, certificate of origin, certificate of analysis, inspection certificate, safety data sheet and insurance certificate. Each answers a different question for a different reader: the buyer, the bank, customs, the carrier, the port, and the insurer. Most delays and rejected presentations come from documents that disagree with one another, not from documents that are missing.

This guide explains what each document does, who normally issues it, how bill of lading types differ, and where errors creep in. Exact requirements depend on the product, the route, the importing country's rules and the payment terms, so treat this as a working checklist, and confirm local requirements with your customs broker.

The document set at a glance

Some shipments need more: a dangerous goods declaration, a fumigation or phytosanitary certificate for certain packaging, import licences or permits, and for bulk vessel cargoes quantity documents such as a shore tank report or a cargo manifest. Your freight forwarder or the port agent will list what the specific route requires.

Commercial invoice

The commercial invoice is the seller's bill. Customs uses it to assess duty, the bank uses it to examine a letter of credit presentation, and the buyer uses it for payment and accounting.

A sound invoice shows:

• Seller and buyer names and full addresses, exactly as in the contract and any credit.
• Invoice number and date.
• A precise goods description, usually with grade and product name, and the HS (customs tariff) code if required.
• Quantity and unit of measure, unit price, total value and currency.
• The Incoterms rule and named place, for example "FOB Sohar, Incoterms 2020".
• Payment terms and bank details where appropriate.
• Country of origin, vessel or container details, and bill of lading number where known.

Common errors: a goods description that differs from the credit or the contract; a total that does not equal quantity multiplied by unit price; the wrong Incoterm or place; the buyer's name spelled differently from the bill of lading; and the wrong currency. Customs authorities may treat an under-stated value as a serious breach, so the invoice must reflect the real transaction.

Packing list

The packing list describes how the goods are packed. For drums, IBCs, bags or ISO tanks it states the number of packages, type, gross and net weights, marks and numbers, and the container or seal numbers. For bulk cargoes there is usually no conventional packing list; a statement of quantity and the vessel's tank or hold details takes its place.

Carriers and customs use it to match the cargo to the booking, and a buyer's warehouse uses it to check receipt.

Common errors: net and gross weights that do not match the invoice or bill of lading; package counts that differ between documents; container or seal numbers that were changed after documents were prepared; and rounding that produces visible differences. Where a quantity tolerance applies, state it on the invoice and make sure the figures stay inside it.

Bill of lading

The bill of lading (B/L) is issued by or for the carrier. It does three jobs:

1. Receipt. It confirms the carrier has received the goods, usually described by the shipper, in apparent good order and condition.
2. Evidence of the contract of carriage. It records the terms under which the goods move.
3. Document of title. If it is a negotiable ("to order") bill, whoever holds the original can demand delivery of the cargo and can transfer that right.

Because it can represent the cargo, the bill of lading is the most closely controlled document in the set. Banks treat it with particular care.

Key fields

• Shipper, consignee, notify party. Consignee "to order" or "to order of [bank]" is common under a letter of credit.
• Vessel and voyage, port of loading, port of discharge.
• Description of goods, number and type of packages, gross weight.
• "Shipped on board" date. This is the date banks and contracts usually treat as the shipment date.
• Freight status: "freight prepaid" or "freight collect", which should match the Incoterm.
• The number of originals issued, often three.
• Any remarks about the apparent condition of the goods or packaging. A bill with such remarks is "claused" or "dirty"; one without is "clean".

Types of bill of lading

Original (negotiable) bill of lading. Issued in a set, typically three originals. Presentation of one original, duly endorsed where necessary, is enough to claim the cargo, and the others then become void. That is why a buyer must control the full set, and why a bank asks for all of it. The cargo is normally released at destination only against an original.

Telex release or express release. The shipper surrenders the original bills to the carrier at the loading port. The carrier then authorises release at destination by message, without the buyer producing paper. It is fast and avoids the originals arriving after the cargo, which is common on short voyages. The consequence is that the seller gives up the leverage that the originals provide, so the usual practice is to surrender only once payment has been received or secured. Under a letter of credit, a telex-released shipment cannot produce the original set the credit demands, so the credit must allow it.

Sea waybill. A non-negotiable receipt and contract of carriage naming the consignee, who receives the cargo on proving identity. No original is needed at destination, so there is nothing to courier. It is convenient between parties who trust each other, and the seller has no title leverage. It is generally unsuitable where a bank is financing the trade on the strength of the bill, and it cannot be used where the credit demands an original negotiable bill.

Other variants buyers meet:

• Electronic bills of lading. Some carriers offer them. Acceptance depends on the carrier's platform, the parties, the banks and the law of the countries involved, so confirm before relying on one.
• House and master bills. A freight forwarder may issue its own house bill, which is not the carrier's bill. Check that a credit or contract allows a forwarder's bill.

Delivery without an original

If cargo arrives before the original bills, a buyer may ask the carrier to release against a letter of indemnity. That bears real risk and carriers do not always accept it, so do not treat it as routine.

Common errors: consignee or notify party wrong; shipped-on-board date after the latest shipment date in the credit; remarks on the face of the bill; freight status inconsistent with the Incoterm; description of goods that differs from the invoice; fewer originals presented than the credit requires; and signing or stamping by someone who is not shown as carrier or agent.

Certificate of origin

A certificate of origin states the country where the goods were wholly obtained, produced or substantially processed. Importing customs may use it to apply tariff rates, enforce trade measures, or confirm eligibility under a trade agreement. For non-preferential origin, a chamber of commerce or another authorised body usually certifies the exporter's declaration. Preferential origin under a free trade agreement follows that agreement's specific forms and rules, which may differ from a standard certificate.

What to check:

• Exporter, consignee and goods description match the invoice.
• Country of origin is stated and, if the buyer's country requires it, the transport details are right.
• The certificate has been issued, signed and stamped by the issuing body, and carries any required number or QR code.

Common errors: goods description differing from the invoice; certifying a different consignee; blank fields; wrong legalisation or no attestation where the importing country requires one; and applying for the certificate after shipment, which some bodies and importing authorities do not accept.

Certificate of analysis

The certificate of analysis (CoA) reports test results for the batch or lot against the agreed specification. It might be issued by the producer's laboratory, or by an independent laboratory.

A useful CoA identifies the product, grade, batch or lot number, date of manufacture or testing, the test method for each parameter, the specification limit and the result.

Common errors:

• Results that fall outside the specification limit in the contract or credit.
• A batch number that does not match the cargo actually loaded.
• Test methods missing or different from those in the contract.
• A CoA from the producer when the credit calls for an independent body.

Remember that a CoA reports what the issuing lab found in the sample it tested. It does not prove the same sample was taken from the cargo that was shipped, which is the reason independent inspection exists.

Inspection certificate

An inspection certificate is issued by an independent inspection company. Depending on what the contract requires, it can confirm quantity, quality, packaging, condition, marking, container loading or sealing, and the supervision of loading. Independent verification matters most where the buyer is paying before it sees the goods.

Chemineral can arrange pre-shipment inspection by SGS or Intertek. The inspector can attend loading, take representative samples, have them tested, witness sealing and issue a certificate for the file.

Useful points to agree in writing at contract stage:

• Who appoints the inspector, who pays, and which company.
• What is inspected: quantity only, quality only, or both; at which point (shore tank, ship's manifold, container stuffing).
• The test methods and specification the results are measured against.
• What counts as final: whether the independent result is binding on both parties for payment and claims.
• Retention of sealed samples, and for how long.

Common errors: the inspection company named in the credit is not the one used; quantity measured at a different point from the contract; the certificate describes the goods differently from the invoice; the certificate date is after the bill of lading date when the credit requires it earlier; and no agreed procedure for disputing results.

Safety data sheet (SDS)

The SDS, formerly called the MSDS, is the hazard communication document for a chemical product. In the format used under the Globally Harmonized System, it has sixteen sections, covering identification, hazards, composition, first aid, fire-fighting, spill response, handling and storage, exposure controls, physical and chemical properties, stability, toxicology, ecology, disposal, transport information and regulatory information.

It is normally prepared by the producer or formulator, not the trader, and must correspond to the exact product shipped. Carriers, port authorities, customs and the buyer's receiving site all rely on it.

Common errors: an SDS for a different grade or supplier; out-of-date revision; missing sections or a section 14 (transport) that does not match the booking; language or format that does not meet the importing country's requirements; and an SDS that does not match the dangerous goods classification on the shipping instruction.

Transport of hazardous cargo has its own rules. Packaged dangerous goods moving by sea are subject to the IMDG Code, which calls for a dangerous goods declaration, correct packaging and marking, and container placarding. Bulk liquid chemicals on tankers follow separate international rules for the carriage of chemicals in bulk. The booking must describe the product consistently with the SDS, or the carrier may refuse to load.

Insurance certificate

A marine cargo insurance certificate, or the policy itself, evidences that the cargo is insured. Who provides it depends on the Incoterm: the seller under CIF and CIP, usually the buyer under FOB, CFR and FCA. Where the seller must insure under CIF, the minimum is cover under Institute Cargo Clauses (C) for at least 110% of the contract price; under CIP it is Clauses (A). See the Incoterms 2020 guide.

What to check on the certificate:

• Insured party and whether the benefit can be assigned to the buyer or bank.
• Insured amount and currency.
• Clauses and risks covered.
• Voyage from loading port to destination, vessel or conveyance, and shipment date.
• Claims settling agent at destination, and where claims are payable.
• That cover starts no later than the shipment date.

Common errors: insured value under 110%; cover dated after the bill of lading; a voyage description that does not match the bill; the wrong insured party; and clauses narrower than the contract requires.

Making the set consistent

A good document set is not seven correct documents. It is seven documents that tell the same story. Build them from one master data sheet containing:

• Exact legal names and addresses of seller, buyer, consignee and notify party.
• Goods description, grade and HS code.
• Quantity, unit and package count, with gross and net weights.
• Vessel name, voyage number, containers and seal numbers.
• Ports of loading and discharge, and the planned and actual shipment dates.
• Contract number, invoice number, LC number if any, and Incoterms.

Then use this cross-check before release:

1. Names and addresses identical on the invoice, bill of lading, certificate of origin and insurance document.
2. Goods description identical, or at least consistent, across all.
3. Weights and package counts reconcile between invoice, packing list, bill of lading and inspection certificate.
4. Dates are in logical order: inspection and loading, bill of lading, insurance cover start, invoice, presentation.
5. Signatures, stamps and legalisation are present where required.

Where the payment method is a letter of credit, this check should be matched against the credit line by line; our letter of credit guide covers how banks examine documents.

Timing

Plan the document timeline backwards from the vessel cut-off or the loading window.

• Before loading: booking confirmation, shipping instructions, SDS and dangerous goods declaration, inspector appointment.
• At loading: inspection attendance, sampling, weight or quantity determination, sealing for containers.
• Immediately after loading: bill of lading draft for approval, then final issue; CoA and inspection certificate; certificate of origin.
• After sailing: invoice and packing list finalised, insurance certificate issued if applicable, set couriered or presented through the bank.

Always approve the draft bill of lading before it is released. Corrections after issue cost money and time, and the carrier may charge an amendment fee. A bill that needs amending after the credit's presentation window has started to run can mean a missed deadline.

Frequently asked questions

Which document is the most important?

For payment and delivery, the bill of lading, because it is the carrier's receipt and, if negotiable, the document of title. For customs clearance, the commercial invoice, packing list and often the certificate of origin. For safe handling, the SDS.

What is the difference between a telex release and a sea waybill?

With a telex release, a negotiable bill of lading was issued, then surrendered to the carrier, which authorises delivery by message. A sea waybill is non-negotiable from the start. Neither requires the buyer to present an original at destination, but they are different documents with different effects on a bank's examination.

Can the certificate of origin be issued after the cargo has sailed?

It depends on the issuing body and the importing country. Some will issue a certificate after shipment, often with extra requirements; others will not. Apply for it before the vessel sails.

Does an SDS need to be in a particular language?

Importing countries and receiving sites may require specific languages and formats. Ask the buyer and the port or broker at destination what is needed before shipping.

Who pays for the inspection?

It is for the parties to agree in the contract. Buyers who want independent verification often request and pay for it; sellers sometimes arrange it as part of the supply. Whichever applies, write it down, along with the named inspection company.

What if a document contains an error after the vessel has sailed?

Tell the other party and the bank immediately and correct it. For a bill of lading, the carrier must reissue or amend it. For a letter of credit, a corrected presentation or an amendment may be possible while the credit is valid. Delay narrows the options.

Speak to the trade desk

Chemineral exports from Sohar and Salalah, and our trade desk can walk through the document set for your product and destination before you commit to a shipment. Contact the trade desk with your product, quantity, port of discharge and payment method.