Hydrochloric acid (HCl, CAS 7647-01-0, UN 1789) is transported as aqueous hydrogen chloride with industrial concentrations of 28–37 wt%, corresponding to densities of approximately 1.14–1.19 g/cm³ at 20 °C. Fuming grades above 37 wt% and anhydrous hydrogen chloride under UN 1050 create separate classification and packaging liabilities. The distinction between an HCl exporter and an HCl manufacturer is not a distinction between a non-hazardous and hazardous party; it is a distinction between the party that legally performs classification, packaging, and loading functions and the party that commercially concludes the export sale. 49 CFR § 171.8 defines person who offers or offeror to include any person who performs, or causes to be performed, any pre-transportation function required under 49 CFR subchapter C. ADR 1.2.1 defines consignor as the enterprise by which the goods are consigned. The same physical drum of 33 wt% hydrochloric acid may therefore have one legal manufacturer for SDS and classification purposes and a different legal consignor for transport if the sales contract transfers loading and carrier nomination before the material is tendered.

Under Incoterms 2020, the operational boundary is fixed by the named place and point. At EXW, the manufacturer is not obliged to load the collecting vehicle; delivery occurs when the packaged acid is placed at the disposal of the buyer at the works. The buyer-appointed exporter or freight forwarder then becomes the party issuing the carriage instruction and, if it signs the multimodal dangerous goods form, usually becomes the shipper under 49 CFR § 172.204 or the consignor under ADR 5.4.1. At FCA, the seller must load the collecting vehicle if the named place is the seller’s premises; loading occurs before carrier receipt, so the seller or manufacturer may be the offeror for any damage caused by improper blocking or bracing. Under CIF, the seller/exporter contracts carriage and may therefore appear as shipper on the bill of lading, although the manufacturer remains responsible for the cargo’s classification and packaging if it supplied the packaged article.

Published dangerous goods enforcement data indicate a recurring problem: the party that pays freight is named as shipper in the carrier’s system without performing any packaging or loading operation. In such cases, a carrier may pursue the named exporter for undeclared residue or gasket attack, while the exporter returns a claim to the manufacturer under the supply contract. The legal outcome depends on a three-part test of who selected the packaging, who loaded the freight container or tank, and who signed the transport document. A manufacturer that pre-loads a 20-ft ISO tank container and affixes the UN 1789 placard but does not sign the dangerous goods declaration may still be an offeror if it caused the tank to be offered with an open top valve or an overfilled condition. Conversely, an exporter that sub-contracts loading to a third-party terminal under FCA may assume carrier-facing liability as the party that arranged the loading even though it never operated the pump.

When Does an Exporter Become the Dangerous Goods Shipper Under 49 CFR § 171.8?

The trigger is the performance of a pre-transportation function. 49 CFR § 171.8 includes in the definition any person who loads a hazardous material into a cargo tank, transport vehicle, or bulk packaging; any person who certifies that the material has been prepared in accordance with the Hazardous Materials Regulations; and any person who selects packaging. An exporter that does not load or package but merely arranges ocean carriage and customs brokerage is not automatically the shipper in the U.S. hazardous materials sense. However, the same exporter may be considered the commercial shipper in the ocean carrier’s bill of lading and may incur liability under the U.S. Carriage of Goods by Sea Act, 46 U.S.C. § 30701, as cargo interests. The two roles should not be conflated because the defenses under 49 CFR Part 107 are different from the cargo claim defenses under COGSA.

This allocation does not transfer all statutory liability. PHMSA and ADR enforcement authorities issue penalties against the person who performed the violating act, not merely the person named on the invoice. If an FCA seller loads a 20-ft ISO tank in accordance with ISO 1496-3 but the buyer-nominated carrier is involved in a rollover after the tank is accepted, the seller’s loading function has ended, and cargo loss risk under FCA has passed to the buyer once the goods are delivered to the carrier. Liability for a latent packaging defect remains with the party that selected the packaging.

Bulk ISO tank container shipment of hydrochloric acid is governed by filling limits under ADR 4.3.2.2 and 49 CFR § 173.24b that prevent hydraulic overpressure. The maximum degree of filling for a liquid hazardous material in a tank is determined by the liquid’s coefficient of expansion and the transport temperature. For a 33 wt% HCl solution with density 1.16 g/cm³ at 20 °C, common terminal practice is to leave 5–7% outage by volume under moderate climatic conditions. Overloading is a persistent field failure; terminal operators report that a 1.0 °C rise in average cargo temperature expands the liquid more than the initial vapor space calculation assumed when the tank is filled to 97% by volume. The party that performs the filling is the party accountable for this nonconformity, regardless of whether that party is the manufacturer or an export terminal acting on behalf of the exporter.

Bulk Tank Container Loading Assigns Liability Before Carrier Acceptance

ISO tank containers for hydrochloric acid are typically lined or constructed with materials capable of resisting chloride pitting. The use of 316L stainless steel or rubber-lined carbon steel depends on temperature and iron contamination limits. Exposed stainless steel can suffer pitting when the acid contains oxidizing contaminants such as ferric chloride; this is why food-grade or pharmaceutical-grade HCl usually moves in rubber-lined or high-purity PTFE-lined equipment. The loading operation involves a fill line connected to the tank’s bottom valve, a vapor return line to the storage tank scrubber, and a pressure/vacuum relief device set to the tank’s maximum allowable working pressure, commonly 4 bar for ISO tanks. If the vapor return line is not used, the tank may pressurize above the relief setting during 35 °C ambient transfer, and the relief device may discharge acidic vapor. In that situation, the terminal active during loading has created the hazardous event, not the commercial exporter that sits remote.

Under ADR 5.4.3, the dangerous goods transport document for carriage in bulk must contain the UN number, proper shipping name, class, packing group, and the quantity and type of packaging. The fill operator that certifies the document confirms that the tank container has been inspected and is roadworthy. In the European Union, the tank container may also require periodic inspection under ADR 6.8.2.4, with test and inspection reports retained. A manufacturer that supplies bulk HCl under its own dangerous goods declaration retains this inspection documentation; an exporter that purchases bulk acid and arranges carriage but has no access to the tank container’s inspection history may be accepting a documentation risk. Published data for the exact distribution of carrier claims between producer and trader is limited, but terminal inspection records consistently identify loading violations—overfill, incorrect gasket material, or missing vapor return—as the primary claims source.

Exporter De Minimis Obligations and REACH Article 6 Downstream User Status

REACH does not govern carriage liability but controls registration. Under Article 3(9) of Regulation (EC) No 1907/2006, a manufacturer is any natural or legal person established in the European Union who produces a substance. A non-EU producer exporting hydrochloric acid to an EU importer is not a REACH registrant. The EU importer is the registrant under Article 6 unless an only representative is appointed under Article 8. The exporter may be the non-EU producer, the EU importer, or an intermediary; only the EU-established manufacturer or importer carries registration duties. This compliance structure does not change the transport consignor status. An EU trader buying from a non-EU manufacturer and reselling to a member state customer may be the importer for REACH, but it is not automatically the consignor if the material moves directly from the non-EU facility and the customer arranges import.

The manufacturer or formulator is responsible for the Safety Data Sheet under REACH Article 31 and for classification under CLP Regulation (EC) No 1272/2008. The transporter uses the SDS as an information source but the SDS is not the dangerous goods document. Hydrochloric acid at ≥25 wt% is classified as Skin Corr. 1B under CLP; at 10–25 wt% it may be Skin Irrit. 2, and below 10 wt% the skin corrosion and severe eye damage classifications may no longer apply while Eye Irrit. 2 may remain. An exporter that translates or reissues an SDS without checking the concentration may incorrectly assign transport hazard information. When a blended product contains HCl plus corrosion inhibitors, the SDS and dangerous goods declaration must align on proper shipping name; a “Hydrochloric acid solution” shipment containing 20 wt% HCl and a proprietary inhibitor may still meet PG II or PG III depending on the transport regulation’s mixture criteria, and the manufacturer’s classification data are the original basis.

The table does not override the general verification duty. A shipper must classify a formulation according to the actual corrosivity data and the provisions of the applicable modal code; the packing group is not simply read from a concentration range. For hydrochloric acid below 10 wt%, the material may still be corrosive to steel or aluminum under test conditions, and the consignor may be penalized for failing to apply a hazardous material description. This verification is typically performed by the manufacturer or a competent testing laboratory, while the exporter’s obligation is to retain and forward the data.

If the Manufacturer Loads a Tank Container Under FCA, Who Bears Cargo Loss?

This scenario is the most contested in HCl export logistics because the loading operation and delivery point are adjacent in time. Under FCA, the seller delivers when it loads the goods on the buyer’s nominated carrier at the seller’s premises. The act of loading is therefore part of the seller’s delivery obligation, but the risk of loss or damage transfers to the buyer once loading is complete and the carrier accepts the goods. A carrier’s master bill may describe the acid as “shipper loaded, stowed and counted,” meaning the carrier relies on the dangerous goods declaration and does not verify internal tank condition. If the tank’s butterfly valve leaks after departure, the loss falls initially on the cargo insurer, but the cause—loose valve closure during loading—may create recourse against the loading operator. If the manufacturer owns the loading arm and the operator, the manufacturer may bear recourse despite the risk-transfer rule. If a third-party export terminal loads under a terminal service agreement, the exporter may be the party with contractual recourse against the terminal, but the manufacturer may still be joined if the outlet valve specification was restrictive.

Packaged HCl shipped as limited quantities under 49 CFR § 173.154 allows inner packagings of 1.0 L for PG II and 5.0 L for PG III in strong outer packaging not exceeding 30 kg gross mass. The use of a limited quantity may reduce carrier obligations but does not remove the need for classification. A manufacturer that sells repacked 500 mL bottles to an exporter must verify the outer package marking and the UN 1789 identification. An exporter that recloses or relabels pallets without retaining the manufacturer’s closure instructions may create a new offer under the dangerous goods definition.

Marine cargo policies for HCl shipments distinguish between the party responsible for packing and preparation and the party that holds title. Institute Cargo Clauses (A) cover all risks except exclusions in Clause 4; insufficient packing is a standard exclusion. Thus, if a drum stack collapses because the manufacturer used three-high stacking on a four-high certified pallet without corner posts, the cargo insurer may reject the claim under the packing exclusion. The exporter buying CIF may still have paid the premium, but the insurer’s subrogation right runs against the party whose negligent packing caused the loss. Published data for this specific configuration is limited, but the structure of the packing exclusion is consistent in marine insurance.

In non-EU exporting jurisdictions, the export permit and customs declaration may identify the exporter of record as the party that holds the export authorization. This party may have no role in transport classification. U.S. Foreign Trade Regulations, 15 CFR Part 30, require the U.S. principal party in interest to file Electronic Export Information; for a domestic manufacturer selling ex works to an overseas buyer, the U.S. manufacturer may be the principal party in interest because it receives the primary benefit from the transaction. For an exporter purchasing from a manufacturer for resale, the exporter is the principal party in interest. The customs exporter of record and the dangerous goods shipper are therefore independent determinations under different legal instruments, and the HCl Exporter vs Manufacturer: Who Ships and Who Is Liable inquiry resolves into separate documentary checks rather than a single status test.