Shipping Research Peptides: Classification, Solvents and Dry Ice

A vial of lyophilised peptide travelling across Canada is, in transport terms, usually unremarkable. The cold pack it travels with sometimes is not, and that inversion — the packaging being regulated while the contents are not — is the part that catches people out.

What the transport regime actually asks

The Transportation of Dangerous Goods Act and its regulations govern goods that fall within one of nine classes: explosives, gases, flammable liquids, flammable solids, oxidising substances and organic peroxides, toxic and infectious substances, radioactive materials, corrosives, and a ninth miscellaneous class.

The question a shipper has to answer is therefore narrow. Not “is this substance unusual” or “is it valuable”, but “does it meet the criteria of one of those classes”. A substance that meets none of them is not dangerous goods, and the documentation, marking, placarding and training requirements that follow from being dangerous goods do not arise.

Why most lyophilised peptides fall outside

A dry peptide powder is not flammable in the sense the class requires, is not a gas, is not an oxidiser, is not corrosive, and is not radioactive. The classes that could plausibly apply are the toxicity classes, and classification into those requires data — the same absence described in safety data sheets for research peptides.

With no data establishing acute toxicity at the thresholds the criteria specify, there is no basis to classify into a toxicity class, and the material ships as ordinary goods. This is the same logic that puts many research peptides outside the workplace hazard regime described in hazardous product classification, and it has the same limitation: it reflects what has not been established rather than what has.

The solvent changes the answer

Dry powder and the same peptide in solution are different shipments. Once a flammable solvent is present in quantity — an alcohol, acetonitrile — the flammable liquid class comes into play and the shipment may be regulated on the strength of the solvent alone, irrespective of the peptide.

This is the same distinction that governs the disposal question in disposing of research peptides, and it runs the same way: the peptide is rarely the regulated component, and what it is dissolved in usually is.

Dry ice, which is regulated

Solid carbon dioxide is assigned to the miscellaneous class, under its own UN number, because it sublimes to a gas that displaces oxygen in an enclosed space. A shipment containing dry ice is therefore carrying a regulated substance even when the material being kept cold is not.

What follows depends on quantity and mode, and air transport is the strict case — packaging must vent, the net quantity of dry ice must be marked, and the airline’s own acceptance requirements apply on top of the regulations. Gel packs and phase-change materials avoid all of this, which is one reason most peptide shipments use them, and why the excursion risk discussed in cold chain and temperature excursions is managed with insulation rather than with a colder coolant.

Air adds a second rulebook

Domestic ground transport sits under the Canadian regulations. The moment a shipment goes by air, the international air regime applies as well, and it is generally more restrictive — smaller quantity limits, stricter packaging, and carrier-specific rules layered on top.

A shipment that is entirely unregulated by road can therefore be constrained by air, and an international shipment picks up the receiving country’s requirements too. That is one of several reasons the border changes the calculation, as set out in importing versus sourcing domestically.

Whose responsibility the classification is

The obligation to classify correctly sits with the consignor — the party offering the goods for transport — not with the carrier and not with the recipient. A carrier may refuse a shipment, but it does not assume the classification duty by accepting one.

The practical consequence for a laboratory is that this obligation arrives the moment it ships something itself: returning material, sending a sample to a contract laboratory, moving stock between sites. At that point the laboratory is the consignor, and the classification, documentation and training requirements are its own. Where the sample is going for analysis, the documentation runs alongside the identity chain described in chain of custody.

Reading a shipment you have received

An incoming parcel with no dangerous goods markings, no shipping document and no declaration is being represented as containing nothing regulated. That is ordinarily correct for a dry peptide with gel packs, and it is worth confirming against the contents on arrival as part of the receiving checks in receiving a shipment — a package that turns out to contain dry ice without the corresponding markings is a discrepancy worth raising with the sender.

As with the rest of this area, the regulations themselves are the authority. The Transportation of Dangerous Goods Regulations are published in consolidated form by the Department of Justice, and anyone whose obligations turn on a classification should work from that text or take advice rather than from a summary.