Is black masterbatch a dangerous good? Shipping classification explained
Short answer: no, in the ordinary case — and the reason it is worth explaining properly is that the wrong answer costs money in both directions. Declaring masterbatch as dangerous goods pays a DG surcharge, complicates the booking and can add days. Failing to declare something that is regulated is a far worse outcome.
So this is the classification as it actually stands, what your paperwork should say, and the three UN numbers that keep getting attached to the word carbon.
Start with carbon black, not with masterbatch
Carbon black — CAS 1333-86-4, the pigment that does the work in a black masterbatch — is not subject to the UN Model Regulations on the Transport of Dangerous Goods. It carries no UN number, no hazard class and no packing group. That position is consistent across the regimes a shipment actually travels under:
- Road, rail, inland waterway — ADR, RID and ADN: not subject.
- Sea — IMDG: Special Provision 925 sets out the exemption for carbon black of mineral origin (petroleum and gas feedstocks), which is what commercial carbon black is.
- Air — ICAO Technical Instructions and IATA DGR: not subject.
- National regimes — US DOT, Canadian TDG, Australian ADG and others take the same line for non-activated carbon of mineral origin.
The wording matters: the exemption applies to carbon, non-activated, mineral origin. It is not a blanket exemption for anything with the word carbon in it. That distinction is where most of the confusion downstream comes from.
Masterbatch is one step further from the question
Black masterbatch is carbon black already dispersed into a polymer carrier — PE, PP, PS, ABS or a wax system — and supplied as pellets in 25 kg bags or big bags. Two consequences:
- The carbon black is bound inside a polymer matrix. The dust behaviour of loose carbon black powder, which is the only genuinely hazardous property in the raw material, does not describe the pellet.
- The carrier is an ordinary thermoplastic, itself not a dangerous good.
So a standard PE- or PP-carrier black masterbatch is, in the normal case, a general cargo. When a customer asks us and the answer is "not a dangerous good", that is the basis for the answer — not a habit of answering no.
The three UN numbers that get mistaken for it
This is the part worth reading twice, because it is where shipments get mis-declared in both directions.
| UN number | Proper shipping name | What it actually is |
|---|---|---|
| UN 1361 | CARBON, animal or vegetable origin | Charcoal-type carbon from organic feedstock — not carbon black |
| UN 1362 | CARBON, activated | Activated carbon with a large internal surface area — a different product with different behaviour |
| UN 3088 | Self-heating solid, organic, n.o.s. | A self-heating class. Carbon black of mineral origin is not self-heating, which is precisely why the IMDG exemption exists |
None of these three is carbon black, and none of them is black masterbatch. If a forwarder, a broker or an internal compliance template reaches for one of these because the word carbon appears on the invoice, that is a conversation to have before the booking is confirmed. It is much easier to correct a classification than to unwind a mis-declaration at the port of discharge.
Combustible dust is a different question
A safety data sheet for carbon black will usually carry a combustible dust classification — US SARA 311/312, Canadian WHMIS and similar. That is a workplace safety classification for airborne powder, and it answers a different question from the transport regulations.
It is worth separating the two plainly:
- Transport classification asks: is this cargo regulated while it is being moved? For carbon black of mineral origin — no.
- Dust classification asks: is airborne powder a hazard inside a plant? For loose carbon black powder — yes, and it is managed with extraction, housekeeping and ignition control.
A masterbatch pellet is not airborne powder, so the dust classification does not make the shipment a dangerous good. Conversely, "not a dangerous good" is not a statement that no handling controls are ever needed where loose powder is handled.
What should travel with the container
For a standard black masterbatch shipment, the documentation set is straightforward:
| Document | What it does at the border |
|---|---|
| Commercial invoice & packing list | Value, quantity, weights — the base set |
| Bill of lading / waybill | Contract of carriage |
| Certificate of origin | Duty treatment, and required by some destinations outright |
| Technical data sheet (TDS) | Grade specification — carbon content, carrier, MFR, ash |
| Batch certificate of analysis (CoA) | What this lot measured, not what the grade nominally is |
| Safety data sheet (SDS) | The transport classification a carrier will actually read |
| Non-DG declaration | Shipper's statement that the goods are not subject to transport regulations — normal practice, and it speeds up booking |
| REACH / RoHS statement | Where the destination or the buyer's own compliance system asks for it |
The SDS is the document that settles the question. If a supplier cannot produce one that states the transport position explicitly, the classification has not actually been established — it has only been assumed. The full import document checklist is here.
When the answer would be different
To be complete, there are cases where the classification changes — and they are not cases involving standard pellet masterbatch:
- Liquid colour or solvent-borne systems. A product supplied in a flammable or otherwise classified vehicle carries that classification. Masterbatch pellets do not.
- Classified additives. If a formulation includes an additive that is itself a dangerous good above the relevant concentration threshold, the mixture has to be assessed on its own SDS. This is a formulation question, and it is answered per product.
- Non-transport restrictions that get mistaken for DG rules. The REACH restriction on carbon black in tattoo inks, and California Proposition 65's listing of airborne respirable carbon black particles, are real obligations — but neither is a transport classification and neither makes a container of pellets a dangerous good.
If your application uses a non-standard formulation, the right question is not "is masterbatch a dangerous good" but "what does the SDS for this specific product say". Those are different questions and only the second one has a usable answer.
What we provide
Every grade we ship leaves with an SDS stating the transport position, and a batch CoA reporting what the lot measured. If your forwarder needs a non-DG declaration or the SDS in a particular format, tell us at booking stage and we prepare it with the shipping documents rather than after a query at the port.
Our grades are carbon black compounded on PE, PP, PS, ABS or wax carriers — see the full grade chart for the carriers and loadings available.
Frequently asked
Is black masterbatch classified as dangerous goods?
No, in the ordinary case. Carbon black of mineral origin is not subject to the UN Model Regulations and carries no UN number; IMDG Special Provision 925 sets out the sea-freight exemption. Black masterbatch is that carbon black compounded into a polymer carrier and supplied as pellets, so it sits further from any DG classification than the raw material does. The classification you ship under is the one on the product's own SDS.
Which UN numbers get confused with carbon black?
UN 1361 (CARBON, animal or vegetable origin), UN 1362 (CARBON, activated) and UN 3088 (Self-heating solid, organic, n.o.s.). None of them is carbon black, and none is black masterbatch.
Does the combustible dust classification make it DGR?
No. Combustible dust is a workplace safety classification for airborne powder, not a transport classification. Pellets are not airborne powder.
What paperwork should be on the container?
Invoice, packing list, B/L, certificate of origin, TDS, batch CoA, SDS — plus a non-DG declaration where the SDS supports it, and REACH/RoHS statements if the destination or buyer asks.
When could a masterbatch actually be regulated?
When something other than carbon black and carrier puts it there — a flammable vehicle, or a classified additive above threshold. Those products are assessed on their own SDS. Non-transport rules such as the REACH tattoo-ink restriction or California Prop 65 do not affect the transport classification.
Questions buyers ask
Does combustible dust make black masterbatch dangerous goods?
No. Combustible dust is a workplace safety classification, not a transport classification. It applies to airborne carbon black powder, which is a hazard inside a plant handling loose powder. Masterbatch is supplied as pellets and is not a dust hazard in normal handling. The two classifications answer different questions and should not be substituted for one another.
What documents should a black masterbatch shipment carry for customs?
Commercial invoice, packing list, bill of lading, certificate of origin, the technical data sheet, a batch certificate of analysis, and the safety data sheet. Where the SDS shows the product is not subject to transport regulations, a non-dangerous goods declaration from the shipper is normal practice and speeds up booking. Some destinations also ask for a REACH or RoHS statement, and food-contact grades carry their own declaration.
When could a black masterbatch actually be regulated?
When something other than the carbon black and the carrier puts it there - a solvent-borne liquid colour, an additive that is itself classified, or a formulation supplied in a flammable vehicle. Those are different products and their own SDS governs. There are also non-transport restrictions that get mistaken for dangerous goods rules, such as the REACH restriction on carbon black in tattoo inks, or California Proposition 65 listing airborne respirable carbon black particles. Neither affects the transport classification of masterbatch pellets.
Related pages
- Import documents for a black masterbatch shipment — the full checklist
- REACH & RoHS for black masterbatch exports — the compliance side, distinct from transport
- How to read a black masterbatch CoA — what a lot report should actually state
- All 12 black masterbatch grades — carriers, loadings and data sheets