UN3082 environmentally hazardous substance, liquid table entry.

Where UN3082 sits in the table

UN3082 is the liquid twin of UN3077. Both are Class 9, packing group III, label 9, symbol G, stowage category A and ERG Guide 171 (Substances (Low to Moderate Hazard)). The difference is the physical state and, with it, the packaging columns: UN3082 uses 203 for non-bulk and 241 for bulk, IB3 for intermediate bulk containers, and portable tank codes T4 and TP1 and TP29, where UN3077 uses 213, 240, IB8, IP3, T1 and TP33.

Because the G symbol is present, 172.101(b)(4) requires one or more technical names of the hazardous material in parentheses after the basic description. Class 9 under 173.140 includes any material that meets the 171.8 definition of an elevated temperature material, a hazardous substance, a hazardous waste, or a marine pollutant.

The full row from the eCFR copy of the table, current through October 29, 2026 and read November 2, 2026, is below. Every value is copied from 49 CFR 172.101; the last column is the regulation's own explanation of the column.

The 172.101 row, column by column

How the regulation defines the hazard class

173.140 says, abridged: "miscellaneous hazardous material (Class 9) means a material which presents a hazard during transportation but which does not meet the definition of any other hazard class. This class includes any material which has an anesthetic, noxious or other similar property which could cause extreme annoyance or discomfort to a flight crew member so as to prevent the correct performance of assigned duties, and any material that meets the definition in 171.8 for an elevated temperature material, a hazardous substance, a hazardous waste, or a marine pollutant."

Special provisions on this entry, in the rule's words

Column 7 does not explain itself; each code is defined in 172.102. These are the definitions as printed in the eCFR text for the codes listed on the row. Where a provision ends with a list of conditions that this page does not reproduce, it says so.

• 8: A hazardous substance that is not a hazardous waste may be shipped under the shipping description "Other regulated substances, liquid or solid, n.o.s.", as appropriate. In addition, for solid materials, special provision B54 applies.
• 146: This description may be used for a material that poses a hazard to the environment but does not meet the definition for a hazardous waste or a hazardous substance, as defined in § 171.8 of this subchapter, or any hazard class, as defined in part 173 of this subchapter, if it is designated as environmentally hazardous by another Competent Authority. This provision may be used for both domestic and international shipments.
• 173: For adhesives, printing inks, printing ink-related materials, paints, paint-related materials, and resin solutions which are assigned to UN3082, and do not meet the definition of another hazard class, metal or plastic packaging for substances of packing groups II and III in quantities of 5 L (1.3 gallons) or less per packaging are not required to meet the UN performance package testing when transported (the listed conditions continue in the rule).
• 335: Mixtures of solids that are not subject to this subchapter and environmentally hazardous liquids or solids may be classified as "Environmentally hazardous substances, solid, n.o.s," UN3077 and may be transported under this entry, provided there is no free liquid visible at the time the material is loaded or at the time the packaging or transport unit is closed. Each transport unit must be leakproof when used as bulk packaging.
• 441: For marine pollutants transported under "UN3077, Environmentally hazardous substance, solid, n.o.s." or "UN3082, Environmentally hazardous substance, liquid, n.o.s." and for purposes of shipping paper and package marking requirements, the technical name used in association with the basic description may be a proper shipping name listed in the § 172.101 Hazardous Material Table; provided that the name chosen is not also an entry that includes "n.o.s." as a part of the name or one that has a "G" in column (1) of the table.
• IB3: Authorized IBCs: Metal (31A, 31B and 31N); Rigid plastics (31H1 and 31H2); Composite (31HZ1 and 31HA2, 31HB2, 31HN2, 31HD2 and 31HH2).

T4, TP1, TP29 are portable tank instructions or provisions, defined in 172.102(c)(7) and (c)(8). They are on the row but are not reproduced on this page.

What else to know about this entry

Special provision 173 is unique to this entry. It says that for adhesives, printing inks, printing ink-related materials, paints, paint-related materials, and resin solutions assigned to UN3082 that do not meet the definition of another hazard class, metal or plastic packaging for substances of packing groups II and III in quantities of 5 L (1.3 gallons) or less per packaging are not required to meet the UN performance package testing when transported under conditions the rule then lists. The conditions are not reproduced here.

Special provisions 8, 146, 335 and 441 are shared with UN3077. 8 allows a hazardous substance that is not a hazardous waste to be shipped as "Other regulated substances, liquid or solid, n.o.s." 146 allows the description for a material designated environmentally hazardous by another Competent Authority, for domestic and international shipments. 441 lets the technical name for marine pollutants be a table proper shipping name that is neither an n.o.s. entry nor a G entry.

The ERG 2024 index lists three names under UN3082: Environmentally hazardous substance, liquid, n.o.s., Hazardous waste, liquid, n.o.s., and Other regulated substances, liquid, n.o.s., all with Guide 171.

Air quantity limits and a worked example

Columns 9A and 9B give the largest net quantity allowed in one package: column 9A for passenger-carrying aircraft or passenger-carrying rail car, column 9B for cargo aircraft only. 172.101(j) says "Forbidden" means the material may not be offered for transportation or transported in the applicable mode, and that the limit is net unless stated otherwise. For UN3082 the row shows No limit in column 9A and No limit in column 9B.

Both columns say "No limit" for this row, so entering 400 L net in one package returns "no limit" for passenger aircraft or rail car and for cargo aircraft only. That describes the table only: the special provisions above, including any IBC limits, still apply. The calculator above applies the same comparison to the quantity you type.

Highway placard check

Class 9 is on Table 2 of 172.504(e) as CLASS 9 (see 172.504(f)(9)). 172.504(f)(9) says "a CLASS 9 placard is not required for domestic transportation, including that portion of international transportation, defined in 171.8 of this subchapter, which occurs within the United States. However, a bulk packaging must be marked with the appropriate identification number on a CLASS 9 placard, an orange panel, or a white square-on-point display configuration as required by subpart D of this part."

Vessel stowage and the ERG guide

Column 10A gives category A (the material may be stowed "on deck" or "under deck" on a cargo vessel or on a passenger vessel). Column 10B is blank. These apply to shipments by vessel and have no effect on a truck-only move.

The Emergency Response Guidebook 2024 numerical index lists UN3082 under Guide 171, titled "Substances (Low to Moderate Hazard)". 172.101 itself does not list ERG guide numbers; the guide number comes from the PHMSA guidebook. The guide is for first responders during the initial phase of an incident and is not a shipping-paper or compliance document.

What this page does not do

It reproduces the table row and the regulation text it points to, and applies the air-limit and 1,001 pound placard comparisons to numbers you enter. It does not classify a product, pick a packing group, decide which table row applies to your shipment, or replace the packaging sections the row points to (the 173 sections in columns 8A to 8C), the marking, labelling and shipping paper rules in part 172, or hazmat training. Hazardous materials employees must be trained; that decision and the shipping description belong to a trained person. The eCFR header for 172.101 links an amendment published at 91 FR 49310 (August 4, 2026); confirm that the version you rely on includes the latest changes. In an emergency call 911 and the emergency response telephone number on the shipping paper.

Sources

Sources opened and read November 2, 2026. Regulation text was read from the eCFR API, which publishes the current Code of Federal Regulations.

• 49 CFR 172.101, Hazardous Materials Table (eCFR text current through October 29, 2026; read November 2, 2026)
• 49 CFR 172.102, Special provisions (read November 2, 2026)
• 49 CFR 172.504, General placarding requirements (read November 2, 2026)
• 49 CFR 173.140, hazard class definitions (read November 2, 2026)
• PHMSA: Emergency Response Guidebook 2024 English PDF, numerical index (read via the Internet Archive capture of October 31, 2026; read November 2, 2026)