Transport reference
UN 1005 — Ammonia, anhydrous
Table A of ADR 2025 and the 49 CFR 172.101 Hazardous Materials Table for this number, kept side by side and never merged, plus the CLP label elements of the substances that ship under it.
The two tables are never merged. The same UN number can carry a different packing group, a different proper shipping name and entirely different special provisions in each system. Every value below sits under the name of the jurisdiction it comes from.
01 · Two jurisdictions
UN 1005 in ADR 2025 and in 49 CFR 172.101
The two systems differ for this number on 3 of 5 fields. Special provisions are deliberately absent from this comparison: identical code numbers mean different things in the two systems.
| Field | ADR 2025 Table A, Chapter 3.2 | 49 CFR 172.101 eCFR 2026-08-03 |
|---|---|---|
| Proper shipping name | AMMONIA, ANHYDROUS | Ammonia, anhydrous |
| Class or division | 2 | 2.3, 2.2 |
| Packing group | — | — |
| Label codes | 2.3, 8 | 2.3, 8, 2.2 |
| Rows in the table | 1 | 2 |
Sources: ADR 2025, Table A of Chapter 3.2 · ECE/TRANS/352 Vol. I (UNECE) · 49 CFR 172.101 Hazardous Materials Table · eCFR, revision 2026-08-03
02 · ADR 2025
UN 1005 in Table A of ADR 2025
One row in Table A of Chapter 3.2. Every value below comes from that row.
| Proper shipping name (3.1.2) | Class | Classification code | PG | Labels | Transport category | Hazard ID |
|---|---|---|---|---|---|---|
| AMMONIA, ANHYDROUS | 2 | 2TC | — | 2.3, 8 | 1 | 268 |
Source: ADR 2025, Table A of Chapter 3.2 · ECE/TRANS/352 Vol. I (UNECE). Class 2 is “Gases” (ADR 2.1.1.1).
Transport category and the 1 000-point exemption
Column (15) of Table A decides whether a load stays under the exemption of ADR 1.1.3.6. Quantities of different categories are added with the multipliers below, and the sum must not exceed 1 000.
| Category | Max total quantity per transport unit | Multiplier in 1.1.3.6.4 | What it means |
|---|---|---|---|
| 1 | 50 | × 20 | Packing group I and the listed classes — the exemption runs out after 20 kg or litres per transport unit. |
Footnote a to the table in 1.1.3.6.3 applies to UN 1005: the maximum total quantity per transport unit is 50 kg and the multiplier is 20, not 50.
Source: ADR 2025, 1.1.3.6.3 and 1.1.3.6.4 · ECE/TRANS/352 Vol. I (UNECE).
Special provisions — ADR 2025, Chapter 3.3
Codes from column (6) of Table A, with the text of Chapter 3.3.1. These are ADR provisions only. A code with the same number exists in 49 CFR 172.102 and means something else there — the two lists are never combined.
| SP 23 | Even though this substance has a flammability hazard, it only exhibits such hazard under extreme fire conditions in confined areas. |
| SP 379 | Anhydrous ammonia adsorbed or absorbed on a solid contained in ammonia dispensing systems or receptacles intended to form part of such systems are not subject to the other provisions of ADR if the following conditions are observed: (a) The adsorption or absorption presents the following properties: (i) The pressure at a temperature of 20 °C in the receptacle is less than 0.6 bar; (ii) The pressure at a temperature of 35 °C in the receptacle is less than 1 bar; (iii) The pressure at a temperature of 85 °C in the receptacle is less than 12 bar. (b) The adsorbent or absorbent material shall not have dangerous properties listed in classes 1 to 8; (c) The maximum contents of a receptacle shall be 10 kg of ammonia; and (d) Receptacles containing adsorbed or absorbed ammonia shall meet the following conditions: (i) Receptacles shall be made of a material compatible with ammonia as specified in ISO 11114-1:2020; (ii) Receptacles and their means of closure shall be hermetically sealed and able to contain the generated ammonia; (iii) Each receptacle shall be able to withstand the pressure generated at 85 °C with a volumetric expansion no greater than 0.1 %; (iv) Each receptacle shall be fitted with a device that allows for gas evacuation once pressure exceeds 15 bar without violent rupture, explosion or projection; and (v) Each receptacle shall be able to withstand a pressure of 20 bar without leakage when the pressure relief device is deactivated. When carried in an ammonia dispenser, the receptacles shall be connected to the dispenser in such a way that the assembly is guaranteed to have the same strength as a single receptacle. The properties of mechanical strength mentioned in this special provision shall be tested using a prototype of a receptacle and/or dispenser filled to nominal capacity, by increasing the temperature until the specified pressures are reached. The test results shall be documented, shall be traceable and shall be communicated to the relevant authorities upon request. 380 and 381 (Reserved) |
Source: ADR 2025, Chapter 3.3 special provisions · ECE/TRANS/352 Vol. I (UNECE)
Carriage provisions — CV codes
| CV10 | Cylinders must be laid parallel or at right angles to the axis and secured. |
| CV36 | Preferably loaded in open or ventilated vehicles; if closed, warning about ventilation before entry. · relevant to segregation on the vehicle |
| CV9 | Packages must not be thrown or subjected to impact. |
Source: ADR 2025, 7.5.11 · ECE/TRANS/352 Vol. II (UNECE)
Not imported and therefore not shown for this number: limited quantities (column 7a), excepted quantities (7b), packing instructions (8), tank codes (10–13) and the tunnel restriction code (15). An empty section is more honest than borrowed text.
03 · United States
UN 1005 in the 49 CFR 172.101 Hazardous Materials Table
2 separate rows in the Hazardous Materials Table. Where the rows differ only by the symbol in column (1), that symbol is what tells them apart — “D” is domestic-only, “I” is international.
| Symbols (1) | Proper shipping name (2) | Class (3) | PG (5) | Labels (6) | Packaging (8) | Quantity limits (9) | Vessel stowage (10) |
|---|---|---|---|---|---|---|---|
| I | Ammonia, anhydrous | 2.3 | — | 2.3, 8 | §173.None · §173.304 · §173.314, 315 | Forbidden passenger Forbidden cargo | D · 40, 52, 57 |
| D | Ammonia, anhydrous | 2.2 | — | 2.2 | §173.None · §173.304 · §173.314, 315 | Forbidden passenger Forbidden cargo | D · 40, 52, 57 |
Source: 49 CFR 172.101 Hazardous Materials Table · eCFR, revision 2026-08-03. Class 2.3 is “Poisonous gas” (49 CFR 173.2). Packaging cells are section references into 49 CFR part 173: exceptions, non-bulk, bulk. Handling codes in column 10B are defined in 49 CFR 176.84, which is not part of our import — the numbers are shown as printed in the table.
What the column (1) symbols mean
| D | Domestic only. A proper shipping name appropriate for describing materials for domestic transportation but which may be inappropriate for international transportation under IMO or ICAO provisions. |
| I | International. A proper shipping name appropriate for describing materials in international transportation. An alternate proper shipping name may be selected when only domestic transportation is involved. |
Source: 49 CFR 172.101(b) · eCFR, revision 2026-08-03
Vessel stowage categories on this entry
| D | Must be stowed “on deck only” on a cargo vessel or on a passenger vessel within the 25-passenger limit; prohibited on a passenger vessel above that limit. |
Source: 49 CFR 172.101(k) · eCFR, revision 2026-08-03
Special provisions — 49 CFR 172.102
Codes from column (7) of the Hazardous Materials Table, with the text of § 172.102. These are United States provisions only and have nothing to do with the ADR codes above, even where the number is identical.
| 13 | The words “Inhalation Hazard” shall be entered on each shipping paper in association with the shipping description, shall be marked on each non-bulk package in association with the proper shipping name and identification number, and shall be marked on two opposing sides of each bulk package. Size of marking on bulk package must conform to § 172.302(b) of this subchapter. The requirements of §§ 172.203(m) and 172.505 of this subchapter do not apply. |
| 379 | When offered for transport by highway, rail, or cargo vessel, anhydrous ammonia adsorbed or absorbed on a solid contained in ammonia dispensing systems or receptacles intended to form part of such systems is not subject to the requirements of this subchapter if the following conditions in this provision are met. In addition to meeting the conditions in this provision, transport on cargo aircraft only may be authorized with prior approval of the Associate Administrator. a. The adsorption or absorption presents the following properties: (1) The pressure at a temperature of 20 °C (68 °F) in the receptacle is less than 0.6 bar (60 kPa); (2) The pressure at a temperature of 35 °C (95 °F) in the receptacle is less than 1 bar (100 kPa); (3) The pressure at a temperature of 85 °C (185 °F) in the receptacle is less than 12 bar (1200 kPa). b. The adsorbent or absorbent material shall not meet the definition or criteria for inclusion in Classes 1 to 8; c. The maximum contents of a receptacle shall be 10 kg of ammonia; and d. Receptacles containing adsorbed or absorbed ammonia shall meet the following conditions: (1) Receptacles shall be made of a material compatible with ammonia as specified in ISO 11114-1:2012(E) and ISO 11114-1:2012/Amd 1:2017(E) (IBR, see § 171.7 of this subchapter); (2) Receptacles and their means of closure shall be hermetically sealed and able to contain the generated ammonia; (3) Each receptacle shall be able to withstand the pressure generated at 85 °C (185 °F) with a volumetric expansion no greater than 0.1%; (4) Each receptacle shall be fitted with a device that allows for gas evacuation once pressure exceeds 15 bar (1500 kPa) without violent rupture, explosion or projection; and (5) Each receptacle shall be able to withstand a pressure of 20 bar (2000 kPa) without leakage when the pressure relief device is deactivated. e. When offered for transport in an ammonia dispenser, the receptacles shall be connected to the dispenser in such a way that the assembly is guaranteed to have the same strength as a single receptacle. f. The properties of mechanical strength mentioned in this special provision shall be tested using a prototype of a receptacle and/or dispenser filled to nominal capacity, by increasing the temperature until the specified pressures are reached. g. The test results shall be documented, shall be traceable, and shall be made available to a representative of the Department upon request. |
| 4 | This material is poisonous by inhalation (see § 171.8 of this subchapter) in Hazard Zone D (see § 173.116(a) of this subchapter), and must be described as an inhalation hazard under the provisions of this subchapter. |
| N87 | The use of copper valves on UN pressure receptacles is prohibited. |
| T50 | When portable tank instruction T50 is indicated in Column (7) of the § 172.101 Hazardous Materials Table, the applicable liquefied compressed gas and chemical under pressure descriptions are authorized to be transported in portable tanks in accordance with the requirements of § 173.313 of this subchapter. |
Source: 49 CFR 172.102 special provisions · eCFR, revision 2026-08-03
04 · Orange plate
The orange-coloured plate for UN 1005
The upper half of the plate carries the hazard identification number, the lower half the UN number. Dimensions follow ADR 5.3.2.2.1: 400 × 300 mm, black border and dividing line 15 mm, figures 100 mm high.
268 — toxic gas, corrosive.
| 2 | Emission of gas due to pressure or to chemical reaction |
| 6 | Toxicity or risk of infection |
| 8 | Corrosivity |
Source: ADR 2025, 5.3.2.3 · ECE/TRANS/352 Vol. II (UNECE). The tunnel restriction code of column (15) is a different value and is not part of our import.
05 · Substances
Substances shipped under UN 1005
Linked by CAS number, never by name: a name match once produced “acetone cyanohydrin” for acetone, and a wrong link here would be a wrong classification. Each entry opens its own reference page with the CLP classification and label elements.
06 · The label side
What UN 1005 looks like on a workplace label
The tables above are the transport classification. This is the other half of the same material: the CLP label elements of the substances linked to this number — what actually goes on the drum once it has been delivered. Transport marks and supply labels answer different regulations and do not replace one another.
Hazard statements on the substances under UN 1005
| H221 | Flammable gas. |
| H314 | Causes severe skin burns and eye damage. |
| H331 | Toxic if inhaled. |
| H400 | Very toxic to aquatic life. |
Source: harmonised classification, EU CLP Annex VI. Transport classification and supply classification are decided under different rules and do not have to agree.
07 · FAQ
UN 1005 — frequently asked questions
What is UN 1005?
UN 1005 is the United Nations number for Ammonia, anhydrous. Under ADR 2025 it is assigned to class 2 (gases), classification code 2TC.
Is UN 1005 classified the same way in the United States and in Europe?
No. For UN 1005 the two tables differ on class or division, label codes, rows in the table. Each panel on this page shows its own source; values from one system must not be carried over into the other.
What is the hazard identification number for UN 1005?
The orange-coloured plate for UN 1005 carries the hazard identification number 268 above the UN number. Under ADR 5.3.2.3.2 that number means: toxic gas, corrosive.
What is the transport category of UN 1005?
Column (15) of Table A puts UN 1005 in transport category 1. Under ADR 1.1.3.6.3 the maximum total quantity per transport unit for that category is 20, except that footnote a to the table caps this UN number at 50 kg.
Which substances ship under UN 1005?
We hold 1 substance linked to UN 1005 by CAS number, 1 of which also has a full safety data sheet on this site. Each one has its own reference page with the CLP classification, GHS pictograms and hazard statements that apply on the label — the workplace side of the same material.
Need the plate, the labels or the placards printed?
The orange plate above is a physical article, and so are the class labels in column (5). Our sister site GHSLabels.com covers printing and suppliers. For the workplace label of the same material, use the GHS label constructor, and browse other numbers in the UN number reference.
Reference aid only. Values are reproduced from ADR 2025 and the 49 CFR 172.101 table as published; the consignor remains responsible for the classification of a specific consignment. Always verify against the current published regulation and the supplier's safety data sheet.