UN/NA Number Search
Enter the four-digit UN/NA number without any UN or NA prefix (e.g., “1017” for chlorine). This is the easiest way of searching a substance if you have the UN/NA number.
With the “contains” search option, the system searches for substances containing the typed word(s).
This allows for a wide range of results (e.g., searching for "methan"
returns 100 results, including “Chlorohmethane” and
searching for “methanol” yields five results,
including “Phenylmethanol” and
With the “begins with” search option, the system searches for substances beginning with the typed word(s) in sequence, including space. This gives fewer results and requires better knowledge of how the substances are spelled (e.g., typing in "fluor" will return 20 results; “fluorine” will return three results).
Pay attention to space, punctuation and word order, as the system searches for a substance exactly as you type it in (e.g., typing “dimethyl chlorine” will NOT find “chlorine, dimethyl” because the punctuation and word order are different). The system ignores prefixes with numbers and returns results only with the name (e.g., searching for “diaminohexane” will return “1,6-Diaminohexane”).
Search results are displayed in upper- and lower-case letters: the former indicates the Proper Shipping Names (as used in the IMDG Code) of substances; the latter synonyms. Click on a substance to see both the Proper Shipping Name and all existing synonyms. For substances that can be transported both in bulk and in packaged form, the search results will differentiate between the two modes of transport and show respective HNS classification and contribution account.
Filter search results by HNS Contributing account type.
Display HNS alphabetically.
What are HNS?
A substance is classed as HNS in the 2010 HNS Convention if it is included in one or more lists from the relevant IMO instruments designed to ensure maritime safety and prevention of pollution. These substances are:
- Oils, carried in bulk, as defined in regulation 1 of annex I to MARPOL 73/78.
- Noxious liquid substances, carried in bulk, as defined in regulation 1.10 of Annex II MARPOL 73/78, and those substances provisionally categorized as pollution category X, Y or Z and listed in MEPC 2 Circulars for substances subject to tripartite agreements.
- Dangerous liquid substances carried in bulk listed in chapter 17 of the IBC Code.
- Dangerous, hazardous and harmful substances, materials and articles in packaged form covered by the IMDG Code, in effect in 1996.
- Liquefied gases as listed in chapter 19 of the IGC Code.
- Liquid substances carried in bulk with a Flash Point not exceeding 60°C.
- Solid bulk materials possessing chemical hazards covered by the IMSBC Code to the extent that these substances are also subject to the provisions of the IMDG Code in effect in 1996, when carried in packaged form.
Several thousand substances are included on these lists and many are covered under more than one category of the Convention definitions of HNS.
Many chemicals and substances have several names or synonyms that can be used to describe them. The primary name used to describe a substance or chemical in the IMO Codes is the Proper Shipping Name (PSN) for those listed the IMDG Code, the Proper Name (PN) for those substances listed in the IBC Code and the Bulk Cargo Shipping Name (BCSN) for those listed in the IMSBC Code. In many cases these are identical for the same substance, but in some cases they are not and a primary name used in one definition is often a synonym used in another definition. The HNS Finder uses the Proper Shipping Name as the primary name for substances listed in the IMDG Code even if these substances are transported in bulk.
HNS can be sub-divided into different categories. For instance, they are categorized by their physical state (gases, liquids and solids) or by the potential hazards that they present (flammable, explosive, toxic, corrosive or reactive). The 2010 HNS Convention distinguishes substances based on whether they are transported in bulk or in packaged form.
“Bulk HNS” include solids and liquids, including oils and liquefied gases transported in bulk.
- Bulk gases: All liquefied gases which are transported in bulk are included, such as Liquefied Natural Gas, Liquefied Petroleum Gas, ammonia, ethylene, butadiene, ethane and propylene.
- Bulk solids: Many of the major bulk solids are excluded since they do not possess chemical hazards (e.g., iron ore, grain, bauxite and alumina, phosphate rock, cement and some fertilizers). Others are classified as hazardous material only in bulk, but are not considered as HNS (e.g., coal, reduced iron and woodchip). Bulk solids that are covered under the Convention include some fertilizers, sodium and potassium nitrates, sulphur and some types of fishmeal.
- Bulk liquids: These are included if they present safety, pollution or explosion hazards and include organic chemicals (e.g., methanol, xylenes and styrene), inorganic chemicals (e.g., sulphuric acid, phosphoric acid and caustic soda) and vegetable and animal oils and fats (e.g., palm oil, soybean oil and tallow). Both persistent and non-persistent oils of petroleum origin are also included.