Extended Operational and Trade Vocabulary

IMDG Code, Classes, Packing and Segregation glossary (page 4)

The dangerous-goods vocabulary anchored in the IMDG Code: the hazard classes, packing groups and provisions, segregation tables, the EmS fire and spill schedules, acceptance checks under IMDG 1.4, and on-deck accessibility for firefighting. Grounds each term in the IMDG Code provision that governs the carriage of packaged dangerous goods.

1120 defined terms.

Showing 250 on this page (page 4 of 5).

S

Segregation Group SGG16 Peroxides: Group including some inorganic peroxides such as UN 1457 calcium peroxide.
Segregation Group SGG17 Azides: Group containing UN 1571 barium azide wetted.
Segregation Group SGG18 Alkalis: Group containing UN 1823 sodium hydroxide solid.
Segregation Group SGG2 Ammonium Compounds: Group containing UN 1942 ammonium nitrate and similar.
Segregation Group SGG3 Bromates: Group containing UN 1473 magnesium bromate.
Segregation Group SGG4 Chlorates: Group containing UN 1485 potassium chlorate.
Segregation Group SGG5 Chlorites: Group containing UN 1496 sodium chlorite.
Segregation Group SGG6 Cyanides: Group containing UN 1588 inorganic cyanides solid NOS.
Segregation Group SGG7 Heavy Metals and Their Salts: Group including various lead and mercury compounds.
Segregation Group SGG8 Hypochlorites: Group containing UN 1748 calcium hypochlorite dry.
Segregation Group SGG9 Lead and Its Compounds: Group including UN 1616 lead acetate.
Segregation Table: Table 7.2.4 of IMDG specifying default segregation between classes and subsidiary risks.
Segregation Term: Words such as Away From, Separated From, Separated By A Complete Compartment From and Separated Longitudinally By An Intervening Complete Compartment Or Hold From.
Self Accelerating Polymerization Temperature: SAPT for polymerizing Class 4.1 substances, governing temperature controlled transport.
Self Heating Substance: Substance liable to heat up in air without external energy supply, Class 4.2 NOS UN 3088, 3127.
Self Reactive Substance: Class 4.1 substance liable to undergo exothermic decomposition without participation of oxygen, types A to G.
Semi Trailer: Road CTU used in Ro Ro IMDG carriage, subject to securing under CSS Code.
Sensitivity Test: Friction, impact and thermal stability tests in the UN Manual of Tests and Criteria.
Separated By A Complete Compartment From: Stronger segregation term requiring complete compartment between cargoes.
Separated From: Segregation term requiring separation by deck or bulkhead resistant to fire and liquid.
Separated Longitudinally By An Intervening Complete Compartment Or Hold From: Strongest segregation term in IMDG 7.2.1.
SG1 Away From: Specific code that may be assigned to particular UN entries to require Away From segregation.
SG6 Stow Away From Class 1: Example specific segregation code requiring distance from explosives.
Shipboard Emergency Plan: Plan referenced by SOPEP for oil pollution and by IMDG and SOLAS for dangerous goods incidents.
Shipper: The cargo interest contracting with the carrier for carriage of goods.
Shipping Documents: Set including DGD, bill of lading and any required certificates.
Side Bearing: Structural component of portable tanks ensuring distribution of load during sea transport.
Silicon Tetrachloride: UN 1818, Class 8 corrosive liquid Packing Group II.
Silver Nitrate: UN 1493, Class 5.1 oxidizer Packing Group II.
Single Packaging: Packaging that does not require inner packagings to perform a containment function, such as UN approved drums and IBCs.
Six Sides: IMDG requirement that a CTU placard or mark with marine pollutant or lithium battery may be required on more than two sides depending on rules.
Smoke detector: Optical or ionization sensor in machinery spaces under SOLAS II-2/7.
SOC Container: Shipper Owned Container, accepted for IMDG if CSC compliant and structurally sound.
Sodium: Element in fuel acting alongside vanadium to cause high-temperature corrosion.
Sodium Aluminate Solid: UN 2812, Class 8 corrosive solid Packing Group III.
Sodium Chlorate: UN 1495, Class 5.1 oxidizer Packing Group II.
Sodium Cyanide Solid: UN 1689, Class 6.1 Packing Group I.
Sodium Hydroxide Solid: UN 1823, Class 8 corrosive solid Packing Group II.
Sodium Hydroxide Solution: IBC Category Y; corrosive.
Sodium Hypochlorite Solution: UN 1791, Class 8 corrosive liquid.
Sodium Methylate: UN 1431 dry Class 4.2 with Class 8 subsidiary risk, or UN 1289 solution Class 3 with Class 8 subsidiary risk.
Sodium Nitrate: UN 1498, Class 5.1 oxidizer Packing Group III.
Sodium Peroxide: UN 1504, Class 5.1 oxidizer Packing Group I.
SOLAS: International Convention for the Safety of Life at Sea, 1974; the IMO treaty setting minimum construction, equipment, and operation standards for merchant ships.
SOLAS Chapter II-2 Regulation 19: Regulation requiring DGDOC for carriage of packaged dangerous goods.
SOLAS Chapter VI Regulation 5: Stowage and securing requirements applicable to all cargoes, complementary to IMDG.
SOLAS Chapter VII Part A: Carriage of dangerous goods in packaged form, the legal hook for IMDG.
SOLAS Chapter VII Part B: Construction and equipment of ships carrying dangerous liquid chemicals in bulk, the hook for IBC and BCH codes.
Solid: Substance in solid state at 20 degrees Celsius and 101.3 kPa, with relevant tests under IMDG 2.3.4.
Solid Bulk Cargo: Material loaded in bulk into the cargo space of a ship, IMSBC governs and overlaps with IMDG for dangerous bulk solids.
Solid Inorganic NOS: Generic UN entries such as UN 3261 Corrosive Solid Acidic Inorganic NOS.
Solid Organic NOS: Generic UN entries such as UN 3147 Dye Solid Corrosive NOS.
Solvent Naphtha: UN 1256 or UN 2553 depending on family.
SP: Special Provision prefix used in IMDG column 6 of the Dangerous Goods List.
SP188: Special Provision for lithium batteries shipped under reduced requirements with packaging and watt hour rating limits.
SP230: Special Provision for lithium batteries with detailed packaging, marking and Watt hour limits per cell and battery.
SP240: Special Provision exempting certain battery powered vehicles and equipment from Class 9 lithium battery provisions.
SP303: Special Provision for receptacles small containing gas such as CO2 cartridges UN 2037.
SP310: Special Provision for prototype and small production runs of lithium batteries.
SP376: Special Provision for damaged, defective or recycled lithium batteries, with strict packaging or carriage approval requirements.
SP384: Special Provision noting safety devices for lithium batteries.
SP387: Special Provision for lithium ion batteries containing both lithium ion and lithium metal cells.
SP400: Special Provision for certain organic peroxide types and concentrations.
Special Form Radioactive Material: Class 7 material in solid form or sealed capsule with specified resistance to dispersion.
Special Provision: Provision attached to specific UN entries, identified by SP numbers in column 6 of the DGL.
Specific Activity: Activity per unit mass of a radionuclide, used in Class 7 classification.
Sphericity: Geometric measure of bulk solid particle shape; relevant to IMSBC classification more than IMDG packaged goods.
Spill Procedures: Steps prescribed in EmS S schedules for response to release of dangerous goods at sea.
Spillproof: Design feature of certain Class 8 batteries qualifying for UN 2800 exemptions.
Stack Test: Stacking compression test on IBCs and large packagings under IMDG 6.5 and 6.6.
Standard Operating Procedure: Documented procedure for IMDG handling, packaging and inspection.
Statement of Compliance: Document supporting that a cargo meets IMDG criteria, often issued by laboratories or competent authorities.
Steel Drum: Packaging codes 1A1 non removable head and 1A2 removable head.
Stevedore: Shore-based cargo handler.
Stibine: UN 2676, Class 2.3 with Class 2.1 subsidiary risk.
Stopping the Loading: Decision under IMDG carrier rights when packaging defects, segregation issues or documentation errors are found.
Stowage Category: Letter A to E in column 16a of the DGL specifying allowable stowage location on cargo and passenger ships.
Stowage Category A: On deck or under deck on cargo ships and passenger ships, the least restrictive category.
Stowage Category B: On deck or under deck on cargo ships, and on deck only on passenger ships carrying not more than 25 passengers or one passenger per 3 m of length.
Stowage Category C: On deck only on cargo ships and passenger ships meeting conditions in column 16a.
Stowage Category D: On deck only on cargo ships, on deck only on passenger ships meeting specified conditions.
Stowage Category E: On deck or under deck on cargo ships and prohibited on passenger ships.
Stowage Code SW1: Protected from sources of heat.
Stowage Code SW10: Cargo transport units shall be shaded from direct sunlight.
Stowage Code SW11: Stow safe from accidental damage.
Stowage Code SW12: Under deck stowage shall be in a mechanically ventilated cargo space.
Stowage Code SW13: The control temperature and emergency temperature shall be shown in the transport document and on the package.
Stowage Code SW14: Stow at least 6 m horizontally from accommodation spaces.
Stowage Code SW15: For mechanically ventilated and refrigerated cargo spaces only.
Stowage Code SW16: Protect from direct sunshine for the duration of carriage in port.
Stowage Code SW17: Closed cargo transport units may be stowed on deck only.
Stowage Code SW18: Open or closed cargo transport units may be stowed under deck or on deck.
Stowage Code SW19: In a magazine type B or stowed in a closed cargo transport unit.
Stowage Code SW2: Clear of living quarters.
Stowage Code SW20: Stow in such a way that the packaging is not damaged.
Stowage Code SW21: Stowage of detonators in compatibility group B with other Class 1 substances requires separation by an approved division.
Stowage Code SW22: For Class 1 articles stowed in a magazine.
Stowage Code SW23: When transported under exclusive use the package or unit shall be subject to additional requirements.
Stowage Code SW24: This substance is liable to liquefaction if transported at temperatures above its melting point.
Stowage Code SW25: For Class 1 substances and articles stowed in magazine type B; refer to IMDG Code.
Stowage Code SW26: For cargo transport units only on deck.
Stowage Code SW27: Where Marine Pollutant marking required on packages.
Stowage Code SW28: Wash with copious quantities of water any spillage.
Stowage Code SW3: Temperature controlled in accordance with the relevant requirements of 7.1.7.
Stowage Code SW4: Stow in a mechanically ventilated space.
Stowage Code SW5: Stow protected from sources of heat under arrangements that maintain low temperature.
Stowage Code SW7: Stow at least 3 m horizontally away from heat sources.
Stowage Code SW8: Wear protective clothing and equipment.
Stowage Code SW9: Stowage shall be in such a manner as to permit easy access for inspection.
Stowage Codes Column: Column 16b of the Dangerous Goods List listing SW codes per UN entry.
Strontium Nitrate: UN 1507, Class 5.1 oxidizer Packing Group III.
Strontium Phosphide: UN 2013, Class 4.3 with Class 6.1 subsidiary risk.
Subsidiary Risk: Hazard of a substance in addition to its primary class, shown by additional label and in parentheses on documentation.
Sulfur Dioxide: UN 1079, Class 2.3 with Class 8 subsidiary risk.
Sulfuric Acid Fuming: UN 1831, Class 8 with Class 6.1 subsidiary risk, Packing Group I.
Sulfuric Acid with More Than 51 Percent Acid: UN 1830, Class 8 corrosive Packing Group II.
Surface Contaminated Objects: Class 7 category SCO-I and SCO-II under IMDG 2.7.1.5.
Surveyor: independent expert appointed to investigate cause and extent of loss.

T

T1 Portable Tank Instruction: Lowest pressure, lowest hazard portable tank specification with 1.5 bar minimum test pressure.
T10 Portable Tank Instruction: Tank used for substances with higher MAWP than T9.
T11 Portable Tank Instruction: Tank used for Class 3, 6.1 and 8 PG II substances at 4 bar minimum test pressure.
T12 Portable Tank Instruction: Tank used for Class 8 PG I substances with bottom outlet restrictions.
T13 Portable Tank Instruction: Tank used for Class 6.1 PG I substances with stricter relief and outlet rules.
T14 Portable Tank Instruction: Tank used for some highly toxic Class 6.1 PG I substances.
T15 to T22 Portable Tank Instructions: Tanks used for high pressure or particularly hazardous substances.
T2 Portable Tank Instruction: Slightly higher pressure tank used for some Class 3 PG III substances.
T23 Portable Tank Instruction: Tank used for organic peroxides and self reactive substances with temperature control.
T3 Portable Tank Instruction: Pressure tank used for Class 6.1 PG III and certain Class 8 entries.
T4 Portable Tank Instruction: Tank used for Class 3 PG II flammable liquids.
T5 Portable Tank Instruction: Tank used for some Class 5.1 oxidizers and Class 6.1 PG II substances.
T50 Portable Tank Instruction: Tank used for non refrigerated liquefied gases.
T6 Portable Tank Instruction: Pressure tank for medium hazard substances.
T7 Portable Tank Instruction: Tank for higher pressure substances.
T75 Portable Tank Instruction: Tank used for refrigerated liquefied gases.
T8 Portable Tank Instruction: Tank used for Class 6.1 PG I and II substances with specified relief settings.
T9 Portable Tank Instruction: Tank used for certain elevated temperature substances.
Tank container: ISO tank container for liquids and gases.
Tank Instruction Column: Column 13 of the Dangerous Goods List indicating allowed portable tank instructions.
Tank Pressure: Operating cargo tank pressure typically 1.06 to 1.25 barg.
Tank Record: Documentation maintained by tank owner showing periodic inspections and tests under IMDG 6.7.2.20.
Tank Vehicle: Road tanker, not a portable tank under IMDG, governed by ADR for road carriage.
Tanker Endorsement: Tanker specific STCW Chapter V certificate.
Tannins: Generally not regulated, illustrating that not all chemicals are dangerous goods under IMDG.
Tar Liquid: UN 1999, Class 3 flammable liquid Packing Group II or III.
Temperature Control: Required for some Class 4.1 self reactive and Class 5.2 organic peroxide entries with SADT at or below 55 degrees Celsius.
Temperature Controlled Cargo: Cargo requiring reefer container or refrigerated hold per IMDG 7.1.7.
Test Pressure: Hydraulic test pressure for cylinders and portable tanks, specified in IMDG 6.2 and 6.7.
Tetraethyl Lead: UN 1649, Class 6.1 toxic liquid Packing Group I.
Tetrafluoroethane: UN 3159, Class 2.2 non flammable gas.
Tetranitromethane: UN 1510, Class 5.1 oxidizer with Class 6.1 subsidiary risk, Packing Group I.
Thallium Compounds NOS: UN 1707, Class 6.1.
Theoretical Maximum Density: Concept not directly used in IMDG but underlies bulk cargo trim and stability checks.
Thermal Decomposition: Process driving Class 5.2 organic peroxide hazards.
Thermal stability: Resistance of fuel to chemical change on heating in the fuel system upstream of injection.
Thionyl Chloride: UN 1836, Class 8 corrosive liquid Packing Group I.
Tilt Test: Test on certain Class 1 articles to assess movement during transport.
TIR Carnet: International road transit document under the TIR Convention.
Toluene: UN 1294, Class 3 flammable liquid Packing Group II.
Toluene Diisocyanate: UN 2078, Class 6.1 toxic liquid Packing Group II.
Top Lift: Method of lifting containers by top corner castings; tank containers must withstand top lift loads per ISO standards.
Total Activity: Sum of radioactivity of all radionuclides in a package, basis for Class 7 categorization.
Toxic Gas: Class 2.3 gas.
Toxic Liquid Inorganic NOS: UN 3287, Class 6.1.
Toxic Liquid Organic NOS: UN 2810, Class 6.1.
Toxic Solid Inorganic NOS: UN 3288, Class 6.1.
Toxic Solid Organic NOS: UN 2811, Class 6.1.
Trace Heating: Resistive heating cables used to keep pipes and panels above the freezing point in marine installations.
Trade Name: Commercial name for a chemical; IMDG requires proper shipping name rather than trade name on documentation.
Trans 1,2 Dichloroethylene: UN 1150, Class 3 flammable liquid Packing Group II.
Transport Document: DGD or equivalent paper or electronic document conveying IMDG information through the chain.
Transport in Bulk Forbidden: Statement in some entries of the Dangerous Goods List restricting to packaged transport only.
Transport Index: TI, single dimensionless number assigned to Class 7 packages, overpacks and CTUs reflecting external dose rate.
Trimethylamine Anhydrous: UN 1083, Class 2.1 flammable gas.
Trinitrotoluene: UN 0209 dry or wetted Class 1.1D.
Tube: Transportable pressure receptacle with water capacity over 150 and up to 3000 liters.
Turpentine: UN 1299, Class 3 flammable liquid Packing Group III.
Type 1 Package: Class 7 industrial package IP-1 for materials of low specific activity.
Type 2 Package: Class 7 industrial package IP-2 with stricter integrity test.
Type 3 Package: Class 7 industrial package IP-3 designed to maintain integrity in normal conditions of transport.
Type A Package: Class 7 package designed to retain contents under normal conditions of transport.
Type B Package: Class 7 package designed to maintain integrity under both normal and accident conditions.
Type C Package: Class 7 package designed for air transport of large quantities of activity, defined by IAEA SSR-6.
Type Test: Initial design test on packagings, IBCs, large packagings, portable tanks and Class 7 packages under IMDG Part 6.

U

UEL: Upper Explosive Limit, the maximum concentration of a flammable gas in air supporting combustion.
Ullage: Empty space above liquid cargo in a tank.
UN 1001: Acetylene dissolved Class 2.1.
UN 1005: Ammonia anhydrous Class 2.3 with Class 8 subsidiary risk.
UN 1006: Argon compressed Class 2.2.
UN 1011: Butane Class 2.1.
UN 1017: Chlorine Class 2.3 with Class 8 subsidiary risk.
UN 1040: Ethylene oxide Class 2.3 with Class 2.1 subsidiary risk.
UN 1049: Hydrogen compressed Class 2.1.
UN 1066: Nitrogen compressed Class 2.2.
UN 1072: Oxygen compressed Class 2.2 with Class 5.1 subsidiary risk.
UN 1075: Petroleum gases liquefied Class 2.1.
UN 1076: Phosgene Class 2.3 with Class 8 subsidiary risk.
UN 1079: Sulfur dioxide Class 2.3 with Class 8 subsidiary risk.
UN 1090: Acetone Class 3 PG II.
UN 1098: Allyl alcohol Class 6.1 with Class 3 subsidiary risk.
UN 1170: Ethanol Class 3 PG II or III.
UN 1202: Gas oil or diesel fuel or heating oil light Class 3 PG III.
UN 1203: Gasoline Class 3 PG II.
UN 1230: Methanol Class 3 with Class 6.1 subsidiary risk PG II.
UN 1263: Paint Class 3 with PG by flash point and viscosity.
UN 1267: Petroleum crude oil Class 3.
UN 1268: Petroleum distillates NOS Class 3.
UN 1294: Toluene Class 3 PG II.
UN 1295: Trichlorosilane Class 4.3 with Class 3 and 8 subsidiary risks.
UN 1396: Aluminium powder uncoated Class 4.3.
UN 1402: Calcium carbide Class 4.3.
UN 1428: Sodium Class 4.3.
UN 1438: Aluminium nitrate Class 5.1.
UN 1444: Ammonium persulfate Class 5.1.
UN 1448: Barium permanganate Class 5.1 PG II.
UN 1474: Magnesium nitrate Class 5.1 PG III.
UN 1486: Potassium nitrate Class 5.1 PG III.
UN 1495: Sodium chlorate Class 5.1 PG II.
UN 1498: Sodium nitrate Class 5.1 PG III.
UN 1547: Aniline Class 6.1 PG II.
UN 1580: Chloropicrin Class 6.1 PG I.
UN 1654: Nicotine Class 6.1 PG II.
UN 1680: Potassium cyanide solid Class 6.1 PG I.
UN 1689: Sodium cyanide solid Class 6.1 PG I.
UN 1748: Calcium hypochlorite dry Class 5.1.
UN 1789: Hydrochloric acid Class 8.
UN 1791: Hypochlorite solution Class 8.
UN 1805: Phosphoric acid solution Class 8 PG III.
UN 1813: Potassium hydroxide solid Class 8 PG II.
UN 1823: Sodium hydroxide solid Class 8 PG II.
UN 1824: Sodium hydroxide solution Class 8.
UN 1830: Sulfuric acid with more than 51 percent acid Class 8 PG II.
UN 1845: Carbon dioxide solid (dry ice) Class 9.
UN 1942: Ammonium nitrate Class 5.1.
UN 1950: Aerosols Class 2.
UN 1972: Methane refrigerated liquid or LNG Class 2.1.
UN 1977: Nitrogen refrigerated liquid Class 2.2.
UN 1978: Propane Class 2.1.
UN 1993: Flammable liquid NOS Class 3.
UN 1999: Tars liquid including road oils Class 3.
UN 2014: Hydrogen peroxide aqueous solution above 20 percent and not more than 60 percent Class 5.1 with Class 8 subsidiary risk.
UN 2031: Nitric acid other than red fuming Class 8 with Class 5.1 subsidiary risk for higher concentration.
UN 2059: Nitrocellulose solution flammable Class 3.
UN 2187: Carbon dioxide refrigerated liquid Class 2.2.
UN 2209: Formaldehyde solution Class 8 if less than 25 percent and meeting Class 8 criteria.
UN 2218: Acrylic acid stabilized Class 8 with Class 3 subsidiary risk.
UN 2447: Phosphorus white molten Class 4.2 with Class 6.1 subsidiary risk.
UN 2480: Methyl isocyanate Class 6.1 with Class 3 subsidiary risk.
UN 2672: Ammonia solution Class 8 between 10 and 35 percent concentration.
UN 2761: Organochlorine pesticide solid toxic Class 6.1.
UN 2794: Batteries wet filled with acid Class 8.