Class 4.3 covers substances which, by reaction with water, give off flammable gases liable to form explosive mixtures with air, and articles containing such substances.
The list below gives every UN number that ADR 2025 Table A (Chapter 3.2) assigns to Class 4.3, with its proper shipping name and packing groups. A UN number with more than one row in Table A (for example one row per packing group or per physical state) is listed once and marked with its row count; its page shows every row. Open a UN number for its classification code, labels, tunnel restriction code, transport category, limited and excepted quantities and the 1.1.3.6 exemption points. The class of a substance is assigned under ADR Part 2 (Chapter 2.2.43); this list helps you find an entry, it does not classify a product.
Entries marked “not subject to ADR” are listed in Table A but carried outside ADR under the conditions their special provision sets; entries marked “carriage prohibited” may not be carried at all.
Class 4.3 UN numbers (88)
- UN 1183ETHYLDICHLOROSILANEPG I
- UN 1242METHYLDICHLOROSILANEPG I
- UN 1295TRICHLOROSILANEPG I
- UN 1340PHOSPHORUS PENTASULPHIDE, free from yellow and white phosphorusPG II
- UN 1360CALCIUM PHOSPHIDEPG I
- UN 1389ALKALI METAL AMALGAM, LIQUIDPG I
- UN 1390ALKALI METAL AMIDESPG II
- UN 1391ALKALI METAL DISPERSION or ALKALINE EARTH METAL DISPERSIONPG I
- UN 1392ALKALINE EARTH METAL AMALGAM, LIQUIDPG I
- UN 1393ALKALINE EARTH METAL ALLOY, N.O.S.PG II
- UN 1394ALUMINIUM CARBIDEPG II
- UN 1395ALUMINIUM FERROSILICON POWDERPG II
- UN 1396ALUMINIUM POWDER, UNCOATEDPG II, III · 2 rows
- UN 1397ALUMINIUM PHOSPHIDEPG I
- UN 1398ALUMINIUM SILICON POWDER, UNCOATEDPG III
- UN 1400BARIUMPG II
- UN 1401CALCIUMPG II
- UN 1402CALCIUM CARBIDEPG I, II · 2 rows
- UN 1403CALCIUM CYANAMIDE with more than 0.1 % calcium carbidePG III
- UN 1404CALCIUM HYDRIDEPG I
- UN 1405CALCIUM SILICIDEPG II, III · 2 rows
- UN 1407CAESIUMPG I
- UN 1408FERROSILICON with 30 % or more but less than 90 % siliconPG III
- UN 1409METAL HYDRIDES, WATER-REACTIVE, N.O.S.PG I, II · 2 rows
- UN 1410LITHIUM ALUMINIUM HYDRIDEPG I
- UN 1411LITHIUM ALUMINIUM HYDRIDE, ETHEREALPG I
- UN 1413LITHIUM BOROHYDRIDEPG I
- UN 1414LITHIUM HYDRIDEPG I
- UN 1415LITHIUMPG I
- UN 1417LITHIUM SILICONPG II
- UN 1418MAGNESIUM POWDER or MAGNESIUM ALLOYS POWDERPG I, II, III · 3 rows
- UN 1419MAGNESIUM ALUMINIUM PHOSPHIDEPG I
- UN 1420POTASSIUM METAL ALLOYS, LIQUIDPG I
- UN 1421ALKALI METAL ALLOY, LIQUID, N.O.S.PG I
- UN 1422POTASSIUM SODIUM ALLOYS, LIQUIDPG I
- UN 1423RUBIDIUMPG I
- UN 1426SODIUM BOROHYDRIDEPG I
- UN 1427SODIUM HYDRIDEPG I
- UN 1428SODIUMPG I
- UN 1432SODIUM PHOSPHIDEPG I
- UN 1433STANNIC PHOSPHIDESPG I
- UN 1435ZINC ASHESPG III
- UN 1436ZINC POWDER or ZINC DUSTPG I, II, III · 3 rows
- UN 1714ZINC PHOSPHIDEPG I
- UN 1870POTASSIUM BOROHYDRIDEPG I
- UN 1928METHYL MAGNESIUM BROMIDE IN ETHYL ETHERPG I
- UN 2010MAGNESIUM HYDRIDEPG I
- UN 2011MAGNESIUM PHOSPHIDEPG I
- UN 2012POTASSIUM PHOSPHIDEPG I
- UN 2013STRONTIUM PHOSPHIDEPG I
- UN 2257POTASSIUMPG I
- UN 2463ALUMINIUM HYDRIDEPG I
- UN 2624MAGNESIUM SILICIDEPG II
- UN 2805LITHIUM HYDRIDE, FUSED SOLIDPG II
- UN 2806LITHIUM NITRIDEPG I
- UN 2813WATER-REACTIVE SOLID, N.O.S.PG I, II, III · 3 rows
- UN 2830LITHIUM FERROSILICONPG II
- UN 2835SODIUM ALUMINIUM HYDRIDEPG II
- UN 2844CALCIUM MANGANESE SILICONPG III
- UN 2950MAGNESIUM GRANULES, COATED, particle size not less than 149 micronsPG III
- UN 2965BORON TRIFLUORIDE DIMETHYL ETHERATEPG I
- UN 2968MANEB, STABILIZED or MANEB PREPARATION, STABILIZED against self-heatingPG III
- UN 2988CHLOROSILANES, WATER-REACTIVE, FLAMMABLE, CORROSIVE, N.O.S.PG I
- UN 3078CERIUM, turnings or gritty powderPG II
- UN 3129WATER-REACTIVE LIQUID, CORROSIVE, N.O.S.PG I, II, III · 3 rows
- UN 3130WATER-REACTIVE LIQUID, TOXIC, N.O.S.PG I, II, III · 3 rows
- UN 3131WATER-REACTIVE SOLID, CORROSIVE, N.O.S.PG I, II, III · 3 rows
- UN 3132WATER-REACTIVE SOLID, FLAMMABLE, N.O.S.PG I, II, III · 3 rows
- UN 3133WATER-REACTIVE SOLID, OXIDIZING, N.O.S.carriage prohibited
- UN 3134WATER-REACTIVE SOLID, TOXIC, N.O.S.PG I, II, III · 3 rows
- UN 3135WATER-REACTIVE SOLID, SELF-HEATING, N.O.S.PG I, II, III · 3 rows
- UN 3148WATER-REACTIVE LIQUID, N.O.S.PG I, II, III · 3 rows
- UN 3170ALUMINIUM SMELTING BY-PRODUCTS or ALUMINIUM REMELTING BY-PRODUCTSPG II, III · 2 rows
- UN 3208METALLIC SUBSTANCE, WATER-REACTIVE, N.O.S.PG I, II, III · 3 rows
- UN 3209METALLIC SUBSTANCE, WATER-REACTIVE, SELF-HEATING, N.O.S.PG I, II, III · 3 rows
- UN 3292BATTERIES, CONTAINING METALLIC SODIUM OR SODIUM ALLOY, or CELLS, CONTAINING METALLIC SODIUM OR SODIUM ALLOY
- UN 3395ORGANOMETALLIC SUBSTANCE, SOLID, WATER-REACTIVEPG I, II, III · 3 rows
- UN 3396ORGANOMETALLIC SUBSTANCE, SOLID, WATER-REACTIVE, FLAMMABLEPG I, II, III · 3 rows
- UN 3397ORGANOMETALLIC SUBSTANCE, SOLID, WATER-REACTIVE, SELF-HEATINGPG I, II, III · 3 rows
- UN 3398ORGANOMETALLIC SUBSTANCE, LIQUID, WATER-REACTIVEPG I, II, III · 3 rows
- UN 3399ORGANOMETALLIC SUBSTANCE, LIQUID, WATER-REACTIVE, FLAMMABLEPG I, II, III · 3 rows
- UN 3401ALKALI METAL AMALGAM, SOLIDPG I
- UN 3402ALKALINE EARTH METAL AMALGAM, SOLIDPG I
- UN 3403POTASSIUM METAL ALLOYS, SOLIDPG I
- UN 3404POTASSIUM SODIUM ALLOYS, SOLIDPG I
- UN 3476FUEL CELL CARTRIDGES or FUEL CELL CARTRIDGES CONTAINED IN EQUIPMENT or FUEL CELL CARTRIDGES PACKED WITH EQUIPMENT, containing water-reactive substances
- UN 3482ALKALI METAL DISPERSION, FLAMMABLE or ALKALINE EARTH METAL DISPERSION, FLAMMABLEPG I
- UN 3543ARTICLES CONTAINING A SUBSTANCE WHICH IN CONTACT WITH WATER EMITS FLAMMABLE GASES, N.O.S.
Other ADR classes
Class 1 · ExplosivesClass 2 · GasesClass 3 · Flammable LiquidsClass 4.1 · Flammable SolidsClass 4.2 · Spontaneously CombustibleClass 5.1 · Oxidizing SubstancesClass 5.2 · Organic PeroxidesClass 6.1 · Toxic SubstancesClass 6.2 · Infectious SubstancesClass 7 · Radioactive MaterialClass 8 · Corrosive SubstancesClass 9 · Miscellaneous