Chemical Weapons – IMDG Code

The chemical Weapon Convention (CWC) applies measures to restrict various chemicals in international trade. These restrictions are directly on dual-use chemicals. Dual use chemicals are those which have use in commercial industry but at the same time can also be used to manufacture chemical weapon.  Example Thiodiglycol, used in felt-tip pens but also a precursor to mustard gas.

A Canadian soldier with mustard gas burns, ca....

Chemical Weapon Convention (CWC) has three schedules of toxic chemicals and precursors ( see list of chemicals at the end of this article)

Schedule 1:  High risk chemicals which have no use in the commercial industry.

Schedule 2:  Toxic chemicals having significant risk; not generally produced commercially in large quantities.

Schedule 3: Toxic chemicals produced large scale commercially for legitimate purposes but also have potential to be used in chemical weapons.

For the purpose of transport of samples of chemicals taken for analysis in connection with the implementation of the Convention on the Prohibition of the Development, Production, Stockpiling and Use of Chemical Weapons and on their Destruction, entry in IMDG Code UN 3315, CHEMICAL SAMPLE, TOXIC, Class 6.1 may be used.

Chemical sample may only be transported provided prior approval has been granted by the competent authority or the Director General of the Organization for the Prohibition of Chemical Weapons.

For full details on transport of samples under above mentioned purpose refer entry UN 3315 in IMDG Code and visit

English: Participation in the Chemical Weapons...
Schedule 1:A. Toxic chemicals1) O-Alkyl (≤C10, incl. cycloalkyl) alkyl (Me, Et, n-Pr ori-Pr)-phosphonofluoridatese.g. Sarin: O-Isopropyl methylphosphonofluoridateSoman: O-Pinacolyl methylphosphonofluoridate2) O-Alkyl (≤C10, incl. cycloalkyl) N,N-dialkyl (Me, Et, n-

Pr or i-Pr) phosphoramidocyanidates

e.g. Tabun: O-Ethyl N,N-dimethyl phosphoramidocyanidate

3) O-Alkyl (H or ≤C10, incl. cycloalkyl) S-2-dialkyl (Me,

Et, n-Pr or i-Pr)-aminoethyl alkyl (Me, Et, n-Pr or i-Pr)

phosphonothiolates and corresponding alkylated or

protonated salts

e.g.VX: O-Ethyl S-2-diisopropyl-aminoethyl methyl


4) Sulfur mustards:

e.g. 2-Chloroethylchioromethylsuifide

Mustard gas: Bis(2-chloroethyl)sulfide


Sesquimustard: 1,2-Bis(2-chloroethylthio)ethane





O-Mustard: Bis(2-chloroethylthioethyl)ether

5) Lewisites:

e.g. Lewisite 1: 2-Chlorovinyldichloroarsine

Lewisite 2: Bis(2-chlorovinyl)chloroarsine

Lewisite 3: Bis(2-chlorovinyl)arsine

6) Nitrogen mustards:

e.g.HN1: Bis(2chloroethyl)ethylamine

HN2: Bis(2-chloroethyl)methylamine

HN3: Tris(2-chloroethyl)amine

7) Saxitoxin

8) Ricin

B. Precursors

9) Alkyl (Me, Et, n-Pr or i-Pr) phosphonyldifluorides

e.g. DF: Methylphosphonyldifluoride

10) O-Alkyl (H or ≤C10, incl. cycloalkyl) O-2-dialkyl (Me,

Et, n-Pr or i-Pr)-aminoethyl alkyl (Me, Et, N-Pr or i-Pr)

phosphonites and corresponding alkylated or

protonated salts

e.g.QL: O-Ethyl O-2-diisopropylaminoethyl methylphosphonite

11) Chlorosarin: O-Isopropyl methylphosphonochloridate

12) Chlorosoman: O-Pinacolyl methylphosphonochloridate

Schedule 2:A. Toxic chemicals1) Amiton: O,O-Diethyl S-[2-(diethylamino)ethyl] phosphorothiolate and corresponding alkylated orprotonated salts2) PFIB: 1,1,3,3,3-Pentafluoro-2-(trifluoromethyl)-1-propene3) BZ: 3-Quinuclidinyl benzilate*B. Precursors

4) Chemicals, except for those listed in Schedule 1, containing

a phosphorus atom to which is bonded one methyl,

ethyl or propyl (normal or iso) group but not further

carbon atoms

e.g. Methylphosphonyl dichloride

Dimethyl methylphosphonate

Exemption: Fonofos: O-Ethyl S-phenyl ethylphosphonothiolothionate

5) N,N-Dialkyl (Me, Et, n-Pr or i-Pr) phosphoramidic


6) Dialkyl (Me, Et, n-Pr or i-Pr) N,N-dialkyl (Me, Et, n-Pr

or i-Pr)-phosphoramidates

7) Arsenic trichloride

8) 2,2-Diphenyl-2-hydroxyacetic acid

9) Quinuclidin-3-ol

10) N,N-Dialkyl (Me, Et, n-Pr or i-Pr) aminoethyl-2-chlorides

and corresponding protonated salts

11) N,N-Dialkyl (Me, Et, n-Pr or i-Pr) aminoethane-2-ols

and corresponding protonated salts

Exemptions: N,N-Dimethylaminoethanol and corresponding

protonated salts

N,N-Diethylaminoethanol and corresponding

protonated salts

12) N,N-Dialkyl (Me, Et, n-Pr or i-Pr) aminoethane-2-thiols

and corresponding protonated salts

13) Thiodiglycol: Bis(2-hydroxyethyl)sulfide

14) Pinacolyl alcohol: 3,3-Dimethylbutan-2-ol

Schedule 3:A. Toxic chemicals1) Phosgene: Carbonyl dichloride2) Cyanogen chloride3) Hydrogen cyanide4) Chloropicrin: TrichloronitromethaneB. Precursors

5) Phosphorus oxychloride

6) Phosphorus trichloride

7) Phosphorus pentachloride

8) Trimethyl phosphite

9) Triethyl phosphite

10) Dimethyl phosphite

11) Diethyl phosphite

12) Sulfur monochloride

13) Sulfur dichloride

14) Thionyl chloride

15) Ethyldiethanolamine

16) Methyldiethanolamine

17) Triethanolamine