The UK has expanded its licensing policy on which chemicals fall under Schedule 1 of the Chemical Weapons Convention (CWC). In particular, the regime has been expanded to include chemicals that are not specifically listed in Schedule 1 under a particular CAS number, but share a chemical similarity with the ones that are. The UK considers the molecular structure of a chemical in order to determine whether it is covered by Schedule 1 and therefore isotopically labelled analogues, stereoisomers (both optical and geometric), and corresponding salts are licensable.
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Schedule 1
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CAS registry number |
Isotopically labelled analogues |
Corresponding salts |
Stereoisomers |
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(1) |
O-Alkyl (<C10, incl. cycloalkyl) alkyl (Me, Et, n-Pr or i-Pr)-phosphonofluoridates |
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X |
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X |
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e.g. Sarin: O-Isopropyl methylphosphonofluoridate Soman: O-Pinacolyl merthylphosponofluoridate |
(107-44-8) (96-64-0) |
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(2) |
O-Alkyl (<C10, incl. cycloalkyl) N, N-dialkyl (Me, Et, n-Pr or i-Pr) phosphoramidocyanidates |
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X |
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X |
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e.g. Tabun: O-Ethyl N, N-dimethyl phosphoramidocyanidate |
(77-81-6) |
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(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 |
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X |
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X |
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e.g. VX: O-Ethyl S-2-diisopropylaminoethyl methyl phosphonothiolate |
(50782-69-9) |
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(4) |
Sulfur mustards: |
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X |
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2-Chloroethylchloromethylsulfide Mustard gas: Bis (2-chloroethyl) sulfide Bis (2-chloroethylthio)methane Sesquimustard: 1,2-Bis(2-chloroethylthio)ethane 1,3-Bis(2-chloroethylthio)-n-propane 1,4-Bis(2-chloroethylthio)-n-butane 1,5-Bis(2-chloroethylthio)-n-pentane Bis (2-chloroethylthiomethyl)ether O-Mustard: Bis(2-chloroethylthioethyl)ether |
(2625-76-5)
(505-60-2) (63869-13-6)
(3563-36-8) (63905-10-2) (142868-93-7) (142868-94-8) (63918-90-1)
(63918-89-8) |
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(5) |
Lewisites: |
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X |
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X |
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Lewisite 1: 2-Chlorovinyldichloroarsine Lewisite 2: Bis(2-chlorovunyl)chloroarsine Lewisite 3: Tris(2- chlorovinyl)arsine |
(541-25-3) (40334-69-8) (40334-70-1) |
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(6) |
Nitrogen mustards: |
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X |
X |
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HN1: Bis(2-chloroethyl)ethylamine HN2: Bis(2-chloroethyl)methylamine HN3: Tris(2-chloroethyl)amine |
(538-07-8) (51-75-2) (555-77-1) |
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(7) |
Saxitoxin |
(35523-89-8) |
X |
X |
X |
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(8) |
Ricin |
(9009-86-3) |
X |
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(9) |
Alkyl (Me, Et, n-Pr or i-Pr) phosphonyldifluoride |
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X |
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e.g. DF: Methylphosphonyldifluoride |
(676-99-3) |
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(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 |
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X |
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e.g. QL: O-Ethyl O-2-diisopropylaminoethy methylphosphonite |
(57856-11-8) |
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(11) |
Chlorosarin: O-Isopropyl methylphosphonochloridate |
(1445-76-7) |
X |
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X |
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(12) |
Chlorosoman: O-Pinacolyl methylphosphonochloridate |
(7040-57-5) |
X |
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X |
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Schedule 2
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CAS registry number |
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(1) |
Amiton: O, O-Diethyl S-[2-(diethylamino)ethyl] phosphorothiolate and corresponding alkylated or protonated salts |
(78-53-5) |
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(2) |
PFIB: 1,1,3,3,3-Pentafluoro-2-(trifluoromethyl)-1-propene |
(382-21-8) |
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(3) |
BZ: 3-Quinuclidinyl benzilate (*) |
(6581-06-2) |
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(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, |
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e.g. Methylphosphonyl dichloride Dimethyl methylphosphonate |
(676-97-1) (756-79-6) |
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Exemption: Fonofos: O-Ethyl S-phenyl ethylphosphonothiolothionate |
(944-22-9) |
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(5) |
N,N-Dialkyl (Me, Et, n-Pr or i-Pr) phosphoramidic dihalides |
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(6) |
Dialkyl (Me, Et, n-Pr or i-Pr) N,N-dialkyl (Me, Et, n-Pr or i-Pr)-phosphoramidates |
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(7) |
Arsenic trichloride |
(7784-34-1) |
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(8) |
2,2-Diphenyl-2-hydroxyacetic acid |
(76-93-7) |
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(9) |
Quinuclidin-3-ol |
(1619-34-7) |
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(10) |
N,N-Dialkyl (Me, Et, n-Pr or i-Pr) aminoethyl-2-chlorides and corresponding protonated salts |
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(11) |
N,N-Dialkyl (Me, Et, n-Pr or i-Pr) aminoethane-2-ols and corresponding protonated salts |
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Exemptions: N,N-Dimethylaminoethanol and corresponding protonated salts N,N-Diethylaminoethanol and corresponding protonated salts |
(108-01-0) (100-37-8) |
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(12) |
N,N-Dialkyl (Me, Et, n-Pr or i-Pr) aminoethane-2-thiols and corresponding protonated salts |
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(13) |
Thiodiglycol: Bis(2-hydroxyethyl) sulphide |
(111-48-8) |
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(14) |
Pinacolyl alcohol: 3,3-Dimethylbutan-2-ol |
(464-07-3) |
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Schedule 3
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CAS registry number |
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(1) |
Phosgene: Carbonyl dichloride |
(75-44-5) |
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(2) |
Cyanogen chloride |
(506-77-4) |
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(3) |
Hydrogen cyanide |
(74-90-8) |
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(4) |
Chloropicrin: Trichloronitromethane |
(76-06-2) |
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(5) |
Phosphorus oxychloride |
(10025-87-3) |
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(6) |
Phosphorus trichloride |
(7719-12-2) |
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(7) |
Phosphorus pentachloride |
(10026-13-8) |
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(8) |
Trimethyl phosphite |
(121-45-9) |
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(9) |
Triethyl phosphite |
(122-52-1) |
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(10) |
Dimethyl phosphite |
(868-85-9) |
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(11) |
Diethyl phosphite |
(762-04-9) |
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(12) |
Sulfur monochloride |
(10025-67-9) |
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(13) |
Sulfur dichloride |
(10545-99-0) |
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(14) |
Thionyl chloride |
(7719-09-7) |
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(15) |
Ethyldiethanolamine |
(139-87-7) |
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(16) |
Methyldiethanolamine |
(105-59-9) |
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(17) |
Triethanolamine |
(102-71-6) |
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