Chemical Weapons Convention/Schedules

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Schedule 1

Schedule 1 Toxic Chemicals
Description Examples and CAS numbers
O-Alkyl (<C10, incl. cycloalkyl) alkyl (Me, Et, n-Pr or i-Pr)-phosphonofluoridates Sarin (GB): O-Isopropyl methylphosphonofluoridate (107-44-8); Soman (GD): O-Pinacolyl methylphosphonofluoridate (96-64-0)
O-Alkyl (<C10, incl. cycloalkyl) N,N-dialkyl (Me, Et, n-Pr or i-Pr) phosphoramidocyanidates Tabun (GA): O-Ethyl N,N-dimethyl phosphoramidocyanidate (77-81-6)
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 VX: O-Ethyl S-2-diisopropylaminoethyl methyl phosphonothiolate (50782-69-9)
Sulfur mustards 2-Chloroethylchloromethylsulfide (2625-76-5); Mustard gas: Bis(2-chloroethyl)sulfide (505-60-2); Bis(2-chloroethylthio)methane (63869-13-6); Sesquimustard: 1,2-Bis(2-chloroethylthio)ethane (3563-36-8);1,3-Bis(2-chloroethylthio)-n-propane (63905-10-2); 1,4-Bis(2-chloroethylthio)-n-butane ;(142868-93-7);1,5-Bis(2-chloroethylthio)-n-pentane (142868-94-8);Bis(2-chloroethylthiomethyl)ether (63918-90-1);O-Mustard: Bis(2-chloroethylthioethyl)ether (63918-89-8)
Lewisites Lewisite 1: 2-Chlorovinyldichloroarsine (541-25-3);Lewisite 2: Bis(2-chlorovinyl)chloroarsine (40334-69-8);Lewisite 3: Tris(2-chlorovinyl)arsine (40334-70-1)
Nitrogen mustards HN1: Bis(2-chloroethyl)ethylamine (538-07-8); HN2: Bis(2-chloroethyl)methylamine (51-75-2); HN3: Tris(2-chloroethyl)amine (555-77-1)
Saxitoxin Saxitoxin (35523-89-8)
Ricin Ricin (9009-86-3)


Schedule 1 Precursors
Description Examples and CAS numbers
Alkyl (Me, Et, n-Pr or i-Pr) phosphonyldifluorides DF: Methylphosphonyl difluoride (676-99-3
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 QL: O-Ethyl O-2-diisopropylaminoethyl methylphosphonite (57856-11-8)
Chlorosarin O-Isopropyl methylphosphonochloridate (1445-76-7)
Chlorosoman O-Pinacolyl methylphosphonochloridate (7040-57-5)

Schedule 2

Schedule 2 Toxic Chemicals
Description Examples and CAS numbers
Amiton O,O-Diethyl S-[2-(diethylamino)ethyl] phosphorothiolate (78-53-5) and corresponding alkylated or protonated salts
PFIB 1,1,3,3,3-Pentafluoro-2-(trifluoromethyl)-1-propene (382-21-8)
BZ (chemical weapon) 3-Quinuclidinyl benzilate (*) (6581-06-2)


Schedule 2 Precursors
Description Examples and CAS numbers
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, Methylphosphonyl dichloride (676-97-1) ;Dimethyl methylphosphonate (756-79-6); exemption Fonofos: O-Ethyl S-phenyl ethylphosphonothiolothionate (944-22-9)
N,N-Dialkyl (Me, Et, n-Pr or i-Pr) phosphoramidic dihalides ,
Arsenic trichloride (7784-34-1)
2,2-Diphenyl-2-hydroxyacetic acid (76-93-7)
Quinuclidin-3-ol
N,N-Dialkyl (Me, Et, n-Pr or i-Pr) aminoethyl-2-chlorides and corresponding protonated salts (
N,N-Dialkyl (Me, Et, n-Pr or i-Pr) aminoethane-2-ols and corresponding protonated salts Exemptions: N,N-Dimethylaminoethanol (108-01-0); N,N-Diethylaminoethanol (100-37-8) and corresponding protonated salts;
N,N-Dialkyl (Me, Et, n-Pr or i-Pr) aminoethane-2-thiols and corresponding protonated salts Example
Thiodiglycol Bis(2-hydroxyethyl)sulfide (111-48-8)
Pinacolyl alcohol 3,3-Dimethylbutan-2-ol (464-07-3)
Class Example


Schedule 3

Schedule 3 Toxic Chemicals
Description Examples and CAS numbers
Phosgene Carbonyl dichloride (75-44-5)
Cyanogen chloride (506-77-4)
Chloropicrin Trichloronitromethane (76-06-2)
Hydrogen cyanide (74-90-8)


Schedule 3 Precursors
Description Examples and CAS numbers
Phosphorus oxychloride (10025-87-3)
Phosphorus trichloride (7719-12-2)
Phosphorus pentachloride (10026-13-8)
Trimethyl phosphite (121-45-9)
Triethyl phosphite (122-52-1)
Dimethyl phosphite (868-85-9)
Diethyl phosphite (762-04-9)
Sulfur monochloride (10025-67-9)
Sulfur dichloride (10545-99-0)
Thionyl chloride (7719-09-7)
Ethyldiethanolamine (139-87-7)
Methyldiethanolamine (105-59-9)
Triethanolamine (102-71-6)