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Chemical Weapons Convention Implementation Act (S.C. 1995, c. 25)

Act current to 2024-05-28 and last amended on 2019-06-21. Previous Versions

ANNEX ON CHEMICALSSchedules of Chemicals

The following Schedules list toxic chemicals and their precursors. For the purpose of implementing this Convention, these Schedules identify chemicals for the application of verification measures according to the provisions of the Verification Annex. Pursuant to Article II, subparagraph 1 (a), these Schedules do not constitute a definition of chemical weapons.

(Whenever reference is made to groups of dialkylated chemicals, followed by a list of alkyl groups in parentheses, all chemicals possible by all possible combinations of alkyl groups listed in the parentheses are considered as listed in the respective Schedule as long as they are not explicitly exempted. A chemical marked “*” on Schedule 2, part A, is subject to special thresholds for declaration and verification, as specified in Part VII of the Verification Annex.)


(CAS registry number)

  • A Toxic chemicals:

    • (1) O-Alkyl (<=C10, incl. cycloalkyl) alkyl

      (Me, Et, n-Pr or i-Pr)-phosphonofluoridates

      e.g. Sarin: O-Isopropyl methylphosphonofluoridateblank line(107-44-8)

      Soman: O-Pinacolyl methylphosphonofluoridateblank line(96-64-0)

    • (2) O-Alkyl (<=C10, incl. cycloalkyl) N,N-dialkyl

      (Me, Et, n-Pr or i-Pr) phosphoramidocyanidates

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

      phosphoramidocyanidateblank line(77-81-6)

    • (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-diisopropylaminoethyl

      methyl phosphonothiolateblank line(50782-69-9)

    • (4) Sulfur mustards:

      2-Chloroethylchloromethylsulfideblank line(2625-76-5)

      Mustard gas: Bis(2-chloroethyl)sulfideblank line(505-60-2)

      Bis(2-chloroethylthio)methaneblank line(63869-13-6)

      Sesquimustard: 1,2-Bis(2-chloroethylthio)ethaneblank line(3563-36-8)

      1,3-Bis(2-chloroethylthio)-n-propaneblank line(63905-10-2)

      1,4-Bis(2-chloroethylthio)-n-butaneblank line(142868-93-7)

      1,5-Bis(2-chloroethylthio)-n-pentaneblank line(142868-94-8)

      Bis(2-chloroethylthiomethyl)etherblank line(63918-90-1)

      O-Mustard: Bis(2-chloroethylthioethyl)etherblank line(63918-89-8)

    • (5) Lewisites:

      Lewisite 1: 2-Chlorovinyldichloroarsineblank line(541-25-3)

      Lewisite 2: Bis(2-chlorovinyl)chloroarsineblank line(40334-69-8)

      Lewisite 3: Tris(2-chlorovinyl)arsineblank line(40334-70-1)

    • (6) Nitrogen mustards:

      HN1: Bis(2-chloroethyl)ethylamineblank line(538-07-8)

      HN2: Bis(2-chloroethyl)methylamineblank line(51-75-2)

      HN3: Tris(2-chloroethyl)amineblank line(555-77-1)

    • (7) Saxitoxinblank line(35523-89-8)

    • (8) Ricinblank line(9009-86-3)

  • B Precursors:

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

      e.g. DF: Methylphosphonyldifluorideblank line(676-99-3)

    • (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

      methylphosphoniteblank line(57856-11-8)

    • (11) Chlorosarin: O-Isopropyl methylphosphonochlo-

      ridateblank line(1445-76-7)

    • (12) Chlorosoman: O-Pinacolyl methylphosphonochlo-

      ridateblank line(7040-57-5)


  • A Toxic chemicals:

    • (1) Amiton: O,O-Diethyl S-[2-(diethylamino)ethyl]

      phosphorothiolate and corresponding alkylated

      or protonated saltsblank line(78-53-5)

    • (2) PFIB: 1,1,3,3,3-Pentafluoro-2-(trifluoromethyl)-1-

      propeneblank line(382-21-8)

    • (3) BZ: 3-Quinuclidinyl benzilate (*)blank line(6581-06-2)

  • 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 dichlorideblank line(676-97-1)

      Dimethyl methylphosphonateblank line(756-79-6)

      Exemption: Fonofos: O-Ethyl S-phenyl

      ethylphosphonothiolothionateblank line(944-22-9)

    • (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 trichlorideblank line(7784-34-1)

    • (8) 2,2-Diphenyl-2-hydroxyacetic acid blank line(76-93-7)

    • (9) Quinuclidin-3-olblank line(1619-34-7)

    • (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-Dimethylaminoethanolblank line(108-01-0)

      and corresponding protonated salts

      N,N-Diethylaminoethanolblank line(100-37-8)

      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)sulfideblank line(111-48-8)

    • (14) Pinacolyl alcohol: 3,3-Dimethylbutan-2-olblank line(464-07-3)


  • A Toxic chemicals:

    • (1) Phosgene: Carbonyl dichlorideblank line(75-44-5)

    • (2) Cyanogen chlorideblank line(506-77-4)

    • (3) Hydrogen cyanideblank line(74-90-8)

    • (4) Chloropicrin: Trichloronitromethaneblank line(76-06-2)

  • B Precursors:

    • (5) Phosphorus oxychlorideblank line(10025-87-3)

    • (6) Phosphorus trichlorideblank line(7719-12-2)

    • (7) Phosphorus pentachlorideblank line(10026-13-8)

    • (8) Trimethyl phosphiteblank line(121-45-9)

    • (9) Triethyl phosphiteblank line(122-52-1)

    • (10) Dimethyl phosphiteblank line(868-85-9)

    • (11) Diethyl phosphiteblank line(762-04-9)

    • (12) Sulfur monochlorideblank line(10025-67-9)

    • (13) Sulfur dichlorideblank line(10545-99-0)

    • (14) Thionyl chlorideblank line(7719-09-7)

    • (15) Ethyldiethanolamineblank line(139-87-7)

    • (16) Methyldiethanolamineblank line(105-59-9)

    • (17) Triethanolamineblank line(102-71-6)


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