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Central Narcotics Bureau (CNB)
Scheduled substances

Circular 9 - dated 29 November 2024

29 November 2024

Circular Reference No.: CNB/227A

All Importers, Exporters, Traders, Freight Forwarders, Declaring Agents, Cargo Agents, and Carriers of controlled substances listed in the Third Schedule of the Misuse of Drugs Act (MDA) 1973.

Scheduled substances controlled by Director, Central Narcotics Bureau (CNB)

  1. CNB is the approving authority for controlled substances listed in the Third Schedule of the MDA 1973 since 5 September 1999. A circular dated 31 August 1999, which includes a list of the controlled substances, had been previously circulated to all traders. For ease of reference, the updated controlled substances list with effect from 1 December 2024 is enclosed at ANNEX A.

  2. With effect from 1 December 2024, the following substances have been included in Part 1 of the Third Schedule of the MDA 1973:

    1. 2-Methyl-3-phenyl-2-oxiranecarboxylic acid also known as P-2-P methyl glycidic acid or BMK glycidic acid;

    2. Methyl 2-methyl-3-phenyl-2-oxiranecarboxylate also known as P-2-P methyl glycidic acid, methyl ester;

    3. Ethyl 2-methyl-3-phenyl-2-oxiranecarboxylate also known as P-2-P methyl glycidic acid, ethyl ester;

    4. Propyl 2-methyl-3-phenyl-2-oxiranecarboxylate also known as P-2-P methyl glycidic acid, propyl ester;

    5. Isopropyl 2-methyl-3-phenyl-2-oxiranecarboxylate also known as P-2-P methyl glycidic acid, isopropyl ester;

    6. Butyl 2-methyl-3-phenyl-2-oxiranecarboxylate also known as P-2-P methyl glycidic acid, butyl ester;

    7. 2-Methylpropyl 2-methyl-3-phenyl-2-oxiranecarboxylate also known as P-2-P methyl glycidic acid, isobutyl ester or isobutyl 2-methyl-3-phenyl-2-oxiranecarboxylate;

    8. Butan-2-yl 2-methyl-3-phenyl-2-oxiranecarboxylate also known as P-2-P methyl glycidic acid, sec-butyl ester or sec-butyl 2-methyl-3-phenyl-2-oxiranecarboxylate;

    9. tert-Butyl 2-methyl-3-phenyl-2-oxiranecarboxylate also known as P-2-P methyl glycidic acid, tert-butyl ester;

    10. Piperidin-4-one also known as 4-Piperidone; and

    11. tert-Butyl 4-oxo-1-piperidinecarboxylate also known as 1-Boc-4-piperidone.

  3. The naming for 2 existing controlled substances in Part 1 of the Third Schedule of the MDA 1973 has also been edited as follows (changes are underlined):

    1. Butan-2-yl 3-(1,3-benzodioxol-5-yl)-2-methyl-2-oxiranecarboxylate also known as 3,4-MDP-2-P methyl glycidic acid, sec-butyl ester or sec-butyl 3-(1,3-benzodioxol-5-yl)-2-methyl-2-oxiranecarboxylate; and

    2. 2-Methylpropyl 3-(1,3-benzodioxol-5-yl)-2-methyl-2-oxiranecarboxylate also known as 3,4-MDP-2-P methyl glycidic acid, isobutyl ester or isobutyl 3-(1,3-benzodioxol-5-yl)-2-methyl-2-oxiranecarboxylate.

  4. With this inclusion, the manufacture, supply, possession, import or export of the newly added substances to the Third Schedule of the MDA 1973 as stated in para 2 above, for the purpose of manufacturing of a controlled drug, would contravene Section 10A of the MDA 1973. Any person convicted of this offence shall be punished with imprisonment not exceeding 20 years or with a fine not exceeding S$200,000 or with both. Persons found to have imported or exported this substance without a permit from CNB can be prosecuted under Misuse of Drugs (Controlled Equipment, Material and Substances) Regulations and punishable with imprisonment not exceeding 3 years or with a fine not exceeding S$10,000 or with both.

  5. With effect from 1 December 2024, traders intending to import, export or tranship the newly added substances to the Third Schedule of the MDA 1973 as stated in para 2 above, shall make a declaration of its intent to do so to CNB, 14 days before the effective date of import, export or transshipment.

  6. CNB is the approving authority for the import, export and transhipment of the newly added substances to the Third Schedule of the MDA 1973 stated in para 2 above. They are currently declared under HS codes as 29189900 and 29333990, depending on the product descriptions.

  7. With effect from 5 November 2015, in addition to HS codes, traders and declaring agents are required to indicate “CNB” as the approving authority under the Customs Procedure Code (CPC) field in your permit application submitted in TradeNet®.

  8. The new requirement for CPC is introduced to facilitate the processing of your import/export/transhipment permit applications submitted for products that contain CNB controlled substances but are not classified under CNB controlled HS codes.

  9. If you require further clarification, please contact Mr. Xavier Lek, SOC Precursor Control Unit, Central Narcotics Bureau at 65573229 or 63251184 or e-mail CNB_Chemical_Enquiry@cnb.gov.sg.

  10. This circular supersedes the CNB contact information found in CNB Circular 1 dated 26 May 2008, CNB Circular 2 dated 1 April 2001, CNB Circular 3 dated 27 June 2014, CNB Circular 4 dated 2 September 2014, CNB Circular 5 dated 5 November 2015, CNB Circular 6 dated 4 October 2017, CNB Circular 7 dated 1 June 2022 and Circular 8 dated 29 May 2024.

  11. Thank you for your kind cooperation.

CENTRAL NARCOTICS BUREAU
29 November 2024

ANNEX A

Controlled Substances as specified under the Third Schedule of the Misuse of Drugs Act (MDA) 1973

S/N

CONTROLLED SUBSTANCES

HS CODES

1

Toluole

27072000

2

Potassium permanganate

28416100

3

Toluene also known as
Methylbenzene or Phenylmethane

29023000

4

Diethyl Ether;
Ethyl Ether or Ether or Ethyl oxide or
Diethyl oxide or Ethoxyethane or 1,1’-Oxybisethane

29091100

5

Acetone;
2-Propanone or Dimethyl ketone

29141100

6

2-Butanone;
Methyl Ethyl Ketone

29141200

7

Phenylacetone;
Phenylpropan-2-one or 1-phenyl-2-propanone

29143100

8

Acetic Anhydride; Acetic oxide

29152400

9

Phenylacetic acid and its salts; Benzeneacetic acid or α-Toluic acid

29163400

10

Anthranilic acid and its salts;
o-Aminobenzoic acid

29224300

11

2-Acetamidobenzoic acid;
N-acetylanthranilic acid or N-Acetyl-o-aminobenzoic acid

29242300

12

Isosafrole;
1,2-(Methylenedioxy)-4-propenylbenzene

29329100

13

1-(1,3-Benzodioxol-5-yl)propan-2-one;
3, 4-methylenedioxyphenyl-2-propanone

29329200

14

Piperonal;
3,4-(Methylenedioxy)benzaldehyde or Piperonylaldehyde

29329300

15

Safrole;
4-Allyl-1,2-methylenedioxybenzene

29329400

16

Piperidine and its salts; Hexahydro pyridine

29333200

17

Ephedrine and its salts; β-Hydroxy-N-methylamphetamine

29394100

18

Pseudoephedrine (INN) and its salts; β -Hydroxy-N-methylamphetamine

29394200

19

Ergometrine (INN) and its salts; Ergonovine or Ergobasine or [8β(S)]-9,10-Didehydro-N-(2-hydroxy-1-methylethyl)-6- methyl-6-methylergoline-8-carboxamide

29396100

20

Ergotamine (INN) and its salts; 12’-Hydroxy-2’-methyl-5’α-(phenymethyl)ergotaman- 3’,6’,18’-trinone

29396200

21

Lysergic acid and its salts; 9,10-Didehydro-6-methylergoline-8β-carboxylic acid

29396300

22

Norephedrine and its salts;
(-)-norephedrine [1R,2S] or (+)-norephedrine [1S,2R]

29394400

23

Phenylpropanolamine (PPA) (dl-norephedrine) (-)-norephedrine [1R,2S] and (+)-norephedrine [1S,2R]

29394400

24

Norpseudoephedrine and its salt; threo-1-Phenyl-1-hydroxy-2-aminopropane or (R,R)- α-(1-Aminoethyl)benzenemethanol

29394300

25

Medicaments containing ephedrine (also known as β- Hydroxy- N-methylamphetamine) not put up for retail sale or not in measured doses

30034100

26

Medicaments containing pseudoephedrine (also known as β-Hydroxy-N-methylamphetamine) not put up for retail sale or not in measured doses

30034200

27

Medicaments containing norephedrine (also known as Phenylpropanolamine (dl-norephedrine) not put up for retail sale or not in measured doses

30034300

28

Medicaments containing ephedrine (also known as β- Hydroxy-N-methylamphetamine) put up for retail sale or measured doses

30044100

29

Medicaments containing pseudoephedrine (also known as β-Hydroxy-N-methylamphetamine) put up for retail sale or measured doses

30044200

30

Medicaments containing norephedrine (also known as Phenylpropanolamine (dl-norephedrine) put up for retail sale or measured doses

30044300

31

Alpha-Phenylacetoacetonitrile, also known as APAAN, and its optical isomers

29264000

32

4-anilino-N-phenethylpiperidine (ANPP)

29333990*

33

N-phenethyl-4-piperidone (NPP)

29333700*

34

Hydrochloric Acid; Hydrogen Chloride

28061000

35

Sulphuric acid; Oleum ≥ 80% concentration

28070010


Sulphuric acid; Oleum < 80% concentration

28070090

36

Sassafras Oil

33012990*

37

Methyl 3-(1,3-benzodioxol-5-yl)-2-methyl-2-oxiranecarboxylate also known as 3,4-MDP-2-P methyl glycidate or PMK glycidate

29329900*

38

3-(1,3-Benzodioxol-5-yl)-2-methyl-2-oxiranecarboxylic acid also known as 3,4-MDP-2-P methyl glycidic acid or PMK glycidic acid

29329900*

39

Alpha-phenylacetoacetamide (APAA)

29242990*

40

Methyl alpha-phenyl acetoacetate (also known as MAPA)

29183000*

41

N-Phenylpiperidin-4-amine (also known as 4-anilinopiperidine, N- phenyl-4-piperidinamine or 4-AP)

29333990*

42

tert-Butyl 4-(phenylamino)piperidine-1-carboxylate (also known as 4-anilino-1-boc-piperidine, 1-boc-4-anilinopiperidine, tert- butoxycarbonyl-4-anilinopiperidine, t-boc-4-anilinopiperidine,
t-boc-4-AP, 1-boc-4-AP or boc-4-AP)

29333990*

43

N-phenyl-N-(piperidin-4-yl)propionamide (also known as norfentanyl)

29333990*

44

Ethyl 3-(1,3-benzodioxol-5-yl)-2-methyl-2-oxiranecarboxylate also known as 3,4-MDP-2-P methyl glycidic acid, ethyl ester

29333990*

45

Propyl 3-(1,3-benzodioxol-5-yl)-2-methyl-2-oxiranecarboxylate also known as 3,4-MDP-2-P methyl glycidic acid, propyl ester

29333990*

46

Isopropyl 3-(1,3-benzodioxol-5-yl)-2-methyl-2-oxiranecarboxylate also known as 3,4-MDP-2-P methyl glycidic acid, isopropyl ester

29333990*

47

Butyl 3-(1,3-benzodioxol-5-yl)-2-methyl-2-oxiranecarboxylate also known as 3,4-MDP-2-P methyl glycidic acid, butyl ester

29333990*

48

2-Methylpropyl 3-(1,3-benzodioxol-5-yl)-2-methyl-2-oxiranecarboxylate also known as 3,4-MDP-2-P methyl glycidic acid, isobutyl ester or isobutyl 3-(1,3-benzodioxol-5-yl)-2-methyl-2-oxiranecarboxylate

29333990*

49

Butan-2-yl 3-(1,3-benzodioxol-5-yl)-2-methyl-2-oxiranecarboxylate also known as 3,4-MDP-2-P methyl glycidic acid, sec-butyl ester or sec-butyl 3-(1,3-benzodioxol-5-yl)-2-methyl-2-oxiranecarboxylate

29333990*

50

tert-Butyl 3-(1,3-benzodioxol-5-yl)-2-methyl-2-oxiranecarboxylate also known as 3,4-MDP-2-P methyl glycidic acid, tert-butyl ester

29333990*

51

2-Methyl-3-phenyl-2-oxiranecarboxylic acid also known as P-2-P methyl glycidic acid or BMK glycidic acid

29189900*

52

Methyl 2-methyl-3-phenyl-2-oxiranecarboxylate also known as P-2-P methyl glycidic acid, methyl ester

29189900*

53

Ethyl 2-methyl-3-phenyl-2-oxiranecarboxylate also known as P-2-P methyl glycidic acid, ethyl ester

29189900*

54

Propyl 2-methyl-3-phenyl-2-oxiranecarboxylate also known as P-2-P methyl glycidic acid, propyl ester

29189900*

55

Isopropyl 2-methyl-3-phenyl-2-oxiranecarboxylate also known as P-2-P methyl glycidic acid, isopropyl ester

29189900*

56

Butyl 2-methyl-3-phenyl-2-oxiranecarboxylate also known as P-2-P methyl glycidic acid, butyl ester

29189900*

57

2-Methylpropyl 2-methyl-3-phenyl-2-oxiranecarboxylate also known as P-2-P methyl glycidic acid, isobutyl ester or isobutyl 2-methyl-3-phenyl-2-oxiranecarboxylate

29189900*

58

Butan-2-yl 2-methyl-3-phenyl-2-oxiranecarboxylate also known as P-2-P methyl glycidic acid, sec-butyl ester or sec-butyl 2-methyl-3-phenyl-2-oxiranecarboxylate

29189900*

59

tert-Butyl 2-methyl-3-phenyl-2-oxiranecarboxylate also known as P-2-P methyl glycidic acid, tert-butyl ester

29189900*

60

Piperidin-4-one also known as 4-Piperidone

29333990*

61

tert-Butyl 4-oxo-1-piperidinecarboxylate also known as 1-Boc-4-piperidone

29333990*

62

Poppy Seeds

12079100

*Non-CNB controlled HS codes. To indicate “CNB” as the approving authority under the Customs Procedure Code (CPC) field in your permit application submitted in TradeNet.

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