Singapore's NEA Proposes Adding 26 Chemicals to List of Hazardous Chemicals Requiring an HS License/Permit

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From June 13 to July 4, 2022, Singapore's National Environment Agency (NEA) published a public consultation on the proposal to control 26 chemicals as hazardous chemicals because some of the 26 chemicals are highly toxic, polluting, and/or generate intractable waste that is difficult to manage and safely dispose of. During the consultation period, 52 feedbacks were received and suggestions on regulatory details were also collected. Below we have prepared a summary of the HS license/permit application and requirements.

The 26 chemicals are all listed in the Chemical Weapons Convention (CWC). Companies must consult relevant departments on the control of these substances.

The NEA intends to publish these regulatory changes by December 2022. These changes will be followed by a six-month transitional period before coming into effect by June 2023. If the Proposed Control is successfully adopted, enterprises must make amendments to their existing HS license/permit or apply for an HS license/permit from January 1, 2023. Moreover, enterprises must obtain a valid HS license/permit to perform specified activities by June 2023.

Companies performing activities involving any of these 26 chemicals shall obtain HS license/permit regardless of quantity. If companies have any questions about the exemption purity of these substances, they can provide relevant information to NEA by November 10.

26 Chemicals that NEA Proposes Regulating as Hazardous Substances
S/N	Chemical Name	CAS Registry No.
1	O-Alkyl(≤C10, including cycloalkyl) alkyl (Me, Et, n-Pr or i-Pr)-phosphonofluoridates e.g. Sarin: O-Isopropyl methylphosphonofluoridate Soman: O-Pinacolyl methylphosphonofluoridate	107-44-8 96-64-0
2	O-Alkyl (H or ≤C10, including 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 phosphonothiolate	50782-69-9
3	Lewisites: Lewisite 1: 2-Chlorovinyldichloroarsine Lewisite 2: Bis(2-chlorovinyl)chloroarsine Lewisite 3: Tris(2-chlorovinyl)arsine	541-25-3 40334-69-8 40334-70-1
4	Nitrogen mustards: HN1: Bis(2-chloroethyl)ethylamine HN2: Bis(2-chloroethyl)methylamine HN3: Tris(2-chloroethyl)amine	538-07-8 51-75-2 555-77-1
5	Saxitoxin	35523-89-8
6	Ricin	9009-86-3
7	Alkyl (Me, Et, n-Pr or i-Pr) phosphonyl difluorides e.g. DF: Methylphosphonyldifluoride	676-99-3
8	O-Alkyl (H or ≤C10, including 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	57856-11-8
9	Chlorosarin: O-Isopropyl methylphosphonochloridate	1445-76-7
10	Chlorosoman: O-Pinacolyl methylphosphonochloridate	7040-57-5
11	Р-alkyl (H or ≤C10, incl. cycloalkyl) N-(1-(dialkyl(≤C10, incl. cycloalkyl)amino))alkylidene(H or ≤C10, incl. cycloalkyl) phosphonamidic fluorides and corresponding alkylated or protonated salts e.g. N-(1-(di-n-decylamino)-n-decylidene)-P-decylphosphonamidic fluoride Methyl-(1-(diethylamino)ethylidene) phosphonamidofluoridate	2387495-99-8 2387496-12-8
12	O-alkyl (H or ≤C10, incl. cycloalkyl) N-(1-(dialkyl(≤C10, incl. cycloalkyl)amino))alkylidene(H or ≤C10, incl. cycloalkyl) phosphoramidofluoridates and corresponding alkylated or protonated salts e.g. O-n-Decyl N-(1-(di-n-decylamino)-ndecylidene) phosphoramidofluoridate Methyl (1-(diethylamino)ethylidene) phosphoramidofluoridate Ethyl (1-(diethylamino)ethylidene) phosphoramidofluoridate	2387496-00-4 2387496-04-8 2387496-06-0
13	Methyl-(bis(diethylamino)methylene) phosphonamidofluoridate	2387496-14-0
14	Carbamates (quaternaries and bisquaternaries of dimethylcarbamoyloxypyridines) Quaternaries of dimethylcarbamoyloxypyridines: 1-[N,N-dialkyl(≤C10)-N-(n-(hydroxyl, cyano, acetoxy)alkyl(≤C10)) ammonio]-n-[N-(3-dimethylcarbamoxy-α-picolinyl)-N,N-dialkyl(≤C10) ammonio]decane dibromide (n=1-8) e.g. 1-[N,N-dimethyl-N-(2-hydroxy)ethylammonio]-10 [N- (3-dimethylcarbamoxy-α-picolinyl)-N,N dimethylammonio]decane dibromide Bisquaternaries of dimethylcarbamoyloxypyridines: 1,n-Bis[N-(3-dimethylcarbamoxy-α-picolyl)-N,N-dialkyl(≤C10) ammonio]-alkane-(2,(n-1)-dione) dibromide (n=2-12) e.g. 1,10-Bis[N-(3-dimethylcarbamoxy-α picolyl)-N-ethyl-N-methylammonio] decane-2,9-dione dibromide	77104-62-2 77104-00-8
15	PFIB: 1,1,3,3,3-Pentafluoro-2-(trifluoromethyl) -1-propene	382-21-8
16	BZ: 3-Quinuclidinyl benzilate	6581-06-2
17	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	676-97-1 756-79-6 944-22-9
18	Dialkyl (Me, Et, n-Pr or i-Pr) N,N-dialkyl (Me, Et, n-Pr or i-Pr)-phosphoramidates	/
19	2,2-Diphenyl-2-hydroxyacetic acid: Benzilic acid	76-93-7
20	Quinuclidin-3-ol	1619-34-7
21	N,N-Dialkyl (Me,Et,n-Pr or i-Pr) aminoethyl- 2-chlorides and corresponding protonated salts	/
22	N,N-Dialkyl (Me, Et, n-Pr or i-Pr) aminoethane-2-thiols and corresponding protonated salts	/
23	Thiodiglycol: Bis(2-hydroxyethyl)sulfide	111-48-8
24	Diethyl phosphite	762-04-9
25	Thionyl chloride	7719-09-7
26	Triethanolamine	102-71-6

As to the HS license/permit, enterprises shall make applications based on their activities.

	HS license	HS permit
Entity/Applicants	Any person who imports, exports, manufactures, sells, transport, stores, and/or uses the regulated chemicals under the EPMA	Any person who purchases, stores, and/or uses any hazardous chemicals under the EPMA
Time	7 working days (complete and accurate submission of all documents)	7 working days (complete and accurate submission of all documents)
Types	Type 1: Hazardous Substances License; Type 2: Temporary Hazardous Substances License	HS permit
Validity	One-year validity for Type 1; Three months for Type 2.	One-year validity

As to the exemption situations, NEA gives a brief introduction. If these 26 chemicals are present in products or mixtures at low concentrations or as impurities, they are exempted from the proposed regulatory control. Moreover, companies shall submit supporting documents such as SDS and analytical reports to NEA for verification.

There are also another nine chemicals that NEA is currently co-regulating with the Singapore Customs, which are:

Amiton,
Arsenic trichloride,
Phosgene,
Cyanogen chloride,
Hydrogen Cyanide,
Chloropicrin,
Phosphorus oxychloride,
Phosphorus trichloride, and
Phosphorus pentachloride.

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