On January 31, 2025, Thailand published a notification in the Royal Government Gazette announcing the addition of 56 new substances (entries 1613–1668) to its List of Prohibited Ingredients in Cosmetics. These changes, which came into effect on February 1, 2025, align Thailand’s cosmetic regulations with the latest updates to the ASEAN Cosmetics Directive (ACD) adopted during the previous ASEAN Cosmetic Committee Meetings.
To ensure a smooth transition, a 180-day grace period has been granted to cosmetic businesses that have already manufactured, imported, or sold products containing the newly prohibited ingredients before the effective date of the announcement.
Below are the details of the 56 prohibited ingredients:
Ref No. | Newly Included Prohibited Ingredients | CAS No. |
1613 | Octamethylcyclotetrasiloxane; D4 | 556-67-2 |
1614 | Sodium perborate [1]; Sodium peroxometaborate; sodium peroxoborate [2] | 15120-21-5 [1] 7632-04-4 [2] 10332-33-9 [2] |
1615 | Perboric acid (H3BO2(O2)), monosodium salt trihydrate [1]; Perboric acid, sodium salt, tetrahydrate [2]; Perboric acid (HBO(O2)), sodium salt, tetrahydrate sodium peroxoborate hexahydrate [3] | 13517-20-9 [1] 37244-98-7 [2] 10486-00-7 [3] |
1616 | Perboric acid, sodium salt [1]; Perboric acid, sodium salt, monohydrate [2]; Perboric acid (HBO(O2)), sodium salt, monohydrate [3] | 11138-47-9 [1] 12040-72-1 [2] 10332-33-9 [3] |
1617 | Nickel diformate [1]; Formic acid, nickel salt [2]; Formic acid, copper nickel salt [3] | 3349-06-2 [1] 15843-02-4 [2] 68134-59-8 [3] |
1618 | Nickel barium titanium primrose priderite; C.I. Pigment Yellow 157; C.I. 77900 | 68610-24-2 |
1619 | Nickel dichlorate [1]; Nickel dibromate [2]; Ethyl hydrogen sulfate, nickel(II) salt [3] | 67952-43-6 [1] 14550-87-9 [2] 71720-48-4 [3] |
1620 | Trisodium nitrilotriacetate | 5064-31-3 |
1621 | Cyclohexylamine | 108-91-8 |
1622 | Cobalt | 7440-48-4 |
1623 | Metaldehyde (ISO); 2,4,6,8-tetramethyl- 1,3,5,7- tetraoxacyclooctane | 108-62-3 |
1624 | Methylmercuric chloride | 115-09-3 |
1625 | Benzo[rst]pentaphene | 189-55-9 |
1626 | Dibenzo[b,def]chrysene; dibenzo[a,h]pyrene | 189-64-0 |
1627 | Ethanol, 2,2'-iminobis-, N- (C13-15-branched and linear alkyl) derivs. | 97925-95-6 |
1628 | Cyflumetofen (ISO); 2-methoxyethyl (RS)-2- (4-tert-butylphenyl)-2-cyano-3-oxo-3-(α,α,α-trifluoro- otolyl)propionate | 400882-07-7 |
1629 | Diisohexyl phthalate | 71850-09-4 |
1630 | halosulfuron-methyl (ISO); methyl 3-chloro-5-{[(4,6- dimethoxypyrimidin-2-yl) carbamoyl] sulfamoyl}-1- methyl1H-pyrazole-4- carboxylate | 100784-20-1 |
1631 | 2-methylimidazole | 693-98-1 |
1632 | Metaflumizone (ISO); (EZ)-2'-[2-(4-cyanophenyl)-1-(α,α,α - trifluoro-m- tolyl)ethylidene]-[4-(trifluoromethoxy)phenyl] carbanilohydrazide [E-isomer ≥ 90 %, Z-isomer ≤ 10 % relative content]; [1] (E)-2'-[2-(4-cyanophenyl)- 1-(α,α,α - trifluoro-m-tolyl) ethylidene]-[4-(trifluoromethoxy)phenyl] carbanilohydrazide [2] | 139968-49-3 [1] 852403-68-0 [2] |
1633 | Dibutylbis(pentane-2,4- dionato-O,O’)tin | 22673-19-4 |
1634 | Silicon carbide fibres (with diameter < 3 µm, length > 5 µm and aspect ratio ≥ 3:1) | 409-21-2; 308076-74-6 |
1635 | Tris(2-methoxyethoxy) vinylsilane; 6-(2-methoxyethoxy)- 6- vinyl-2,5,7,10-tetraoxa-6-silaundecane | 1067-53-4 |
1636 | Dioctyltin dilaurate; [1] Stannane, dioctyl-, bis (coco acyloxy) derivs. [2] | 3648-18-8 [1] 91648-39-4 [2] |
1637 | Dibenzo[def,p]chrysene; dibenzo[a,l]pyrene | 191-30-0 |
1638 | Ipconazole (ISO); (1RS,2SR,5RS;1RS,2SR,5SR)-2-(4- chlorobenzyl)-5-isopropyl-1- (1H-1,2,4-triazol-1-ylmethyl) cyclopentanol | 125225-28-7/ 115850-69-6/ 115937-89-8 |
1639 | Bis(2-(2-methoxyethoxy)ethyl)ether; tetraglyme | 143-24-8 |
1640 | Paclobutrazol (ISO); (2RS,3RS)-1-(4-chlorophenyl)-4,4-dimethyl- 2-(1H-1,2,4-triazol-1- yl)pentan-3-ol | 76738-62-0 |
1641 | 2,2-bis(bromomethyl) propane-1,3-diol | 3296-90-0 |
1642 | 2-(4-tert-butylbenzyl) propionaldehyde | 80-54-6 |
1643 | Diisooctyl phthalate | 27554-26-3 |
1644 | 2-methoxyethyl acrylate | 3121-61-7 |
1645 | Flurochloridone (ISO); 3-chloro-4-(chloromethyl)-1-[3- (trifluoromethyl)phenyl]pyrrolidin-2-one | 61213-25-0 |
1646 | 3-(difluoromethyl)-1- methyl-N-(3',4',5'-trifluorobiphenyl-2-yl) pyrazole-4-carboxamide; fluxapyroxad | 907204-31-3 |
1647 | N-(hydroxymethyl)acrylamide; methylolacrylamide; [NMA] | 924-42-5 |
1648 | 5-fluoro-1,3-dimethyl-N-[2-(4- methylpentan-2-yl) phenyl]-1H-pyrazole- 4-carboxamide; 2'- [(RS)-1,3-dimethylbutyl]-5-fluoro-1,3-dimethylpyrazole-4-carboxanilide; penflufen | 494793-67-8 |
1649 | Iprovalicarb (ISO); isopropyl [(2S)-3- methyl-1-{[1-(4- methylphenyl)ethyl] amino}-1-oxobutan-2- yl]carbamate | 140923-17-7 |
1650 | Dichlorodioctylstannane | 3542-36-7 |
1651 | Mesotrione (ISO); 2-[4-(methylsulfonyl)- 2-nitrobenzoyl]-1,3- cyclohexanedione | 104206-82-8 |
1652 | Hymexazol (ISO); 3-hydroxy-5-methylisoxazole | 10004-44-1 |
1653 | Imiprothrin (ISO); reaction mass of: [2,4- dioxo-(2-propyn-1-yl) imidazolidin-3-yl] methyl(1R)-cis-chrysanthemate; [2,4-dioxo-(2-propyn-1-yl) imidazolidin-3-yl] methyl(1R)-trans-chrysanthemate | 72963-72-5 |
1654 | Bis(α,α-dimethylbenzyl) peroxide | 80-43-3 |
1655 | 6,6'-di-tert-butyl-2,2'-methylenedi-p-cresol; [DBMC] | 119-47-1 |
1656 | Tetrafluoroethylene | 116-14-3 |
1657 | (5-chloro-2-methoxy-4-methyl-3-pyridyl)(4,5,6-trimethoxy-otolyl)methanone; pyriofenone | 688046-61-9 |
1658 | (RS)-1-{1-ethyl-4-[4-mesyl-3-(2-methoxyethoxy)- otoluoyl]pyrazol-5-yloxy}ethyl methyl carbonate; tolpyralate | 1101132-67-5 |
1659 | Azamethiphos (ISO); S-[(6-chloro-2-oxooxazolo[4,5- b]pyridin3(2H)-yl)methyl] O,O-dimethyl thiophosphate | 35575-96-3 |
1660 | 3-methylpyrazole | 1453-58-3 |
1661 | N-methoxy-N-[1-methyl-2-(2,4,6-trichlorophenyl)-ethyl]-3- (difluoromethyl)-1-methylpyrazole-4-carboxamide; pydiflumetofen | 1228284-64-7 |
1662 | N-{2-[[1,1'-bi(cyclopropyl)]-2-yl]phenyl}-3-(difluoromethyl)-1- methyl-1H-pyrazole-4-carboxamide; sedaxane | 874967-67-6 |
1663 | 4-methylpentan-2-one; isobutyl methyl ketone (MIBK) | 108-10-1 |
1664 | Dimethomorph (ISO); (E,Z)-4-(3-(4-chlorophenyl)-3-(3,4- dimethoxyphenyl)acryloyl)morpholine | 110488-70-5 |
1665 | Imazamox (ISO); (RS)-2-(4-isopropyl-4-methyl-5-oxo-2-imidazolin-2-yl)-5-methoxymethylnicotinic acid | 114311-32-9 |
1666 | Thiamethoxam (ISO); 3-(2-chloro-thiazol-5-ylmethyl)-5- methyl[1,3,5]oxadiazinan-4-ylidene-N-nitroamine | 153719-23-4 |
1667 | Triticonazole (ISO); (RS)-(E)-5-(4-chlorobenzylidene)-2,2-dimethyl-1-(1H-1,2,4-triazol-1-methyl)cyclopentanol | 138182-18-0 |
1668 | Desmedipham (ISO); ethyl 3- phenylcarbamoyloxyphenylcarbamate | 13684-56-5 |
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