Table of Concentration Limits
DEA chemical code number | Concentration | Special conditions | |
List I Chemicals | |||
N-Acetylanthranilic acid, its salts and esters | 8522 | 20% by Weight | Concentration based on any combination of N-acetylanthranilic acid and its salts and esters. |
Alpha-phenylacetoacetamide (APAA) and its optical isomers | 8515 | Not exempt at any concentration | Chemical mixtures containing any amount of this chemical are not exempt. |
Alpha-phenylacetoacetonitrile, and its salts, optical isomers, and salts of optical isomers. (APAAN) | 8512 | Not exempt at any concentration | Chemical mixtures containing any amount of APAAN are not exempt. |
Anthranilic acid, and its salts and esters | 8530 | 50% by Weight | Concentration is based on any combination of anthranilic acid and its salts and esters. |
Benzaldehyde | 8256 | 50% by Weight or Volume | |
Benzyl cyanide | 8570 | 20% by Weight or Volume | |
N-(1-benzylpiperidin-4-yl)-N-phenylpropionamide (benzylfentanyl), including its salts | 8334 | Not exempt at any concentration | Chemical mixtures containing any amount of benzylfentanyl are not exempt. |
1-boc-4-AP (tert-butyl 4-(phenylamino)piperidine-1-carboxylate) and its salts | 8336 | Not exempt at any concentration | Chemical mixtures containing any amount of 1-boc-4-AP (tert-butyl 4-(phenylamino)piperidine-1-carboxylate) and its salts are not exempt. |
Ephedrine, its salts, optical isomers, and salts of optical isomers | 8113 | Not exempt at any concentration | Chemical mixtures containing any amount of ephedrine and/or pseudoephedrine, and their salts, optical isomers and salts of optical isomers are not exempt due to concentration, unless otherwise exempted. |
Ergocristine and its salts | 8612 | Not exempt at any concentration | Chemical mixtures containing any amount of ergocristine and its salts are not exempt. |
Ergonovine and its salts | 8675 | Not exempt at any concentration | Chemical mixtures containing any amount of ergonovine, including its salts, are not exempt. |
Ergotamine and its salts | 8676 | Not exempt at any concentration | Chemical mixtures containing amount of any ergotamine, including its salts, are not exempt. |
Ethylamine and its salts | 8678 | 20% by Weight or Volume | Ethylamine or its salts in an inert carrier solvent is not considered a mixture. Concentration is based on ethylamine in the mixture and not the combination of ethylamine and carrier solvent, if any. |
Gamma-Butyrolactone | 2011 | 70% by weight or volume. | |
Hydriodic acid | 6695 | 20% by Weight or Volume | |
Hypophosphorous acid and its salts | 6797 | 30% by weight if a solid, weight or volume if a liquid | The weight is determined by measuring the mass of hypophosphorous acid and its salts in the mixture, the concentration limit is calculated by summing the concentrations of all forms of hypophosphorous acid and its salts in the mixture. The Administration does not consider a chemical mixture to mean the combination of a listed chemical and an inert carrier. Therefore, any solution consisting of hypophosphorous acid (and its salts), dispersed in water, alcohol, or another inert carrier, is not considered a chemical mixture and is therefore subject to chemical regulatory controls at all concentrations. |
Iodine | 6699 | 2.2 | Calculated as weight/volume (w/v). |
Isosafrole | 8704 | 20% by Weight or Volume | Concentration in a mixture cannot exceed 20% if taken alone or in any combination with safrole. |
methyl alpha-phenylacetoacetate (MAPA; methyl 3-oxo-2-phenylbutanoate) and its optical isomers | 8795 | Not exempt at any concentration | Chemical mixtures containing any amount of MAPA and its optical isomers are not exempt. |
Methylamine and its salts | 8520 | 20% by Weight | Methylamine or its salts in an inert carrier solvent is not considered a mixture. Weight is based on methylamine in the mixture and not the combined weight of carrier solvent, if any. |
3,4-Methylenedioxyphenyl-2-propanone | 8502 | 20% by Weight | |
N-Methylephedrine, its salts, optical isomers, and salts of optical isomers | 8115 | 0.1% by Weight | Concentration based on any combination of salts N-methylephedrine, N-methylpseudoephedrine and their salts, optical isomers and salts of optical isomers. |
3,4-MDP-2-P methyl glycidate (PMK glycidate) and its optical and geometric isomers | 8535 | Not exempt at any concentration | Chemical mixtures containing any amount of this chemical are not exempt. |
3,4-MDP-2-P methyl glycidic acid (PMK glycidic acid) and its salts, optical and geometric isomers, and salts of isomers | 8525 | Not exempt at any concentration | Chemical mixtures containing any amount of this chemical are not exempt. |
N-Methylpseudoephedrine, its salts, optical isomers, and salts of optical isomers | 8119 | 0.1% by Weight | Concentration based on any combination of N-methylpseudoephedrine, N-methylephedrine, and their salts, optical isomers and salts of optical isomers. |
Nitroethane | 6724 | 20% by Weight or Volume | |
Norpseudoephedrine, its salts, optical isomers, and salts of optical isomers | 8317 | 0.6% by Weight | Concentration based on any combination of norpseudoephedrine, phenylpropanolamine and their salts, optical isomers and salts of optical isomers. |
N-phenethyl-4-piperidone (NPP) | 8332 | Not exempt at any concentration | Chemical mixtures containing any amount of NPP are not exempt. |
Phenylacetic acid, and its salts and esters | 8791 | 40% by Weight | Concentration is based on any combination of phenylacetic acid and its salts and esters. |
N -phenylpiperidin-4-amine (4-anilinopiperidine; N -phenyl-4-piperidinamine; 4-AP), its amides, its carbamates, its halides, its salts, and any combination thereof, whenever the existence of such is possible | 8335 | Not exempt at any concentration | Chemical mixtures containing any amount of 4-anilinopiperidine are not exempt. |
Phenylpropanolamine, its salts, optical isomers, and salts of optical isomers | 1225 | 0.6% by Weight | Concentration based on any combination of phenylpropanolamine, norpseudoephedrine and their salts, optical isomers and salts of optical isomers. |
Piperidine, and its salts | 2704 | 20% by Weight or Volume | Concentration based on any combination of piperidine and its salts. Concentration based on weight if a solid, weight or volume if a liquid. |
4-piperidone (piperidin-4-one), its acetals, its amides, its carbamates, its salts, and salts of its acetals, its amides, and its carbamates, and any combination thereof, whenever the existence of such is possible | 8330 | Not exempt at any concentration | Chemical mixtures containing any amount of 4-piperidone are not exempt. |
Piperonal | 8750 | 20% by Weight or Volume | |
Propionic anhydride | 8328 | 20% by Weight or Volume | |
Pseudoephedrine, its salts, optical isomers, and salts of optical isomers | 8112 | Not exempt at any concentration | Chemical mixtures containing any amount of ephedrine and/or pseudoephedrine, and their salts, optical isomers and salts of optical isomers are not exempt due to concentration, unless otherwise exempted. |
Red Phosphorus | 6795 | 80% by weight. | |
Safrole | 8323 | 20% by Volume | Concentration in a mixture cannot exceed 20% if taken alone or in any combination with isosafrole. |
White phosphorus | 6796 | Not exempt at any concentration | Chemical mixtures containing any amount of white phosphorus are not exempt due to concentration, unless otherwise exempted. |
List II Chemicals | |||
Acetic Anhydride | 8519 | 20% by Weight or Volume | |
Acetone | 6532 | 35% by Weight or Volume | Exports only; Limit applies to acetone or any combination of acetone, ethyl ether, 2-butanone, methyl isobutyl ketone, and toluene if present in the mixture by summing the concentrations for each chemical. |
Benzyl chloride | 8568 | 20% by Weight or Volume | |
2-butanone | 6714 | 35% by Weight or Volume | Exports only; Limit applies to 2-butanone or any combination of acetone, ethyl ether, 2-butanone, methyl isobutyl ketone, and toluene if present in the mixture by summing the concentrations for each chemical. |
Ethyl ether | 6584 | 35% by Weight or Volume | Exports only; Limit applies to ethyl ether or any combination of acetone, ethyl ether, 2-butanone, methyl isobutyl ketone, and toluene if present in the mixture by summing the concentrations for each chemical. |
Hydrochloric acid | 6545 | 20% by Weight or Volume | Hydrogen chloride in an inert carrier solvent, such as aqueous or alcoholic solutions, is not considered a mixture. Weight is based on hydrogen chloride in the mixture and not the combined weight of the carrier solvent, if any. |
Methyl isobutyl ketone | 6715 | 35% by Weight or Volume | Exports only pursuant to § 1310.08 ; Limit applies to methyl isobutyl ketone or any combination of acetone, ethyl ether, 2-butanone, methyl isobutyl ketone, and toluene if present in the mixture by summing the concentrations for each chemical. |
Potassium permanganate | 6579 | 15% by Weight | |
Sodium Permanganate | 6588 | 15% by Weight | |
Sulfuric acid | 6552 | 20% by Weight or Volume | Sulfuric acid in an inert carrier solvent, such as aqueous or alcoholic solutions, is not considered a mixture. Weight is based on sulfuric acid in the mixture and not the combined weight of the carrier solvent, if any. |
Toluene | 594 | 35% by Weight or Volume | Exports only; Limit applies to toluene or any combination of acetone, ethyl ether, 2-butanone, methyl isobutyl ketone, and toluene if present in the mixture by summing the concentrations for each chemical. |
21 C.F.R. §1310.12