Methyl Ethyl Ketoxime (MEKO)
Methyl ethyl ketoxime, a derivative of hydroxylamine, is a clear, low-viscosity liquid used primarily as an anti-skinning agent in alkyd resin paints and coatings to prevent surface film formation during drying. It functions by complexing with metal driers, delaying oxidative drying. This chemically defined organic compound falls under HTS 2928.00.10.00 as a specific hydroxylamine derivative.
Import Duty Rates by Country of Origin
| Origin Country | MFN Rate | Ch.99 Surcharges | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | 3.7% | +10.0% | 13.7% |
| 🇲🇽Mexico | 3.7% | +10.0% | 13.7% |
| 🇨🇦Canada | 3.7% | +10.0% | 13.7% |
| 🇩🇪Germany | 3.7% | +10.0% | 13.7% |
| 🇯🇵Japan | 3.7% | +10.0% | 13.7% |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If pre-mixed with paint driers or as formulated organic compound
Blends with multiple additives for specific paint applications classified as compound preparations in chapter 38, not pure compounds.
If classified by ketone structure rather than oxime function
Alternative view prioritizing parent ketone (methyl ethyl ketone) over hydroxylamine derivative, though chapter notes favor oxime classification.
If for technical grade with significant impurities or stabilizers
Preparations not meeting 'chemically defined' purity threshold of chapter 29 note (a) fall under mixtures in heading 3824.
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Import Tips & Compliance
• Verify purity ≥99% with certificate of analysis (COA) as impurities may affect classification under chapter 29 note (a)
• Include safety data sheet (SDS) showing anti-skinning agent use to distinguish from general solvents (chapter 27 exclusions)
• Ensure packaging complies with DOT/UN 1993 flammable liquid regulations for transport
Related Products under HTS 2928.00.10.00
Industrial Grade Methyl Ethyl Ketoxime 99.5%
High-purity industrial methyl ethyl ketoxime (99.5%) used in 2K polyurethane coatings and silicone sealants as a catalyst blocker and anti-skinning agent. Its hydroxylamine derivative structure provides temporary inhibition of isocyanate reactions. Classified under HTS 2928.00.10.00 as a separate chemically defined organic compound per chapter notes.
MEKO Anti-Skinning Agent for Alkyd Paints
Specialty methyl ethyl ketoxime formulated for alkyd paint manufacturing, preventing skin formation by complexing cobalt/manganese driers. Used at 0.1-0.5% levels in air-drying coatings. Meets HTS 2928.00.10.00 as a pure hydroxylamine derivative essential for paint industry per chapter 29 scope.
Pharmaceutical Grade Methyl Ethyl Ketoxime
Ultra-high purity (99.9%) methyl ethyl ketoxime meeting USP/EP standards for use as intermediate in pharmaceutical synthesis of oxime-based drugs. Its hydroxylamine structure provides key reactivity for medicinal chemistry applications. HTS 2928.00.10.00 classification as chemically defined organic compound.
MEKO Silicone Cure Inhibitor
Methyl ethyl ketoxime specifically stabilized for use as cure inhibitor in room-temperature vulcanizing (RTV) silicone sealants. Selectively inhibits surface curing while allowing internal cure progression. Pure hydroxylamine derivative classifiable under HTS 2928.00.10.00 per chapter definitions.
MEKO Paint Drier Blocker
Low-odor methyl ethyl ketoxime developed as paint drier blocker for high-solids alkyd coatings. Provides controlled release of metal catalysts for optimal drying profile. Meets strict chapter 29 criteria as separate chemically defined hydroxylamine derivative under HTS 2928.00.10.00.