4-Chlorophenoxyacetic Acid
Product Overview
- 4-Chlorophenoxyacetic Acid (4-CPA), also known as para-chlorophenoxyacetic acid or 4-CPA, is a synthetic plant growth regulator belonging to the phenoxy-acid class of auxin-mimicking compounds. Chemically, it consists of a chlorinated phenoxy ring linked to an acetic acid functional group, giving it structural similarity to the natural plant hormone auxin (indole-3-acetic acid), which underlies its biological activity in plant tissue. 4-CPA is commercially supplied as a white to off-white crystalline powder with low water solubility in its free-acid form, though sodium and other salt formulations offer improved aqueous solubility for spray-application use. Procorbay International supplies technical-grade and formulation-grade 4-Chlorophenoxyacetic Acid to agrochemical manufacturers and formulators who use the compound as an active ingredient in plant growth regulator (PGR) products aimed at improving fruit set, reducing fruit drop, and promoting parthenocarpic (seedless) fruit development in various horticultural crops.
- 4-Chlorophenoxyacetic Acid is manufactured through the reaction of para-chlorophenol with chloroacetic acid under controlled alkaline conditions (Williamson ether synthesis approach), followed by purification and crystallization to achieve the required technical-grade purity. Procorbay sources 4-CPA from established agrochemical intermediate manufacturers with consistent quality control over purity, moisture content, and impurity profile specifications relevant to plant growth regulator formulation use.
- As a synthetic auxin analog, 4-CPA mimics the action of natural plant auxins, stimulating cell division and elongation processes when applied to flowering or fruiting plant tissue at controlled concentrations. Its primary agricultural significance lies in its widespread use as a fruit-set promoter and parthenocarpy inducer in crops such as tomatoes, eggplants, peppers, and certain stone and pome fruits, where it helps growers achieve more consistent fruit development, reduced flower and fruit drop, and improved yield uniformity, particularly under suboptimal pollination conditions.
- Beyond its direct plant growth regulator function, 4-CPA serves as a chemical intermediate in the synthesis of certain other phenoxy-acid agrochemical actives, reflecting its established position within agrochemical synthesis chemistry. Given the consistent seasonal demand from horticultural and greenhouse crop production sectors, particularly in regions with intensive vegetable and fruit cultivation, Procorbay maintains reliable sourcing of 4-Chlorophenoxyacetic Acid to serve agrochemical formulators and crop input distributors with dependable supply and documented technical specifications.
Applications
- Agriculture: Plant growth regulator promoting fruit set, reducing fruit drop, and inducing parthenocarpic (seedless) fruit development in horticultural crops.
- Chemical Manufacturing: Intermediate in the synthesis of certain phenoxy-acid agrochemical active ingredients.
- Industrial Processing: Component in specialty plant-growth-regulator formulation blends for greenhouse and controlled-environment agriculture.
Benefits
- Synthetic auxin analog with proven fruit-set and yield-improvement benefits
- Effective at low application concentrations in horticultural crop use
- Supports parthenocarpic (seedless) fruit development in target crops
- Reduces flower and fruit drop under suboptimal pollination conditions
- Established, long-standing use history in commercial horticulture
- Available in technical-grade and formulation-ready specifications
- Compatible with standard agrochemical formulation and spray-application systems
- Stable under standard storage conditions with predictable shelf life
- Cost-effective plant growth regulator option relative to alternative actives
- Consistent purity and impurity profile across supply batches
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Frequently Asked Questions
It is used as a synthetic plant growth regulator to promote fruit set, reduce fruit drop, and induce parthenocarpic (seedless) fruit development in various horticultural crops.
As a synthetic auxin analog, it mimics the plant's natural auxin hormone, stimulating cell division and elongation processes involved in fruit development.
Common applications include tomatoes, eggplants, peppers, and certain stone and pome fruit crops, though specific crop registration varies by region and formulation.
Yes, as an agrochemical active ingredient, its use is subject to registration and regulatory approval in most jurisdictions; buyers should confirm applicable registration status for their target market and crop use.
We supply technical-grade 4-Chlorophenoxyacetic Acid at ≥97% purity, suitable for downstream agrochemical formulation.