Overview
3-Hydroxypropionic Acid (3-HP) is a three-carbon organic acid with both hydroxyl and carboxyl functional groups. It is naturally produced by some microorganisms as a metabolic intermediate and is increasingly synthesized for industrial applications due to its versatility. The compound is a key building block in green chemistry, enabling sustainable alternatives to petroleum-based chemicals. Its reactive groups make it a precursor for polymers like polyhydroxyalkanoates (PHA) and acrylic acid derivatives.
Physical and Chemical Properties
3-HP is a water-soluble liquid with a mild acidic character (pKa ~4.5). Its density is approximately 1.25 g/cm³, and it decomposes upon heating rather than boiling. The hydroxyl group allows for esterification and etherification reactions, while the carboxyl group participates in salt formation and polymerization. Stability is moderate; it may degrade under prolonged exposure to heat or strong oxidizers. Compatibility testing is recommended when blending with other chemicals.
Main Applications
In the polymer industry, 3-HP is polymerized to produce biodegradable plastics like poly(3-hydroxypropionate), used in packaging and medical devices. It also serves as a precursor for acrylic acid, a component of adhesives and coatings. Pharmaceutical applications include synthesizing statin side chains and antimicrobial agents. In food production, it acts as a preservative and flavor enhancer (subject to regional regulations).
Safety and Storage
3-HP is classified as an irritant (GHS Category 2). Use gloves (nitrile recommended) and goggles when handling. Ensure adequate ventilation to avoid vapor accumulation. Spills should be neutralized with a weak base (e.g., sodium bicarbonate) and rinsed with water. Store in HDPE or stainless steel containers at 15-25°C. Shelf life is typically 12-18 months when sealed under inert gas. Incompatible with strong oxidizers and bases.
B2B Procurement Guide
Industrial buyers should prioritize suppliers with ISO 9001 certification and batch-wise purity analysis (HPLC preferred). Technical-grade (≥95%) is common for polymer production, while pharmaceutical applications require ≥99% purity. Bulk purchases (100+ kg) often reduce costs by 20-30%. Consider regional logistics; 3-HP may require hazardous material transport documentation. Sample testing is advised to confirm compatibility with downstream processes.
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