Overview
Polyaspartic Acid (PASP) is a synthetic, water-soluble polymer derived from aspartic acid. It is celebrated for its biodegradability and versatility, making it a preferred choice in industries seeking eco-friendly alternatives to conventional chemicals. PASP mimics natural biopolymers, offering superior performance in scale inhibition, metal ion chelation, and dispersion. First commercialized in the 1990s, PASP has gained traction due to regulatory pressures on phosphates and other non-degradable additives. Its molecular structure allows tunable properties, enabling customization for specific applications such as agriculture or industrial water systems.
Physical and Chemical Properties
PASP exhibits high thermal stability (up to 120°C) and pH tolerance (2–12), making it suitable for harsh environments. Its polymeric backbone contains carboxyl groups, which enable strong binding to calcium, magnesium, and other metal ions—key for preventing scale formation in boilers or cooling towers. In powder form, PASP is hygroscopic and requires dry storage. Liquid formulations are typically aqueous solutions with 30–50% active content. The polymer’s biodegradability (>60% in 28 days under OECD 301B standards) distinguishes it from non-degradable alternatives like polyacrylates.
Main Applications
In water treatment, PASP is a high-efficiency scale inhibitor for industrial cooling systems and desalination plants. It disrupts crystal growth, reducing fouling and maintenance costs. Agriculture leverages PASP as a nutrient synergist, enhancing fertilizer uptake by crops while minimizing soil degradation. The personal care industry uses PASP in anti-aging creams and shampoos for its gentle chelating action. It also replaces phosphates in detergents, complying with global eco-label standards (e.g., EU Ecolabel). Emerging applications include biomedical uses, such as drug delivery systems, due to its biocompatibility.
Safety and Storage
PASP is non-toxic (LD50 > 5,000 mg/kg) and non-irritating to skin at recommended concentrations. However, powdered forms may cause respiratory irritation; use dust masks and ventilation during handling. Storage in HDPE containers is advised to prevent moisture absorption. For liquid formulations, avoid freezing and prolonged exposure to temperatures above 40°C to maintain stability. Suppliers typically provide SDS sheets confirming compliance with REACH and other regional regulations.
B2B Procurement Guide
When sourcing PASP, prioritize suppliers with ISO 14001 certification to ensure environmental responsibility. Key specifications include active content (30–50% for liquids, >90% for powders), viscosity, and biodegradability certifications. Bulk buyers (1+ metric tons) can negotiate prices to $5–$10/kg. For water treatment applications, request technical data on scale inhibition efficiency (e.g., % reduction in CaCO3 deposition). Agricultural buyers should verify compatibility with urea or NPK fertilizers. Sample testing is recommended to confirm performance in specific use cases.
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