Sodium Polyaspartate (Abbr: PASP, also named Sodium of Polyaspartic Acid, CAS: 181828-06-8, EINECS: Not assigned, HS Code: 3911900090) is a yellow to reddish-brown transparent liquid (also available in solid powder form), a biomimetic water-soluble polyamino acid polymer recognized internationally as a "green chemical". We supply industrial grade, agricultural grade and daily chemical grade products complying with global environmental protection standards. It is completely biodegradable, phosphorus-free, non-toxic and pollution-free, with strong chelating, dispersing, scale-inhibiting and corrosion-inhibiting properties thanks to its abundant carboxyl and peptide bond active groups. Widely used as scale and corrosion inhibitor in industrial water treatment, nutrient absorption enhancer in agriculture, and functional additive in daily chemical, papermaking and textile industries.
| Items | Specifications |
| Solid Content | ≥40.0% (liquid grade) |
| Appearance | Yellow to Reddish Brown Transparent Liquid |
| pH Value (1% Aqueous Solution) | 9.0–11.0 |
| Density (20°C) | ≥1.20 g/cm³ |
| Molecular Weight | 1000–5000 Da |
| Phosphorus Content | 0% (Completely Phosphorus-Free) |
Applications
Water Treatment Industry (Core Application)
High-performance phosphorus-free scale and corrosion inhibitor for industrial circulating cooling water, boiler water, reverse osmosis systems, oilfield produced water and seawater desalination. It performs excellently in systems with high hardness, high alkalinity, high pH and high concentration ratio, effectively inhibits calcium carbonate, calcium sulfate and barium sulfate scaling, and provides mild corrosion protection for carbon steel equipment. Its scale inhibition effect is superior to traditional phosphorus-containing inhibitors, and it can be compounded with other water treatment agents for synergistic effect.
Agriculture & Fertilizer Industry
Widely used as fertilizer synergist and nutrient absorption promoter for grain, vegetables, fruits and flowers. It chelates medium and trace elements such as nitrogen, phosphorus, potassium, iron, zinc and manganese in soil, improves fertilizer utilization rate by 20–30%, reduces fertilizer loss, promotes crop root growth and increases yield. It can also be used together with pesticides to improve efficacy and enhance crop stress resistance.
Daily Chemical & Detergent Industry
Eco-friendly functional additive for laundry detergents, dishwashing agents and personal care products. It replaces traditional phosphorus-containing builders, chelates calcium and magnesium ions in hard water to improve detergency, and acts as anti-redeposition agent to prevent dirt from reattaching to fabrics. Its good biodegradability meets the requirements of green and low-carbon daily chemical products.
Papermaking & Textile Printing Industry
Used as dispersant and retention aid in papermaking process to improve filler retention rate and paper strength, and reduce white water pollution. In textile printing and dyeing, it acts as chelating dispersant to prevent metal ion interference, improve dye uniformity and color fastness, and reduce scaling on dyeing equipment.
Oilfield & Petrochemical Industry
Applied in oilfield water injection, gathering pipelines and refinery circulating water systems as scale inhibitor and corrosion inhibitor. It inhibits scaling of formation water and produced water, reduces pipeline blockage and equipment corrosion, and is also used as clay stabilizer and acidizing additive to improve oil recovery efficiency.
Metal Processing & Other Industrial Fields
Added to metal cutting fluids, grinding fluids and cleaning agents as corrosion inhibitor and dispersant, to protect metal workpieces from rust and improve processing surface finish. It also serves as dispersant for ceramic and coating production, and as water quality regulator for landscape water and aquaculture water bodies.
Product Advantages
✅ Green & biodegradable: 100% phosphorus-free and non-toxic, completely biodegradable in nature, no secondary pollution, fully compliant with global environmental protection requirements
✅ Excellent scale inhibition performance: High efficiency in inhibiting carbonate and sulfate scales, works stably under high hardness, high alkalinity and high pH conditions, superior to traditional phosphorus inhibitors
✅ Strong chelating & dispersing ability: Effectively chelates various metal ions, disperses suspended solids and sediment, with wide application scenarios and good formulation compatibility
✅ Dual function of scale & corrosion inhibition: Integrates scale inhibition and mild corrosion protection, reduces the dosage of multiple agents and lowers comprehensive use cost
✅ Good thermal stability: Maintains stable performance at high temperature, not easy to decompose, suitable for high-temperature water systems and boiler water treatment
✅ Multiple product forms: Both liquid and solid powder grades available, with adjustable molecular weight to match different industry application requirements
Packaging & Storage
Standard packaging for liquid grade: 25kg / 250kg food-grade HDPE plastic drums, 1000kg IBC tanks for bulk orders. Solid powder grade: 25kg kraft paper bags with inner PE liner. Store in a cool, dry and well-ventilated warehouse at 5–35°C. Keep containers tightly sealed, avoid direct sunlight and long-term contact with strong acids and oxidants. Shelf life is 24 months under proper storage conditions.
Safety Information
Classified as non-hazardous goods for regular transportation. The product is non-toxic, non-corrosive and non-irritating under normal use, with no flammable or explosive risk. Avoid direct contact with eyes and prolonged skin contact. In case of accidental contact, rinse immediately with plenty of clean water. Complete MSDS and quality inspection certificates are available upon request.
With 15 years of experience in chemical foreign trade, we offer the following core strengths to support your procurement needs:
- 1.A 70,000 ㎡ warehouse (20,000 MT capacity) with moisture-proof and temperature-controlled systems, enabling efficient fulfillment of large-volume orders.
- 2.Free samples (Ship within 3-7 days) to let you test products at zero trial cost.
- 3.Transparent lead time for hazardous chemicals: 45–60 days, with clear delivery schedules.
- 4.Certified with a Hazardous Chemical Business License and ISO certification, ensuring smooth customs clearance.
- 5.6 packaging options with customizable logos to minimize product loss during transportation.
- 6.Over 400 chemical SKUs available for one-stop procurement, helping you reduce sourcing costs.
Please share your purchase volume, target market, and other requirements, and we will tailor a customized solution for you!
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