- ▸ Scale inhibitor: Threshold inhibitor for carbonate and sulfate scale in water systems.
- ▸ Dispersant: Disperses mineral and particulate matter in aqueous systems.
- ▸ Chelating agent: Sequesters hardness and metal ions.
- ▸ Detergency: Builder and anti-redeposition aid in cleaning formulations.
A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.
Request SDS →Sodium polyaspartate (CAS 55719-33-0) is the sodium salt of polyaspartic acid, a water-soluble polyamino-acid polyelectrolyte. As an anionic polycarboxylate it acts as a threshold scale inhibitor, dispersant, and sequestering (chelating) agent in water-treatment and cleaning systems.
Regulatory & registration requirements
- TSCA (US):
- REACH (EU): Not determined from public registry
- EC number: 686-842-5
TSCA Inventory flag XU: a substance exempt from reporting under the Chemical Data Reporting Rule (40 CFR 711) (EPA flag legend).
TSCA Inventory flag PMN: a commenced PMN (premanufacture notice) substance (EPA flag legend).
Source: EPA TSCA Inventory (July 2025 release) · ECHA CHEM — retrieved 2026-07-12
Solutions Using This Product
Process-solution guides on this site that specify this chemistry:
- Boiler Scale Prevention: Antiscalants & Dispersants (Water Treatment)
Frequently Asked Questions
What is polyaspartic acid?
Polyaspartic acid is a water-soluble polyamino-acid polymer built from repeating aspartic-acid units. Sodium polyaspartate (CAS 55719-33-0) is its sodium salt, an anionic polycarboxylate polyelectrolyte. RawSource supplies it for industrial water-treatment and cleaning applications.
What is the sodium salt of polyaspartic acid?
It is sodium polyaspartate (PASP-Na), CAS 55719-33-0, the neutralized sodium form of polyaspartic acid. In solution the carboxylate groups carry a negative charge, which is what drives its scale-inhibition and dispersancy. We stock it as a polyelectrolyte for aqueous systems.
What is sodium polyaspartate used for?
It works as a threshold scale inhibitor for carbonate and sulfate scale, a dispersant for mineral and particulate matter, and a sequestering (chelating) agent for hardness and metal ions. It also serves as a builder and anti-redeposition aid in cleaning formulations. Typical end-uses are cooling-water, boiler, and detergent systems.
Is sodium polyaspartate water soluble?
Yes. As an anionic sodium salt it is fully water-soluble and is normally handled as an aqueous solution or readily dissolved powder, depending on grade. That solubility is what lets it function as a threshold inhibitor and dispersant in water systems.
What is the cost of bulk sodium polyaspartate?
Bulk pricing depends on grade, solids content, order volume, and packaging (drums, totes, or IBCs). Request a current quote from RawSource with your target volume and we will return delivered pricing plus a CoA and SDS.
What is the REACH and TSCA regulatory status of Sodium Polyaspartate (PASP)?
Sodium Polyaspartate (PASP) (CAS 94525-01-6) is listed as Active on the U.S. EPA TSCA Inventory; its REACH registration status is not determined from the public ECHA registry.