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Sodium Polyaspartate (PASP)

PASP
CAS 94525-01-6

Polyamino-acid polyelectrolyte for scale inhibition and dispersancy in water-treatment programs. As an anionic polycarboxylate it acts as a threshold scale inhibitor, dispersant, and sequestering (chelating) agent in water-treatment and cleaning systems.

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CAS Number
94525-01-6
Material Family
Acids & Salts
At a Glance
Material Family
Acids & Salts
Record Type
UVCB
Primary Role
pH Adjustment · Scale Inhibition
Functional Roles
pH Adjustment Scale Inhibition Chelation / Sequestration Corrosion Inhibition
Industries Served
Beauty & Personal Care Coatings & Construction Plastics & Polymers Water Treatment
Applications & Use Cases
  • ▸ 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.
Physical Properties
appearance
Amber to light-yellow liquid or off-white powder (typical)
form
Aqueous solution (~40%) or spray-dried powder (typical)
ph
8-10 (typical, neat/solution)
water_solubility
Fully miscible / freely soluble in water
average_molecular_weight
1,000-10,000 g/mol (typical, grade-dependent)
density
~1.2-1.3 g/cm3 (40% solution, typical)
biodegradability
>60% (OECD 301, readily biodegradable, typical)
Safety & Handling
Full SDS available on request

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.

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Chemical Identity
CAS Number
94525-01-6
Synonyms & Trade Names
Polyaspartic acid sodium salt Sodium poly(aspartate) L-Aspartic acid homopolymer, sodium salt Sodium salt of polyaspartic acid Polyaspartate sodium Thermal polyaspartate sodium salt
Full Description

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.

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.

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Disclaimer. Information on this page — including properties, identifiers, hazard, transport (DOT/UN) and tariff (HS) classifications, and applications — is provided for general reference and is compiled from authoritative public sources (e.g. PubChem/ECHA, 49 CFR 172.101, the Harmonized Tariff Schedule). Values are typical and are not a guaranteed specification; the Certificate of Analysis (CoA) for the lot purchased governs. Products are sold for industrial and professional use only. Nothing here is a medical, health, or efficacy claim or advice. Always consult the current Safety Data Sheet (SDS) before handling, storage, transport or disposal, and confirm regulatory status, classification and suitability for your application and jurisdiction. Hazard, transport and tariff classifications must be verified for your specific shipment. RawSource makes no warranty, express or implied, and assumes no liability for use of this information. Trademarks. Third-party trademarks and brand names are the property of their respective owners; any reference is nominative — used only to identify a comparable product — and does not imply affiliation with, sponsorship by, or endorsement by the trademark owner.
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