Polysuccinimide (PSI)
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Ada - 2023-05-22
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Polysuccinimide (PSI)
CAS Number: 31586-29-5
Molecular Formula: (C₄H₃NO₂)ₙ
Molecular Weight: 10,000–50,000 g/mol (n ≈ 100–500)
Synonyms:
Polysuccinicimide, PSI Intermediate, Polyaspartic Acid Precursor
Product Overview
Polysuccinimide (PSI) is a high-purity intermediate used in the synthesis of Sodium Polyaspartate (PASP-Na). It is supplied as a fine beige to light brown powder and exhibits controlled, gradual hydrolysis in aqueous environments, converting slowly into polyaspartic acid. This sustained-release behaviour makes PSI particularly suitable for long-term applications, such as scale inhibition in industrial water systems, where extended performance is essential.
Key Features
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Controlled Hydrolysis:
PSI undergoes slow hydrolysis in water, enabling a steady release of polyaspartic acid for prolonged efficacy. -
Environmentally Responsible:
Fully biodegradable, with breakdown products that are safe for the environment. -
Versatile Performance:
Combines scale inhibition, dispersion, and mild surface-active properties in one product. -
Chemical Versatility:
Serves as a key intermediate for further functionalisation and synthesis of specialty chemicals.
Technical Specifications
| Parameter | Specification |
|---|---|
| Appearance | Beige to light brown powder |
| Solubility | Low water solubility; slow hydrolysis |
| Inherent Viscosity | 0.15–0.35 dL/g |
| Molecular Weight Range | 10,000–50,000 g/mol |
| Moisture Content | ≤ 3.0% |
| Ash Content | ≤ 0.5% |
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