Potassium Polyaspartate(PASP-K)

Potassium Polyaspartate(PASP-K)

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Potassium polyaspartate is the potassium salt of polyaspartic acid, produced from food grade L-aspartic acid and potassium hydroxide. 

Polyaspartic Acid Potassium Salt (Potassium polyaspartate, CAS Number 64723-18-, is proposed for use as a stabiliser against tartrate crystal precipitation (anti-scaling additive) in wine (red, rosé and white wine), with a maximum use level of 300 mg/L and typical levels in the range of 100-200 mg/L. 

Technology Specifications:

CAS number


Chemical name

L-aspartic acid, homopolymer, potassium salt


Not less than 98 % on dry weight basis

Particle size

Not less than 45 μm (not more than 1 % in weight of particles of less than 45 μm)


A light brown odourless powder


Very soluble in water and slightly soluble in organic solvents


7.5-8.5 (40 % aqueous solution)

Loss on drying

Not more than 11 % (105°C,12 hours)

Potassium hydroxide

Not more than 2 %

Aspartic acid

Not more than 1 %

Other impurities

Not more than 0.1 %

Arsenic (As)

Not more than 2.5 mg/kg

Lead (Pb)

Not more than 1.5 mg/kg

Mercury (Hg)

Not more than 0.5 mg/kg

Cadmium (Cd)

Not more than 0.1 mg/kg

Features & Functions:

• Strongly effective for tartrate stabilization in red and rosé wines: potassium polyaspartate interferes with the formation and growth of potassium bitartrate crystals, thus preventing their precipitation in bottle. It can stabilize highly unstable wines. Rapid and easy-to-use, is a great alternative to physical treatments (cooling, cations exchange resins and electrodialysis) and other stabilizing agents.

• Long-lasting stabilizing effect: It can stabilize wines for a few years. 

• Environmentally sustainable: the use of Potassium polyaspartate to stabilize wines for tartrates consumes small amount of water, power and produces little greenhouse gases. 

• Respectful of wine quality: no impact on wine sensory profile, less risk of oxidation, preservation of aromatics, color and wine structure. 

• Practical, fast and easy: Its application does not require investment in special equipment or specific skilled labor. 


Based on the solutions of catalyzed water soluble salts of Polyaspartic acid, we have a serious of high effency products used on agriculture, wine stabilizer industrial water treatment, oil and nature gas production fields.

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