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 64723-18-8, is safe for use as a stabiliser against tartrate crystal precipitation (anti-scaling additive), by EFSA Panel (Potassium Polyaspartate is Safe for Use As a Stabiliser in Wine). 

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

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