Description

Phosphoric Acid, C3-9-Alkyl Esters, Potassium Salts is a specialized anionic surfactant derived from the partial esterification of phosphoric acid with a mixture of C3 to C9 alkyl alcohols, subsequently neutralized with potassium hydroxide. This compound is valued for its excellent emulsifying, dispersing, and anti-static properties, making it a versatile performance additive. It is primarily utilized in industrial formulations where stable emulsions, lubrication, and surface activity are required, serving sectors such as metalworking, textiles, and specialty cleaning.

Application

• Metalworking Fluids: Acts as an effective emulsifier and corrosion inhibitor in soluble oils and semi-synthetic coolants.
• Textile Processing: Used as a lubricant, anti-static agent, and emulsifier in fiber spinning and fabric finishing operations.
• Industrial & Institutional (I&I) Cleaners: Serves as a key surfactant and degreaser in heavy-duty alkaline and acidic cleaning formulations.
• Agricultural Adjuvants: Functions as an emulsifier and dispersant in pesticide and herbicide concentrates to improve spray application and plant coverage.
• Personal Care: Employed as a mild surfactant and emulsifying agent in select rinse-off products like shampoos and body washes.
• Paint & Coatings: Aids in pigment dispersion and stabilization in water-based coating systems.
• Plastic & Polymer Processing: Used as an internal and external anti-static agent for polymers like polyethylene and polypropylene.
• Leather Processing: Functions as a fatliquoring agent and emulsifier in leather tanning and finishing.

Basic Information

Product Name	Phosphoric Acid, C3-9-Alkyl Esters, Potassium Salts
CAS No.	68515-99-1
Molecular Formula	Mixture; typically CnH2n+1OP(O)(OK)2 and (CnH2n+1O)2P(O)OK (n=3-9)
Molecular Weight	Mixture (Contact for typical average)
Synonyms	Phosphoric Acid, C3-C9 Alkyl Esters, Potassium Salts; Potassium C3-9 Alkyl Phosphate; Alkyl (C3-9) Phosphate, Potassium Salt; Potassium Alkyl Phosphate (C3-C9); Phosphoric Acid Mono- and Di-C3-9 Alkyl Esters, Potassium Salts; Anionic Phosphate Ester Surfactant; APE Potassium Salt; POE (3-9) Phosphate, Potassium Salt
EINECS	Contact for details

Quality Control

Our Phosphoric Acid, C3-9-Alkyl Esters, Potassium Salts is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure consistent composition, activity, and performance. Key parameters monitored include active matter content, pH, moisture, and ionic balance. Certificates of Analysis (COA) documenting these specifications are available upon request to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive). Keep the container tightly sealed when not in use to prevent absorption of atmospheric moisture, which may affect product performance.

Specification

Item	Specification
Appearance	Clear to slightly hazy liquid
Color	Colorless to pale yellow
Identification (IR)	Complies
Active Matter (as potassium salt)	≥ 95.0 %
pH (10% aqueous solution)	6.0 - 8.0
Water Content	≤ 3.0 %
Free Alkali (as KOH)	≤ 1.0 %

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.