Description

Arlacel 581 is a high-purity, non-ionic surfactant and emulsifier widely recognized for its exceptional performance in stabilizing complex formulations. Its primary value lies in creating stable, fine emulsions and dispersions, which is critical for product consistency and shelf-life. This makes it an essential ingredient for manufacturers in the pharmaceutical, cosmetic, and specialty chemical industries seeking reliable process aids and formulation stabilizers.

Application

• Primary emulsifier and stabilizer in the production of pharmaceutical creams, ointments, and topical lotions.
• Key ingredient in cosmetic formulations such as moisturizers, sunscreens, and makeup for stable texture and delivery.
• Stabilizing agent for pesticide and agrochemical emulsions to ensure uniform application and efficacy.
• Used in industrial lubricants and metalworking fluids as an emulsifier and corrosion inhibitor.
• Facilitates the formation of stable polymer emulsions and latex dispersions.
• Acts as a dispersing aid for pigments and dyes in various coating and ink systems.

Basic Information

Product Name	Arlacel 581
CAS No.	173940-37-9
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Sorbitan monostearate polyoxyethylene (20) ether; Polysorbate 60; Tween™ 60; Polyoxyethylene (20) sorbitan monostearate; POE (20) sorbitan monostearate; Ethoxylated sorbitan monostearate; E435
EINECS	Contact for details

Quality Control

Our Arlacel 581 is produced under a rigorous quality management system to ensure batch-to-batch consistency and high purity. Quality control includes comprehensive testing against relevant pharmacopeial standards (such as USP/NF, Ph. Eur.) where applicable. A Certificate of Analysis (COA) documenting key parameters like assay, identity, and impurity profiles is provided with every shipment to guarantee compliance with your specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at controlled room temperature (15-25°C). Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Yellowish to amber viscous liquid
Identification (IR)	Conforms
Assay (HPLC)	≥ 97.0%
Water Content (KF)	≤ 3.0%
Acid Value	≤ 2.0 mg KOH/g
Saponification Value	45 - 55 mg KOH/g
Hydroxyl Value	81 - 96 mg KOH/g

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