Surfactants Under Control: 7 Storage and Handling Mistakes That Cost Money and How to Avoid Them

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Surfactants play an indispensable role in industrial applications – from cleaning agents and cosmetics to additives for coatings and adhesives. Although these substances are designed for stability, their properties can be quickly compromised by improper storage conditions or handling errors. The result is not only financial losses due to raw material degradation but also risks related to workplace safety or the quality of the final product. In this article, we will look at seven specific mistakes that recur in practice and show how to prevent them using proven procedures and technical measures.

1. Underestimating temperature conditions: When surfactants turn into unusable mass

Surfactants are sensitive to extreme temperatures, whether low or high. At temperatures below freezing, some types (e.g., anionic surfactants based on alkyl sulfates) may crystallize or irreversibly separate, leading to the loss of their surface-active properties. Conversely, at temperatures above 40 °C, many surfactants undergo accelerated degradation, especially if exposed to light or oxygen. The result is reduced foaming, emulsifying capacity, or even the formation of undesirable by-products that may contaminate the entire batch.

The optimal storage temperature for most surfactants ranges between 10 and 25 °C. In practice, this means avoiding storage in unheated spaces during winter or near heat sources such as boilers or direct sunlight. If accidental freezing occurs, the product must be slowly warmed to room temperature and thoroughly mixed before use. For some sensitive surfactants (e.g., ethoxylates), storage under an inert nitrogen atmosphere may be necessary to prevent oxidation.

2. Improper Sealing of Containers: How Escaping Air and Moisture Ruin Quality

Surfactants are often hydrophobic or, conversely, strongly hydrophilic, meaning even small amounts of moisture from the surrounding air can cause their degradation. For example, anionic surfactants may absorb moisture and form clumps, while nonionic surfactants (e.g., alcohol ethoxylates) can hydrolyze in the presence of water. Additionally, airborne moisture can promote microbial growth, particularly in surfactants with higher water content or biodegradable variants.

The basic rule is to always reseal the original lid or use airtight containers with seals as quickly as possible after opening the package. For large containers (IBC containers, drums), it is advisable to use systems with inert gas (e.g., nitrogen) to prevent contact with moist air. It is also important to store surfactants separately from substances that may release moisture, such as certain inorganic additives or hygroscopic salts. Regular inspection of container seals and their immediate replacement in case of damage can save thousands of crowns in spoiled material.

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3. Contamination by residues of other chemicals: Why even small amounts can mean a big problem

Surfactants are often used in combination with other chemicals, but storing them near or in the same containers as other raw materials can lead to serious problems. For example, residues of acids or alkalis can catalyze hydrolytic reactions that alter the surfactant's structure and degrade its properties. Similarly, contamination with metal ions (e.g., iron, copper) can cause discoloration or accelerate oxidation, particularly in surfactants with unsaturated chains.

It is crucial to adhere to the principle of "one container – one raw material" and use only clean and dry tools for handling. If the same container must be used for multiple substances, it is essential to thoroughly clean and dry it between uses. For surfactants sensitive to contamination (e.g., amphoteric surfactants), it is recommended to use containers made of non-reactive materials, such as stainless steel or special chemical-resistant plastics. Regular staff training on the risks of cross-contamination and the implementation of strict control procedures can prevent unnecessary losses.

4. Ignoring Expiry Dates: When "It’ll Still Work" Means Losing Effectiveness

Surfactants, like other chemicals, have a limited shelf life, which is usually indicated on the packaging or in the technical data sheet. Exceeding the expiry date can lead to a gradual loss of effectiveness, changes in viscosity, phase separation, or even the formation of undesirable by-products. For example, in anionic surfactants, the active substance may gradually degrade, resulting in reduced foaming or emulsifying capacity. In non-ionic surfactants, cloudiness or sediment formation may occur.

Adhering to the expiration date is crucial, especially for surfactants used in cosmetics or pharmaceuticals, where quality and safety requirements are the strictest. In practice, this means implementing an inventory management system (e.g., FIFO – "first in, first out") to ensure that older batches are used first. If it is necessary to use a surfactant after its expiration date, it is advisable to conduct control tests (e.g., determination of surface tension, foaming capacity, or emulsion stability) according to standard methods to verify its suitability for the given application. Under no circumstances should surfactants exhibiting visible changes, such as color alteration, odor, or consistency, be used.

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Overlooking Mechanical Stress: How Improper Handling Damages Surfactant Structure

Surfactants are sensitive to mechanical stress, which can disrupt their molecular structure and reduce their effectiveness. During handling of containers—whether during transport, storage, or dosing—excessive shaking, dropping, or compression often occurs, leading to unwanted foaming, phase separation, or even degradation of active ingredients. For example, anionic surfactants may lose their ability to reduce surface tension if exposed to strong vibrations that disrupt their micellar arrangement.

Prevention involves careful handling of containers and using appropriate handling equipment. It is recommended to store surfactants in their original, sturdy containers and avoid transferring them into unsuitable vessels that may cause friction or impacts. When dosing, it is ideal to use pumps or dispensers with low shear stress. If surfactants must be mixed, this should be done slowly and with minimal mechanical stress to maintain their stability and performance.

Unsuitable Storage Containers: Why the Material of the Packaging Determines Surfactant Stability

The choice of storage container has a significant impact on the long-term stability of surfactants. Some materials, such as iron or copper, can catalyze oxidation reactions that lead to surfactant degradation, particularly those with unsaturated chains. Conversely, plastic containers made from unsuitable polymers may allow air or moisture to permeate, accelerating decomposition or contamination. For example, alcohol ethoxylate-based surfactants are sensitive to hydrolysis if stored in containers that are not sufficiently impermeable to water vapor.

For storing surfactants, containers made of non-reactive materials such as stainless steel, glass, or special chemical-resistant plastics (e.g., HDPE or PP) are recommended. It is also important to ensure that the packaging is clean, dry, and sealed to prevent contamination. For some surfactants, especially those with high viscosity, it is advisable to use containers with wide necks to facilitate handling and minimize the risk of contamination during sampling.

Inadequate Documentation and Traceability: How Warehouse Chaos Leads to Waste

Proper documentation and traceability are crucial for effective surfactant inventory management, especially in production facilities where multiple types of raw materials are used. Missing or inaccurate records of expiration dates, batches, or storage conditions can lead to the use of expired or degraded surfactants, resulting in reduced quality of final products and unnecessary costs. For example, using an anionic surfactant past its shelf life may cause insufficient foam stability in cleaning agents or reduced emulsifying capacity in cosmetic products.

To minimize risks, it is essential to implement an inventory management system that includes regular stocktaking, labeling of packages with expiration dates and storage conditions, and records of each withdrawal. The FIFO (First In, First Out) method is recommended to ensure that older batches are used first. Digitizing documentation, for example, using chemical management software, can significantly simplify traceability and reduce the risk of human error.

Need advice on selecting or storing surfactants?

Each raw material requires an individual approach – from the correct storage temperature to compatibility with packaging materials. GCG Group provides detailed safety data sheets (SDS) and technical specifications for all supplied surfactants to help you avoid unnecessary mistakes and optimize processes in your production. Contact us – or browse our catalog of over 1,300 products.