Diclosan CAS 3380-30-1 Formulation Guide for Surfactants

Diclosan CAS 3380-30-1 Physicochemical Properties and Handling Specifications

Understanding the fundamental physicochemical profile of 5-chloro-2-(4-chlorophenoxy)phenol is critical for process chemists designing robust industrial hygiene protocols. This active substance, commonly referred to as Diclosan, is typically supplied as a liquid solution containing 30% w/w of the active ingredient dissolved in 1,2-propylene glycol. The raw material solid exists as a white, flake crystal, but the commercial liquid form presents as a slightly viscous, colorless to brown fluid. This pre-dissolved state significantly reduces handling risks associated with dust generation during manufacturing, aligning with strict Industrial Hygiene standards.

From a molecular perspective, the compound possesses a molecular weight of 255 g/mol and a molecular formula of C12H8Cl2O2. At NINGBO INNO PHARMCHEM CO.,LTD., we ensure that every batch meets rigorous density and viscosity specifications to guarantee consistent dosing in automated production lines. The liquid typically exhibits a density between 1.070 and 1.170 g/cm³ at 25°C, with a viscosity remaining below 250 mPa·s under the same conditions. These parameters are essential for calculating pump rates and ensuring homogeneous distribution within large-scale mixing vessels.

Handling specifications require attention to thermal stability and storage conditions. The material maintains stability for at least two years in its original packaging when stored correctly. However, formulation scientists must note that while the substance is robust, it requires specific attention to pH and oxidative environments. A comprehensive COA (Certificate of Analysis) should always be reviewed upon receipt to verify UV absorption values, which typically range between 53.3 and 56.7 for a 1% dilution. This data serves as a primary quality Performance benchmark for incoming raw material verification.

Property	Unit	Typical Value
Physical Form	-	Liquid
Viscosity (25°C)	mPa·s	<250
Density (25°C)	g/cm³	1.070 - 1.170
Active Content	% w/w	30%

Solvent Selection and Solubility Profiles for Diclosan Liquid Integration

Effective integration of this Antibacterial Agent into final products relies heavily on selecting appropriate solvent systems. Due to the lipophilic nature of the dichlorophenoxy phenol backbone, the active ingredient exhibits low intrinsic solubility in water. Therefore, successful formulation requires the use of co-solvents that can maintain the active in solution prior to emulsification or dilution. The standard 30% propylene glycol carrier provides a solid baseline, but additional solvents may be required for high-concentration concentrates or specific anhydrous applications.

Technical data indicates excellent solubility in a wide range of organic solvents and glycols. For instance, the material demonstrates solubility greater than 50% in isopropyl alcohol, ethyl alcohol, glycerin, and dipropylene glycol. This versatility allows formulators to create stable Biocide Solution concentrates that can be easily pumped and metered. When designing liquid hand soaps or surface cleaners, leveraging these high-solubility solvents ensures that the active remains fully dissolved even under cold storage conditions, preventing crystallization or haze formation.

Conversely, solubility in hydrocarbon-based solvents is more limited. Data shows solubility in mineral oil is approximately 24%, while petroleum-based solvents hold only about 5%. This distinction is vital for developers working on oil-based industrial cleaners or lubricants with antimicrobial properties. If a formulation requires a high load of the active in a non-polar matrix, additional solubilizers or structural modifications to the solvent system may be necessary. Understanding these profiles prevents costly trial-and-error phases during R&D scaling.

• High Solubility (>50%): Isopropyl alcohol, Ethyl alcohol, Glycerin, Propylene glycol.
• Moderate Solubility: Mineral oil (24%).
• Low Solubility: Petroleum (5%).
• Water: Low intrinsic solubility; requires surfactant mediation.

Surfactant Compatibility and Phase Stability in Diclosan Formulations

Since water is the primary carrier for most consumer and industrial cleaning products, surfactant selection is the key to unlocking the potential of this Broad-Spectrum Biocide. The active must be solubilized within the micellar structure of the surfactant system to remain bioavailable and physically stable. Compatibility testing reveals that the material integrates well with common anionic and non-ionic surfactants used in home care and institutional cleaning markets. Proper solubilization prevents the active from precipitating out of the aqueous phase, which would render the product ineffective.

Specific compatibility data highlights successful integration with sodium lauryl sulfate (SLS) and sodium laureth sulfate (SLES), which are staples in the detergent industry. Solubility in a 10% surfactant solution can reach up to 8.0% with sodium dodecyl sulfate and 6.5% with sodium lauryl sulfate. Non-ionic options like coconut glycoside and lauramine oxide also show strong compatibility, supporting solubility levels around 6.0%. This flexibility allows Global manufacturer partners to adapt the active across various product lines, from heavy-duty degreasers to mild personal care cleansers.

However, chemical incompatibilities must be strictly managed to preserve efficacy. Notably, the active is unstable in formulations containing TAED (tetraacetylethylenediamine) reactive oxygen bleach systems. The oxidative nature of activated bleach can degrade the phenolic structure, leading to a loss of antimicrobial potency. Formulators should avoid combining this active with percarbonate or perborate systems activated by TAED. Instead, rely on non-oxidizing preservative systems or separate the active into a distinct phase if bleach compatibility is unavoidable, though separation is generally not recommended for stability.

Processing Guidelines for Incorporating Diclosan into Final Product Matrices

Thermal processing parameters are critical when incorporating this chemical into solid or liquid matrices. The compound should not be exposed to temperatures exceeding 150°C to prevent thermal degradation. For liquid formulations, this is rarely an issue, but for solid detergent manufacturing, such as laundry powders, specific process adjustments are required. It is recommended to add the active after the drying phase in a spray tower. Adding it prior to high-heat drying steps risks decomposing the active molecule, resulting in a product that fails efficacy testing.

Mixing protocols should ensure homogeneous distribution without introducing excessive shear that might destabilize the micellar structure. When dissolving the concentrated liquid into water, it is advisable to first mix the active with concentrated surfactants under mild heating if necessary. This pre-mix step ensures the active is fully encapsulated before dilution. If precipitation occurs during production, equipment cleaning instructions suggest using concentrated surfactants followed by a hot water rinse. This protocol avoids DCPP (dichlorophenoxy phenol) precipitation on vessel walls, which can be difficult to remove once cooled.

Safety during processing remains a priority. While the substance does not cause harmful health effects when used properly, adherence to safety data sheets is mandatory. Personnel should utilize appropriate personal protective equipment (PPE) during bulk handling to prevent skin or eye contact. As a Global manufacturer, NINGBO INNO PHARMCHEM CO.,LTD. provides detailed safety documentation to ensure compliance with local occupational health regulations. Proper ventilation and spill containment measures should be in place to maintain a safe production environment.

Validating Antimicrobial Efficacy and Shelf-Life in Commercial Applications

The primary value proposition of this ingredient lies in its potent antimicrobial efficacy across a wide range of pathogens. Validation using the agar incorporation method demonstrates extremely low Minimum Inhibition Concentration (MIC) values against both Gram-positive and Gram-negative bacteria. For instance, against Staphylococcus aureus (including Methicillin-resistant strains), the MIC is as low as 0.1 ppm. This high potency allows formulators to use lower inclusion rates while still meeting regulatory claims for disinfection and preservation.

Efficacy extends to common environmental contaminants such as E. coli and Klebsiella pneumoniae, with MIC values ranging from 0.07 to 2.0 ppm. This broad-spectrum activity makes it an ideal candidate for Surface Disinfectant applications in healthcare, food processing, and public facilities. When validating final products, challenge testing should confirm that the surfactant system does not bind the active to the point of inactivation. Maintaining the free active concentration above the MIC threshold throughout the product's shelf life is essential for claim substantiation.

Regarding shelf-life, the raw material maintains stability for at least two years in original packaging. In finished goods, stability is dependent on the overall formulation matrix, particularly pH and oxidative potential. Regular stability testing at elevated temperatures (e.g., 40°C/75% RH) is recommended to predict long-term performance. Documentation of these stability profiles supports regulatory filings and ensures that the Drop-in replacement into existing formulas does not compromise the commercial viability of the end product.

Organism	Strain	MIC (ppm)
Gram-Positive	Staph. aureus (MRSA)	0.1
Gram-Positive	Bacillus subtilis	10
Gram-Negative	E. coli	0.07 - 2.0
Gram-Negative	Klebsiella pneumoniae	0.07

Optimizing your formulation with high-purity actives ensures consistent performance and regulatory compliance. For detailed technical data sheets and to purchase Diclosan, partner with a supplier committed to quality and reliability. Ready to optimize your supply chain? Reach out to our logistics team today for comprehensive specifications and tonnage availability.