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Benzoic Acid (CAS 65-85-0) is an industry-standard organic acid preservative, yet its performance is heavily dictated by the environmental pH of the target formula. As a weak acid with a dissociation constant (pKa) of approximately 4.20, its antimicrobial utility depends entirely on the ratio of undissociated benzoic acid to benzoate ions.
In aqueous environments, only the undissociated form can cross cell membranes of microbes. Once inside the cytoplasm, the molecule encounters a neutral pH, dissociates, and releases protons, lowering the internal pH and disrupting cell function. Formulators must ensure their system operates within a pH range of 3.0 to 5.0 for maximum preservative activity.
Optimizing preservation efficiency requires a deep understanding of active concentrations at variable formulation phases:
Understanding how Benzoic Acid integrates into diverse daily chemical, cosmetics, and industrial cleaning formulations.
In modern personal care, mildness is paramount. Using pH-dependent preservation systems enables formulators to develop mild, amino-acid-based facial cleansers. When coupled with mild surfactants like *Sodium Lauroyl Sarcosinate* or *Disodium Cocoyl Glutamate*, Benzoic Acid maintains a skin-compatible pH of 4.5–5.0, defending formulations against microbial growth while preventing skin irritation.
Shampoos and conditioners containing cationic conditioning elements (e.g., *Cetrimonium Chloride* or *Polyurethane-10*) require stable acidic matrices to keep hair cuticles smooth. Standardizing Benzoic Acid within a low pH framework guarantees long-term product preservation while reinforcing static control and shine enhancement.
For household laundry liquids and dish soaps utilizing natural-origin surfactants (like *Lauryl Glucoside* and *AOS*), Benzoic Acid serves as a bio-friendly alternative to aggressive synthetic biocides. Its clean degradation profile matches the safety standards of ecolabels globally.
Suzhou Yuantairun Chemical Co., Ltd. sits at the heart of China’s advanced chemical industrial cluster, offering unmatched advantages in material scaling, purification, and reliable delivery routes.
Through our streamlined raw material sourcing networks, automated synthesis loops, and rigorous purity validation protocols, we deliver consistent particle sizing and low-odor profiles required for sensitive skin care formulas.
Our systems combine raw material security with custom analytical validation for demanding markets.
Navigating chemical validation, local compliance frameworks, and sustainable formulation trends.
Our processing sites and chemicals conform to international expectations. We supply full documentation packs, including REACH registration, FDA GRAS declarations, and Halal & Kosher certificates. This complete documentation speeds up custom clearance and formulation approvals for international distributors.
To prevent product clumping during ocean shipping, we customize particle sizing (ranging from fine powder to free-flowing granules). We provide multi-layer moisture-proof packaging, including 25kg Kraft paper bags, bulk supersacks, and custom dry containers to protect product integrity in humid regions.
As clean beauty trends expand, natural-origin preservatives are replacing standard petrochemicals. We focus on bio-based synthesis pathways, reducing the carbon footprint of production and meeting the requirements of modern sustainable personal care products.
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Premium Pearlescent Agent for body washes, shower gels, and conditioning shampoos.
Our raw materials power dynamic consumer and industrial formulas globally.
Formulation Base: SLES + AOS Surfactants.
Benefits: Delivers superior cleaning and high foam. Paired with CMEA for viscosity stabilization. Acid-adjusted systems run Benzoic Acid as a secondary bio-preservative to meet strict environmental standards.
Formulation Base: Sodium Cocoyl Glutamate + Sodium Lauroyl Sarcosinate.
Benefits: Clean-beauty compliant cleansing. Stabilized at pH 4.5–5.0 to optimize the active undissociated form of Benzoic Acid for long-term shelf stability without skin irritation.
Formulation Base: Cetrimonium Chloride (1631 70) Cationic Surfactant.
Benefits: Static reduction and softening. Low formulation pH keeps active elements suspended and optimized against microbial contamination.
Suzhou Yuantairun Chemical Co., Ltd. (YTR) is a dedicated supplier of premium raw materials for the daily chemical, home care, and industrial cleaning industries. We support customers through advanced research and development, customized pilot manufacturing, and integrated supply chains.
We work closely with global brands, contract manufacturers (CMOs), and regional chemical distributors to supply high-purity, environmentally friendly chemical components.
We design chemical systems to fit specific use cases and target price points:
Get in touch with our technical team to request product samples, custom packaging specifications, and direct factory pricing configurations.
Submit Wholesale Inquiry NowOur technical team answers common questions about formulating with organic acids and preserving personal care systems.
Benzoic Acid is a weak organic acid with a pKa of 4.2. Its ability to inhibit microbial growth depends on the concentration of its undissociated form. At a lower pH, more of the molecule remains undissociated, allowing it to easily pass through microbial cell walls. Once inside the cell, the neutral internal environment causes it to dissociate, releasing protons that disrupt the cell's metabolic activity and inhibit growth.
For optimal preservation, keep the formulation pH below 5.0. Ideally, target a pH range of 3.5 to 4.5. At this level, a sufficient percentage of the acid remains undissociated to control microbial growth, making it highly effective in body washes, face washes, and styling gels.
Yes, Benzoic Acid is highly compatible with mild surfactants like Potassium Cocoyl Glycinate and Sodium Lauroyl Sarcosinate. Because amino acid surfactants work well in skin-neutral pH ranges (pH 5.0–5.5), formulators often add a chelator like EDTA or co-preservatives like Phenoxyethanol to maintain preservation at the upper limit of the acid's active pH range.
Fine powders have a high surface area, which can lead to clumping under heat and humidity during ocean transit. To prevent this, YTR offers both fine powders and free-flowing granular grades. We pack our products in multi-layered, moisture-barrier bags to ensure the material remains dry and easy to handle upon arrival.
Suzhou Yuantairun Chemical provides complete regulatory documentation for international markets, including REACH registration for Europe, FDA compliance certifications, and Halal and Kosher approvals for food-grade applications.
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