Benzoic Acid-Cosmetic Preservative(CAS 65-85-0)
Product Name: Benzoic Acid
Common Name: Benzenecarboxylic acid, Carboxybenzene
CAS Number: 65-85-0
Molecular Formula: C₇H₆O₂
Molecular Weight: 122.12
Product Grade: Cosmetic Grade
Purity: ≥99.5% high purity
Appearance: White shiny flaky crystal or crystalline powder, slight characteristic aromatic odor
Shelf Life: 36 months under sealed, cool, dry and dark storage condition
Benzoic acid, cosmetic preservative, food grade benzoic acid, mould and yeast inhibitor, pH sensitive preservative, raw material antibacterial agent, bulk benzoic acid supplier, compliant cosmetic preservative, benzoic acid antibacterial raw material
Benzoic Acid-Cosmetic Preservative(CAS 65-85-0)
Benzoic acid, also known as benzenecarboxylic acid, is a traditional and widely used organic acid preservative approved by global regulatory authorities. Its antibacterial mechanism depends on undissociated molecular state; under acidic environment, un-ionized benzoic acid can penetrate microbial cell membranes, inhibit intracellular respiratory metabolism, and finally kill mould, yeast and spoilage bacteria. Compared with composite preservatives, single benzoic acid features stable component, low cost and mature compatibility. It is mainly suitable for acidic formula systems, and often compounded with sodium benzoate to improve water solubility and broaden applicable pH range. It is a cost-effective universal preservative commonly used in daily chemicals, food, pharmaceuticals and industrial materials worldwide.
Key Benefits
• Powerful inhibitory effect on mould and yeast, solving product mildew spoilage problems efficiently
• Stable chemical property, no decomposition under conventional production temperature
• Low raw material cost, highly cost-effective for mass production formula
• Full global regulatory compliance, clear limit standard for cosmetic and food usage
• Good compatibility with most surfactants and thickeners in daily chemical formulas
• Less dosage required for antisepsis, no adverse effect on product fragrance
• Solid powder form, convenient for transportation, storage and accurate manual feeding
• Can be compounded with sodium benzoate to enhance water solubility and antibacterial efficiency
• No formaldehyde release, mild and low irritation to human skin
• Long-term antisepsis validity period, maintaining long-term shelf stability of finished products
Applications
• Acidic skincare products: fruit acid toner, VC serum, acidic essence, recommended dosage 0.1%-0.3%
• Acidic daily washing products: body wash, shampoo, hand soap with low pH value
• Food industry: fruit juice, carbonated drinks, jam, pickled vegetables and preserved fruits
• Oral care products: mouthwash, acidic toothpaste with antibacterial and antiseptic demands
• Compound preservative system: matched with sorbic acid to expand antibacterial spectrum
• Low pH household cleaning products: acidic toilet cleaner, multi-purpose cleaner
Certificate Of Analysis (COA)
Test Item | Standard Requirement | Test Result | Test Method |
Appearance | White flaky crystal or powder, slight aromatic odor | Complied | Visual & Olfactory Inspection |
Benzoic Acid Purity (HPLC) | ≥99.5% | 99.81% | High Performance Liquid Chromatography |
Melting Point Range | 121℃ - 123℃ | 121.6℃ - 122.4℃ | Melting Point Tester |
Loss on Drying | ≤0.5% | 0.12% | 105℃ Constant Temperature Drying |
Residue on Ignition | ≤0.1% | 0.03% | 800℃ Muffle Furnace |
Heavy Metal Lead (Pb) | ≤2ppm | <0.5ppm | ICP-MS |
Heavy Metal Arsenic (As) | ≤1ppm | <0.3ppm | ICP-MS |
Chloride Content | ≤0.02% | 0.005% | Titration Method |
Sulfate Content | ≤0.02% | 0.004% | Titration Method |
Total Aerobic Bacteria | ≤30CFU/g | Not Detected | Plate Count Method |
Conclusion | Meet cosmetic grade & food grade benzoic acid standard | Qualified | / |
Frequently Asked Questions (FAQ) & Document Request Frequently Asked Questions (FAQ) & Document Request
Q1: How to improve the poor water solubility of benzoic acid during production feeding?
A: We suggest three feeding methods: 1. Dissolve benzoic acid in hot water in advance before feeding; 2. Pre-dissolve with ethanol or propylene glycol; 3. Compound with sodium benzoate to improve overall water solubility. Do not add raw powder directly into cold water to avoid undissolved precipitation.
Q2: What is the difference between cosmetic grade and food grade benzoic acid?
A: Both grades share the same core purity index. Food grade has stricter limits on heavy metals, chloride and sulfate impurities, which meets oral contact safety standards; cosmetic grade focuses more on microbial indicators suitable for skin contact. We support customized delivery according to customer application scenarios.
Q3: Will long-term storage of benzoic acid cause caking or deterioration?
A: Sealed storage under dry and cool condition avoids moisture absorption and caking. This raw material has stable chemical properties, no deterioration, no volatilization and no activity attenuation within 36 months shelf life. If moisture absorbs and agglomerates, just crush it before use without affecting antisepsis performance.
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