Isobutyl Paraben High-efficiency Broad-spectrum Preservative Cosmetic Raw Material
Product Name: Isobutyl Paraben
Chemical Name: Isobutyl 4-Hydroxybenzoate
INCI Name: Isobutyl Paraben
CAS Number: 4247-02-3
EINECS Number: 224-208-8
Molecular Formula: C11H14O3
Molecular Weight: 194.23
Purity: ≥99.0% (HPLC)
Appearance: White Crystalline Powder, Odorless
Solubility: Soluble in ethanol, propylene glycol and cosmetic oil phase, slightly soluble in water
Effective pH Range: 4.0-8.0, stable in neutral and weak acid formula systems
Melting Point: 75℃ - 77℃
Grade: Cosmetic Grade, High-efficiency Broad-spectrum Antiseptic Grade
MOQ: 100g / 1KG / 25KG Drum
Shelf Life: 24 months (sealed, light-proof, cool and dry storage below 25℃)
Product Features: Strong antifungal ability, high-efficiency broad-spectrum bacteriostasis, stable formula, low dosage, good compatibility with cosmetic systems
Isobutyl Paraben, Isobutyl 4-Hydroxybenzoate, Cosmetic Preservative, Paraben Preservative, Broad-spectrum Antifungal, High-efficiency Bacteriostatic, Oil-soluble Preservative, Cosmetic Formula Stabilizer
Isobutyl Paraben-CAS 4247-02-3
Isobutyl Paraben is a classic and efficient oil-soluble paraben cosmetic preservative, belonging to the 4-hydroxybenzoate ester series.
Compared with methylparaben and ethylparaben, it has stronger antifungal and mold-inhibiting effects, with excellent inhibitory activity against molds, yeasts and partial bacteria in cosmetic formulas.
Featuring stable chemical properties, it is not easy to decompose in conventional cosmetic production processes and storage environments, effectively preventing product mildew, deterioration and odor.
With low effective dosage and high cost performance, it can be used alone or compounded with other paraben preservatives to form a synergistic antiseptic system, significantly improving the overall anti-corrosion effect.
It is a cost-effective and stable core preservative for traditional and mainstream cosmetic formula systems.



Key Benefits
• Strong Mold & Yeast Inhibition: Outstanding antifungal performance, far better than common methylparaben and ethylparaben, effectively solves cosmetic mildew and yeast pollution problems.
• Broad-spectrum Bacteriostatic & Antiseptic: Inhibits various molds, yeasts and gram-negative bacteria, comprehensively protects formula safety and stabilizes shelf life.
• Excellent Formula Stability: Stable activity in pH 4.0-8.0 range, resistant to conventional high-temperature processing, no decomposition or efficacy attenuation.
• Low Dosage & High Cost Performance: Low effective concentration, remarkable antiseptic effect, effectively reduces formula raw material cost with high cost performance.
• Good Compatibility: Perfectly compatible with most cosmetic raw materials, surfactants and oil-water systems, no precipitation, discoloration or odor change.
• Synergistic Compound Effect: Can be compounded with other paraben series preservatives to complement advantages and significantly improve overall anti-corrosion efficiency.
Applications
• Emulsion & Cream Series: Moisturizing lotion, nourishing cream, face cream, body cream, emulsion skin care products.
• Oil-based Cosmetic Series: Essential oil blends, oil-based skin care products, ointments, lipsticks and wax-based formulas.
• Daily Cleansing Series: Mild facial cleanser, body wash, hand care cleaning products.
• Traditional Mature Formulas: Classic skin care formulas that require stable anti-corrosion and low-cost matching.
• Long-shelf Daily Chemicals: Daily skin care and body care products with high requirements for mildew resistance and long shelf life.
• Compound Preservative System: Formula systems requiring synergistic anti-corrosion with multiple paraben ingredients.
Certificate Of Analysis (COA)
Test Item | Standard Specification | Test Result |
Product Name | Isobutyl Paraben | Compliant |
Appearance (25℃) | White Crystalline Powder, Odorless | White Uniform Crystalline Powder |
Purity (HPLC) | ≥99.0% | 99.6% |
Melting Point | 75℃ - 77℃ | 75.8℃ - 76.5℃ |
Loss on Drying | ≤0.5% | 0.18% |
Residue on Ignition | ≤0.1% | 0.05% |
Acidity (pH) | 4.0-7.0 | 5.6 |
Heavy Metal (Pb) | ≤1ppm | <0.5ppm |
Arsenic (As) | ≤0.2ppm | Qualified |
Total Plate Count | ≤100CFU/g | Qualified |
Conclusion | Meets cosmetic grade raw material standards | Qualified |
Frequently Asked Questions (FAQ)
• Q1: What is the core advantage of Isobutyl Paraben? A1: Strong antifungal ability, stable formula performance, low dosage and high cost performance, excellent compatibility with oil-based cosmetic systems, ideal for long-shelf-life products.
• Q2: What is the recommended addition dosage? A2: Single use 0.05%-0.2%, compound use 0.03%-0.15%, maximum legal addition limit 0.4% in cosmetics.
• Q3: What is the correct dissolving method? A3: Pre-dissolve in ethanol or oil phase at 40-60℃, then add into formula system, uniform dispersion without precipitation.
• Q4: What ingredients are suitable for compounding? A4: It can be compounded with methylparaben, ethylparaben, propylparaben and phenoxyethanol to build efficient and stable preservative systems.
• Q5: What formulas is it suitable for? A5: Preferred for cream, lotion, oil-based skin care and daily chemical products with high anti-mold and long shelf life requirements.
• Q6: Do you support sample testing and bulk supply? A6: Support small batch trial samples and long-term stable bulk supply, provide complete qualification reports and formula technical guidance.
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