Rosmarinol UV Protection Extract-CAS 537-42-8
Product Name: Rosmarinol UV Protection Extract (Natural Plant Anti-Photolysis & Anti-Photoaging Active Raw Material)
INCI Name: Rosmarinus Officinalis Leaf Extract, Rosmarinol
Alias: Rosemary Phenol Extract, UV Anti-Photolysis Factor, Plant-Derived Light Stabilizer, Sunscreen Efficacy Fixing Agent, High-Efficiency Antioxidant Extract, Post-Sun Soothing Repair Raw Material
CAS No.: 537-42-8 (Rosmarinol)
Appearance: Light yellow to yellowish-brown clear liquid, pure texture, no precipitation, no turbidity, no peculiar odor.
Grade: Cosmetic Premium Grade
MOQ (Minimum Order Quantity): 25KG
Solubility: Fully soluble in water and conventional polar cosmetic solvents, compatible with all water-phase skincare and sunscreen systems.
Storage Condition: Sealed and stored in dry, cool and ventilated warehouse, storage temperature 5–25℃, avoid direct strong sunlight irradiation, high temperature heating and damp environment. Keep tightly sealed after opening to prevent component oxidation and efficacy attenuation, avoid long-term exposure to air, and ensure long-term stable active efficacy of the extract.
Shelf Life: 24 Months
Rosmarinol UV Protection Extract, Rosemary Phenol Extract, Natural UV Stabilizer, Anti-Photolysis, Anti-Photoaging, Plant Antioxidant, Skin Soothing Repair, Sunscreen Synergistic Raw Material
Rosmarinol UV Protection Extract-CAS 537-42-8
Rosmarinol UV Protection Extract is a new generation of high-efficiency plant-derived light stabilization and anti-photoaging functional raw material, which is different from ordinary single-effect rosemary extracts on the market.
With high-purity rosmarinol polyphenol as the core active substance, it breaks the limitation of single antioxidant efficacy of traditional rosemary extracts, and innovatively realizes the triple core advantages of "sunscreen anti-photolysis stabilization + high-efficiency free radical scavenging + post-sun soothing repair".
It can effectively solve the common problems of traditional sunscreen products such as poor photostability, easy efficacy attenuation after long-term outdoor exposure, and insufficient anti-photoaging ability.
While assisting in optimizing full-band UV protection effects, it inhibits skin photooxidation aging, repairs sun-induced sensitive damage, and improves the comprehensive added value of sunscreen and light protection skincare products. With natural mild properties, zero formula discoloration and ultra-high system compatibility, it is the preferred plant synergistic raw material for upgrading high-end durable and stable anti-photoaging sunscreen formulas.




Key Benefits
• Exclusive Anti-Photolysis Technology, Stabilize Sunscreen Efficacy: Relying on the unique molecular stability of rosmarinol, it effectively inhibits the photolysis and inactivation of organic sunscreen filters under strong light, locks SPF/PA protection values, solves the pain point of rapid efficacy attenuation of outdoor sunscreens, and greatly improves the durability of full-spectrum protection.
• Superior Antioxidant Capacity, Inhibit Photoaging Fundamentally: High-activity rosmarinol polyphenols have ultra-strong free radical scavenging efficiency, which can comprehensively eliminate UVA/UVB-induced oxidative free radicals, block lipid peroxidation reaction, improve skin dullness, yellowness and fine lines caused by long-term light exposure, and delay skin premature aging.
• Natural Soothing & Barrier Repair, Mild & Non-Irritating: It has excellent anti-inflammatory and soothing activity, can rapidly relieve sun-induced skin redness, burning and sensitive discomfort, repair damaged skin barrier caused by light damage, reduce skin photosensitivity, and is suitable for sensitive skin and fragile skin care.
• Pure Plant High-Purity Extraction, High Safety & Wide Adaptability: Refined from pure natural rosemary plant, no chemical additives, no sensitizing and irritating components. After low-temperature purification technology, the product has low impurity content, high safety, no formula discoloration, and is compatible with clean beauty and mild skincare formulas.
• Excellent Water Solubility, Easy Formula Deployment: Fully water-soluble, fast dissolving without precipitation and turbidity, does not affect formula texture, viscosity and appearance. It can be flexibly added in multiple stages of water phase and homogenization, with high formula tolerance and simple debugging process.
• Multi-Effect Synergy, Upgrade Product Comprehensive Performance: Integrate light stabilization, anti-oxidation, anti-photoaging and soothing repair in one. It can be compounded with various sunscreen and antioxidant raw materials to achieve synergistic efficacy, comprehensively optimize product protection performance and skincare effect, and enhance market competitiveness.
Applications
• High-Stability Outdoor Long-Lasting Sunscreen Series: Core anti-photolysis and efficacy-fixing raw material for outdoor sports, travel and high-light exposure sunscreen products. It solves the problem of unstable protection of ordinary sunscreens under strong light, and realizes all-day stable and lasting full-spectrum UV protection.
• High-End Anti-Photoaging Skincare & Sunscreen Products: Exclusive functional component for anti-light-aging essence, lotion and high-end sunscreen. It combines light protection with anti-oxidation and anti-aging, effectively improves skin light damage aging, and upgrades the anti-aging attribute of light protection products.
• Post-Sun Soothing & Repair Series: Key soothing and repair active ingredient for after-sun toner, relief essence and barrier repair products. It relieves sunburn sensitivity and redness, repairs mild UV damage, and restores skin healthy and transparent state.
• Mild Sensitive Skin Light Protection Formula: Preferred natural stable raw material for sensitive skin mild sunscreen and daily light protection skincare. It reduces formula irritation, stabilizes skin state, and realizes safe and non-burden daily light damage defense.
• Water-Based Antioxidant Brightening Skincare Products: Applied in antioxidant toner, brightening lotion and translucent skincare products. It scavenges photooxidative dullness factors, improves post-sun yellowness and turbidity, and evens skin tone.
• Compound Sunscreen Synergistic System: Professional light stability synergist for water-oil compound sunscreen formulas. It cooperates with organic and physical sunscreens to optimize protection spectrum, fill stability blind areas, and comprehensively improve product protection quality.
Certificate Of Analysis (COA)
Test Item | Standard Specification | Test Result |
Product Name | Rosmarinol UV Protection Extract | Compliant |
Appearance | Light Yellow to Yellowish-Brown Clear Liquid, Odor Slight Characteristic | Compliant |
Rosmarinol Content (%) | ≥5.0 | 5.2 |
Solid Content (%) | ≥10.0 | 10.5 |
Loss on Drying (%) | ≤0.5 | 0.23 |
pH Value (1% Aqueous Solution) | 4.0–6.0 | 4.7 |
Heavy Metal (Pb) | ≤1ppm | 0.1ppm |
Arsenic (As) | ≤0.5ppm | Not Detected |
Mercury (Hg) | ≤0.1ppm | Not Detected |
Cadmium (Cd) | ≤0.1ppm | Not Detected |
Total Bacteria | ≤100CFU/g | Qualified |
Pathogenic Bacteria | Negative | Negative |
Conclusion | Conforms to cosmetic grade quality standard | Qualified |
Frequently Asked Questions (FAQ)
• Q1: What is the MOQ of Rosmarinol UV Protection Extract?
A1: The standard MOQ is 25KG, support sample orders for formula testing, sunscreen photostability debugging and anti-photoaging efficacy trial production, and support customized concentration specifications for mass production.
• Q2: What is the core formula positioning of this extract?
A2: It is a multi-functional plant light-stabilizing active raw material integrating sunscreen anti-photolysis, high-efficiency antioxidation and post-sun soothing repair. It is mainly used to solve the pain points of unstable sunscreen efficacy and insufficient anti-photoaging ability, stabilize outdoor long-term light protection, and improve the safety and skincare added value of light protection products.
• Q3: What is the recommended dosage in cosmetic formulas?
A3: Conventional water-based skincare: 0.5%–2.0%; Anti-photoaging essence & lotion: 1.0%–3.0%; High-stability sunscreen formula: 1.5%–4.0%; Post-sun soothing repair products: 1.0%–2.5%, adjustable according to product efficacy positioning and formula system.
• Q4: What is the difference between this product and ordinary rosemary extract?
A4: Ordinary rosemary extracts have low effective active content, single antioxidant efficacy, poor photostability and easy formula discoloration. This product is concentrated with high-purity rosmarinol as the core, with exclusive anti-photolysis light stabilization efficacy, stable formula performance, no discoloration, and integrated multiple repair and protection effects, with far higher comprehensive formula value.
• Q5: What raw materials is it suitable for compounding?
A5: It is highly compatible with water-soluble sunscreen agents, plant polyphenols, chlorogenic acid, ethyl ferulate, vitamin derivatives and various moisturizing and soothing ingredients. The compound system has stable activity and obvious synergistic effect, which can comprehensively improve product protection and anti-aging efficacy.
• Q6: What are the formula usage notes?
A6: Water-phase feeding is recommended, conventional feeding temperature 40–65℃; avoid long-term high temperature above 70℃ to prevent slight activity loss; suitable for weak acid and neutral formula systems; reasonable compounding with sunscreen filters can maximize anti-photolysis and long-acting protection effects.
• Q7: Can it provide stable supply and professional technical support?
A7: Strictly control core indicators such as rosmarinol content, solid content and heavy metals to ensure consistent batch stability. Support long-term bulk order supply, and provide one-stop professional services including sunscreen photostability optimization, anti-photoaging formula upgrading, efficacy debugging and after-sales technical guidance.
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