L Menthol Powder

Shaanxi Rebecca Biotechnology Co., Ltd. is an integrated manufacturer integrating R&D, production and sales of high-purity natural ingredients. We adopt advanced high-temperature drying and ultra-fine grinding technology to fully retain natural active substances while ensuring uniform particle size of finished products. All specifications of L Menthol Powder are produced and inspected in strict accordance with international industry standards.

Quality Certifications: We hold complete authoritative certifications including ISO9001, ISO22000, FSSC22000, HACCP, HALAL, KOSHER, cGMP, NOP and EOS. Every batch is available for third-party testing on heavy metals, solvent residues and microbial indicators, fully complying with EU EC396 and EU 2023/915 regulatory standards.

Production Capacity: Our automated production lines support mass production of powder, tablet, soft and hard capsule products, with flexible OEM/ODM customization services. We reserve raw materials in peak picking seasons and maintain stable inventory to avoid supply shortages and price fluctuations, ensuring stable and continuous supply for global clients.

Testing Equipment: Equipped with in-house HPLC, GC-MS and professional chiral analysis systems, we can accurately verify L-configuration purity, detect D-isomer impurities and monitor menthofuran content to fully meet the inspection standards of international pharmacopoeias.

Customer Support: We provide free product samples and competitive bulk pricing. For official technical datasheets and bulk order quotations, please contact our professional team.

We adopt diversified mature production routes to supply high-quality products for different application scenarios, with complete batch traceability system throughout the whole process. Our mainstream product L Menthol Powder is available in three production processes to match different-grade demands.

Raw Material Routes

Natural Extraction: Select fresh Asian peppermint raw materials, adopt steam distillation combined with freeze crystallization technology to retain natural terpenoid components, suitable for high-end natural formula products.

Chiral Asymmetric Synthesis: Take myrcene extracted from turpentine oil as raw material, adopt Rh-BINAP catalytic hydrogenation process to produce single-configuration L-menthol with controllable impurities, which is the preferred grade for pharmaceutical export business.

Racemic Resolution: Complete DL-menthol synthesis and esterification separation, with cost-effective advantages, meeting the mass production needs of industrial-grade products.

Grade Classification

99.0% Food/Cosmetic Grade: Adopt two-stage recrystallization process, stable quality, widely used in mainstream food and daily cosmetic products.

99.5% Pharmacopoeia Grade: Three-stage purification + activated carbon decolorization treatment, effectively reduce D-isomer and allergen content, compliant with pharmaceutical grade standards.

Solubility Profile: This ingredient has low water solubility, with a solubility of about 0.4g/L in cold water. It can be completely dissolved in ethanol, propylene glycol, glycerin and various vegetable oils. For high-concentration water-based formulas, emulsifiers or co-solvents are required to prevent crystal precipitation and floating phenomenon and ensure uniform formula system.

Thermal Stability: The product is volatile. Sublimation will occur when the ambient temperature exceeds 35°C, and severe volatilization loss will be caused above 80°C. It is necessary to appropriately adjust the formula ratio to compensate for material loss during hot filling and sugar boiling processes. Long-term high-temperature environment above 120°C will trigger chiral isomerization, convert valid L-type into inactive D-type, resulting in peculiar smell and weakened cooling effect.

Chemical Stability: It maintains stable chemical properties in the pH range of 4.0-8.5. Strong acid environment or long-term alkali reflux reaction will cause racemization and structural degradation. Long-term UV irradiation will lead to slow oxidation and product yellowing, so finished products need to use opaque packaging for protection.

Storage Recommendations: The product is non-hygroscopic but highly volatile. It is recommended to store it in a double-layer sealed aluminum foil bag and moisture-proof drum, with storage temperature controlled below 25°C and isolated from direct sunlight, to ensure the 24-month valid shelf life.

Step 1: Adopt vacuum distillation technology to treat myrcene raw materials, remove sulfide, diene impurities and polymer components, and complete dehydration and degassing treatment to avoid oxidative deterioration during storage.

Step 2: Use chiral rhodium catalyst for asymmetric hydrogenation reaction in a closed high-pressure reactor, with real-time GC monitoring to ensure directional synthesis of effective L-configuration and inhibit the generation of invalid D-isomers.

Step 3: Complete acid-base neutralization and multi-stage countercurrent washing to remove residual metal catalysts and water-soluble salts, and obtain crude menthol oil through liquid-liquid separation.

Step 4: Carry out gradient vacuum distillation under nitrogen protection, remove light components with peculiar smell and heavy oxidative impurities, and enrich high-purity intermediate menthol components.

Step 5: Adopt ethanol-water gradient recrystallization process. Food-grade products undergo two recrystallization cycles, while pharmaceutical-grade products adopt three recrystallization + activated carbon purification treatment to minimize menthofuran and D-isomer content. Realize mother liquor recycling to improve production yield and reduce cost.

Step 6: Low-temperature countercurrent solvent rinsing removes adsorbed impurities on the filter cake, and vacuum drying at ≤40°C effectively prevents product sublimation loss and thermal isomerization.

Step 7 (Optional): Provide β-cyclodextrin inclusion treatment to produce slow-release, anti-sublimation and water-dispersible powder, realizing long-lasting cooling effect.

Step 8: Complete particle size classification (80-200 mesh) and multi-batch homogenization treatment to eliminate batch differences in content, chirality and color, ensuring stable quality for large-scale orders.

Step 9: Adopt inner aluminum foil bag + 25kg moisture-proof drum double-layer packaging to prevent sublimation and deterioration. Each batch will pass full-item testing including L-content, ee chiral value, D-isomer, menthofuran, solvent residue, heavy metal and microbial detection, with official COA provided for shipment.

We implement full-process traceable quality management, covering raw material grading, production processing and finished product release. Chiral HPLC is used to detect enantiomeric excess rate, and GC-FID is applied to quantify volatile impurities. ICP-MS heavy metal detection and microbial testing are carried out in strict accordance with USP/EP international standards to ensure full compliance with global regulatory requirements. For pharmaceutical and export-grade products, we support third-party authoritative laboratory verification to further guarantee product quality authenticity and stability.

Standard Packaging Options

25kg Net Weight: Double-sealed aluminum foil inner bag + fiber drum outer packaging;

Custom Packaging: 1kg, 5kg, 10kg foil bags for laboratory R&D and pilot test orders;

Bulk Drums: 50kg PE lined drums for large-scale industrial production.

Transport Methods

Express Shipping: DHL/FedEx for samples and small orders, delivery within 3-5 working days;

Air Freight: Temperature-controlled air cargo for 100-500kg medium orders, delivery within 7-10 working days;

Sea Freight: Sublimation-resistant packaging for bulk container orders, delivery within 30-45 working days.

Delivery Documentation

Each shipment is equipped with complete documents including COA, MSDS, allergen declaration, and customized regulatory certificates such as HALAL and KOSHER according to destination country requirements. All logistics orders support real-time tracking inquiry.

Temperature Monitoring

We provide professional cold chain logistics for tropical high-temperature regions, equipped with temperature data loggers for whole-process monitoring, with automatic temperature deviation early warning to effectively avoid product sublimation loss during transportation.

Q1: How to avoid sublimation loss during long-distance sea shipment?A1: We adopt double-layer tight-sealed foil bags and thickened fiber drum packaging, and provide professional sublimation stability test data to guarantee valid content throughout the transportation cycle.

Q2: Can you stabilize batch-to-batch product differences?A2: Yes. We control raw material grading, standardized multi-stage purification and finished product batch blending to stabilize melting point, aroma and effective content, realizing consistent mass production quality.

Q3: Do you support long-term fixed-price cooperation?A3: We support quarterly fixed-price agreements for long-term cooperative clients. Seasonal raw material stocking effectively hedges market price fluctuations and ensures stable supply.

Q4: Is the product applicable for infant formula products?A4: The applicable dosage needs to comply with local food safety regulations. We can provide targeted dosage limit guidance according to different regional market standards.

Q5: What certifications can support pharmaceutical-grade application?A5: Our high-grade product meets USP, EP and JP pharmacopoeia standards, with complete impurity detection reports including D-isomer and menthofuran to support pharmaceutical production and export.

If you need L Menthol Powder sample testing, customized specification adjustment, technical formula guidance and bulk order quotation, please feel free to contact our professional technical team via information@sxrebecca.com. We provide one-stop ingredient solutions with reliable pharmaceutical-grade purity and stable supply chain to empower your product development and market competitiveness.