What is White Willow Extract?
White Willow Extract is a high-value botanical extract derived from the bark of Salix alba by advanced extraction and purification processes that concentrate the valuable naturally occurring constituents of the bark while ensuring product consistency and quality. It comes in several standardized specifications and customized grades and is used as a raw material for companies in the dietary supplement, functional food, beverage, and personal care industries. It is a delight to formulate due to its ability to be used in capsules, tablets, gummies, powder blends, botanical beverages, and cosmetic systems. The growing emphasis on using plant-based ingredients and maintaining transparency of sourcing, combined with a standardised production process, has seen it become a preferred ingredient for brands looking for reliable and recognised botanicals. Top-tier suppliers will have thorough quality assurance systems in place, including raw material verification, quality control processes and analyses to meet international quality standards. The product is also technically suited to the market and in line with the preferences for natural origin ingredients, clean label product concepts and sustainability approaches.

COA
| Item | Specification | Result | Test Method |
| Assay (Salicin) | ≥ 50.0% | 50.63% | HPLC |
| Appearance | Brown Yellow Fine Powder | Complies | Visual |
| Color | Brown Yellow | Complies | Visual |
| Odor & Taste | Characteristic | Complies | Organoleptic |
| Identification | Positive | Complies | TLC |
| Particle Size | 95% Pass 80 Mesh | 98% Pass 80 Mesh | USP |
| Loss on Drying | ≤ 5.0% | 3.12% | USP |
| Ash Content | ≤ 5.0% | 2.47% | USP |
| Bulk Density | 0.40–0.65 g/ml | 0.53 g/ml | USP |
| Tap Density | 0.50–0.80 g/ml | 0.67 g/ml | USP |
| Extract Solvent | Water & Ethanol | Complies | In-house |
| Heavy Metals | ≤ 10 ppm | < 10 ppm | ICP-MS |
| Lead (Pb) | ≤ 2.0 ppm | < 0.20 ppm | ICP-MS |
| Arsenic (As) | ≤ 1.0 ppm | < 0.10 ppm | ICP-MS |
| Cadmium (Cd) | ≤ 1.0 ppm | < 0.10 ppm | ICP-MS |
| Mercury (Hg) | ≤ 0.1 ppm | < 0.01 ppm | ICP-MS |
| Total Plate Count | ≤ 10,000 CFU/g | 320 CFU/g | USP |
| Yeast & Mold | ≤ 1,000 CFU/g | 45 CFU/g | USP |
| E. coli | Negative | Negative | USP |
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Features
White Willow Bark Extract Powder is usually made in the form of a very fine yellow-brown to brown powder with good flowability and handling properties and is suitable for capsules, tablets, powder blends, dry-mix applications, etc. A major advantage is that naturally occurring salicin and related phenolic compounds are present that can be standardized to specific concentrations so that formulators can make sure to create a consistent active profile and achieve batch-to-batch uniformity. Extracts are generally compatible with a wide variety of botanical ingredients, vitamins, minerals, and amino acids, and powdered fruit ingredients, ideal for complex formulations. It can offer good dispersibility in powder systems and can be supplied in specific mesh sizes to cater to various manufacturing needs, depending on the extraction process and specification. Standardized extracts made under controlled conditions generally exhibit fair stability when stored in conditions of low moisture, temperature, and direct sunlight. The relatively low inclusion percentage of the ingredient in many formulations also enables the product developer to maximize the formula space whilst maintaining the target specifications.
How to Store Properly?
1. Keep in the Original Sealed Packaging
Since the product is already packaged in accordance with the industry standard, manufacturers should ensure that the product is kept in the original packaging without being opened until it is used to help avoid environmental exposure and ensure product integrity.
2. Store in a Cool and Stable Environment
Store in a clean warehouse under controlled temperature conditions. Do not store in places where there are frequent temperature changes that can impact long-term product quality.
3. Protect from Excessive Humidity
Keep in a dry place in a controlled humidity environment. The excess moisture can lead to powder clumping and hinder production handling processes.
4. Avoid Direct Sunlight and Strong Light Sources
Familiarize and protect the product from direct sunlight, skylights, and high-intensity artificial lighting to maintain the physical appearance and standardized composition.
5. Minimize Air Exposure After Opening
Reseal after material withdrawals have taken place. Minimal exposure to air will prevent product loss of flowability and consistency.
6. Separate from Strong Odors and Volatile Materials
Keep away from chemicals, solvents, fragrances, or other strong-smelling materials, since the extracts of the plants can absorb the odors present in the surroundings during long-term storage.
7. Follow FIFO Inventory Management
Manage inventory by the "first in, first out" principle to prioritize the use of older products, promoting good warehouse management and product rotation.
8. Use Appropriate Handling Procedures
White Willow Bark Extract uses clean and dedicated equipment when transferring, sampling, and producing to avoid cross-contamination and to ensure the quality requirements set by the original packaging and making process.

Recommended Usage
The extract is usually mixed with appropriate excipients or complementary botanical powder for capsule products to ensure uniform distribution, better flowability, and uniform filling during capsule making. In tablet formulations, Willow Bark Extract Powder can be used in combination with binders, fillers, and processing aids, and optimized particle size, compression properties, and tablet hardness to optimize tablet production. If mixing is required for the production of a liquid product (such as a botanical drink or a liquid formulation), the extract can be pre-dispersed with the addition of suitable dispersion vehicles or solubilising systems to ensure efficient mixing and uniform appearance throughout the product. When developing multi-ingredient formulations, formulators must test the compatibility of the plant extract with other ingredients such as vitamins, minerals, and natural flavors to ensure a balance of ingredients. In the manufacturing phase, the concentration of extracts, moisture control, mixing sequence, or processing temperature may be some of the factors that should be taken into account in order to keep the ingredients of the product stable and ensure consistent product quality. It is standardized with consistent specifications and offers flexibility in creating capsules and tablets, as well as liquid products and other botanical formulations for export to worldwide markets.
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