White Willow Bark Extract Powder

White Willow Bark Extract Powder Supplier:

Guanjie Biotech specializes in white willow bark extract research and trading for 20 years. It is from the bark, branches, and stems of the Salicaceae plant, white willow, after extraction and spray drying. The main active ingredient is salicin, which is a brown to white powder. We have different specifications:15%,20%,50%,95% and use grain alcohol or the water extraction method. In order to ensure the quality, we use HPLC and other testing methods. As a professional supplier, welcome to enquiry us.

Why Choose Guanjie Biotech?

● We have a warehouse in NJ, USA;

● Multiple shipping methods for your choice: FEDEX, DHL, TNT, UPS, SHIPMENT BY AIR &SEA;

● Competitive shipping price and experienced professional shipping agent;

● Customize Willow Bark Extract Powder Salicin products according to your requirements;

● Available Certificates of ISO9001, ISO22000, Kosher, Halal;

● Practical Base for Master's Students in the School of Chemistry and Materials Science, Northwest University.

 

What Is White Willow Bark Extract Powder?

White Willow Bark Extract Powder Salicin is a white crystal with a bitter taste and a melting point of 199-202℃. Its specific optical rotation [α] is -45.6° (0.6g/100cm3 absolute ethanol). Salicin is soluble in water, easily soluble in boiling water, insoluble in ethanol (1:90), and insoluble in ether or chloroform. However, it is soluble in alkaline solution, pyridine or glacial acetic acid. Its aqueous solution has a neutral reaction, and the molecule does not contain a free phenolic hydroxyl group, making it a phenolic glycoside compound. When hydrolyzed by dilute acid or amygdalin, it generates glucose and salicyl alcohol. Salicyl alcohol has a molecular formula of C7H8O2, and it is an orthorhombic colorless needle crystal with a melting point of 86-87°C. When heated to 100°C, it sublimes and is soluble in water and benzene. Salicyl alcohol is easily soluble in ethanol, ether, and chloroform and turns red when it meets sulfuric acid.

 

COA

Item	Specification	Result	Method
Marker Compounds
Assay (Salicin)	>15.0%	>15.12%	HPLC
Organoleptic Data
Appearance	Fine Powder	Conform	GJ-QCS-1008
Color	Light yellow	Conform	GB/T 5492-2008
Odor	Characteristic	Conform	GB/T 5492-2008
Taste	Characteristic	Conform	GB/T 5492-2008
Process Data
Method of Processing	Extraction	Conform	/
Solvent(s) Used	Ethanol&Water	Conform	/
Drying Method	Spray drying	Conform	/
Physical Characteristics
Particle Size (80 mesh)	98.0%pass 80mesh	Conform	GB/T 5507-2008
Loss on drying	<5.0%	3.03%	GB/T 14769-1993
Ash Content	<4.0%	2.15%	AOAC 942.05, 18th
Solvent Residue	None	Conform	GJ-QCS-1007
Sterilization Method	NO-IR & GMO-Free	Conform	/
Heavy Metals
Total Heavy Metals	<10ppm	Conform	USP <231>, method II
As	<2.0ppm	Conform	AOAC 986.15, 18th
Pb	<2.0ppm	Conform	AOAC 986.15, 18th
Cd	<0.5ppm	Conform	AOAC 986.15, 18th
Hg	<0.5ppm	Conform	AOAC 971.21, 18th
Cr	<2.0ppm	Conform	AOAC 986.15, 18th
Pesticide Residue
666	<0.2ppm	Conform	GB/T5009.19-1996
DDT	<0.2ppm	Conform	GB/T5009.19-1996
Microbiology
Total Plate Count	<1,000/g	90/g	AOAC 990.12, 18th
Total Yeast & Mold	<100/g	10/g	FDA (BAM) Chapter 18, 8th Ed.
E. Coli	Negative	Negative	AOAC 997.11, 18th
Salmonella	Negative	Negative	FDA (BAM) Chapter 5, 8th Ed.
Shigella	Negative	Negative	AOAC 997.11, 18th
Clostridia	Negative	Negative	FDA (BAM) Chapter 5, 8th Ed.

 

Specification:

There are different specifications of white willow bark extract powder. 

● 15% brownish yellow, high ash content, general water solubility

● 25% brownish yellow, high ash content, general water solubility

● 30% yellow, high ash content, good water solubility

● 50% light yellow, high ash content, good water solubility

● 80% off-white, low ash content, good water solubility

● 98% white, low ash, good water solubility

 

What Is White Willow Bark Extract Powder Produced?

 

What Is the Testing Method of White Willow Bark Extract Powder?

The quality and standardization of white willow bark extract powder are primarily evaluated by determining the content of salicin, the key bioactive compound responsible for its functional properties. High-performance liquid chromatography (HPLC) is commonly used due to its accuracy, sensitivity, and reproducibility in quantitative analysis.

 

Testing Method - Detection of White Willow Bark Extract Powder Salicin

Note: All solvents used in the analysis should be chromatographic grade to ensure precision and avoid interference during detection.

Chromatographic Conditions

The analysis is carried out using a Lichrospher C18 chromatographic column (250 mm × 4.6 mm, 5 μm particle size). The mobile phase consists of acetonitrile and water at a ratio of 10:100. The flow rate is maintained at 1.0 mL/min to achieve optimal separation efficiency. Detection is performed at a wavelength of 269 nm, which corresponds to the maximum absorption of salicin. The column temperature is controlled at 30 °C to ensure stable retention time and peak shape, while the injection volume is set at 10 μL.

 

Solution Preparation

● Reference Solution Preparation: Accurately weigh 20 mg of the White Willow Bark Extract Powder salicin reference standard and transfer it into a 50 mL volumetric flask. Add purified water to dissolve completely and dilute to volume to obtain the standard solution.

● Sample Solution Preparation: Precisely weigh 15 mg of the white willow bark extract powder into a 25 mL volumetric flask. Add water and subject the mixture to ultrasonic extraction for 20 minutes to ensure complete dissolution. After cooling, dilute to volume with water and filter through a 0.45 μm microporous membrane before analysis.

 

Determination

Once the chromatographic system reaches a stable baseline, inject the prepared sample solution under the specified conditions. The White Willow Bark Extract Powder Salicin content is quantified using the external standard method by comparing the peak area of the sample with that of the reference standard. This method ensures reliable quality control and consistent product standardization.

 

Factory&Team：

 

Certification

 

Package & Shipment

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