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1.Product Introduction
Japanese knotweed extract is the dried rhizome and root of Polygonum cuspidatum Sieb.et Zucc. Excavated in spring and autumn, removed fibrous roots, washed, cut into short or thick slices while fresh, and sun-dried. Distributed in Northwest, East, Central, South and Southwest China. It has the functions of dispelling dampness and relieving jaundice, clearing heat and detoxifying, dispersing blood stasis and relieving pain, relieving cough and resolving phlegm. Used for damp-heat jaundice, stranguria, leucorrhea, rheumatic arthralgia, carbuncle sore, water-fire scald, amenorrhea, dysmenorrhea, traumatic injury, lung-heat cough.
Polygonum cuspidatum Extract is used in traditional Chinese and Japanese medicine to treat a variety of ailments, including fungal infections, various skin inflammations, cardiovascular and liver diseases, and more. Resveratrol and emodin are the main functional components in Polygonum cuspidatum. Studies have shown that resveratrol and emodin exhibit broad antioxidant properties, such as LDL cholesterol oxidation and lipid peroxidation. Resveratrol has also been shown to help cardiovascular health and blood circulation, relieve pain, clear away heat and dampness, and detoxify and remove phlegm. Other ingredients including danthrone, emodin methyl ether and rhein have anti-inflammatory, anti-arthritic and antimicrobial activity.

2.Technical Date Sheet
Product Name | Resveratrol Powder | |
Botanical Name | Polygonum cuspidatum | |
Used Part | Root | |
Test items | Specifications | Test Methods |
Assay( Resveratrol) | NLT50% | HPLC |
Solvent Extraction | Water and Alcohol | |
Appearance | Brown Fine Powder | Visual |
Odor and Taste | Characteristic | Organoleptic |
Sieve analysis | 90% through 80 mesh | 80 Mesh Screen |
Loss on Drying | ≤5.0 % | 105℃/2 hrs |
Total Ash | ≤5.0 % | GB 5009.4 |
Bulk Density | 40~60 g/100mL | GB/T 18798.5 |
Tap Density | 60~90g/100mL | GB/T 18798.5 |
Lead (Pb) | ∠3.0mg/kg | GB 5009.12 |
Arsenic (As) | ∠2.0mg/kg | GB 5009.11 |
Cadmium (Cd) | ∠1.0mg/kg | GB 5009.15 |
Mercury (Hg) | ∠0.1mg/kg | GB 5009.17 |
Solvents Residue | ∠5000 mg/kg | GC |
Total Aerobic Count | ≤1000cfu/g | GB 4789.2 |
Yeast and Moulds | ≤ 100cfu/g | GB 4789.15 |
E-Coli | Negative | GB 4789.3 |
Salmonella | Negative | GB 4789.4 |
Staphylococcus Aureus | Negative | GB 4789.10 |
3.Function
●Edible efficacy
Polygonum cuspidatum can be used by humans. It can supplement the human body with rich nutrients, especially vegetable protein and amino acids, as well as the content of minerals. After people eat this vegetable, they can absorb and utilize the nutrients contained in it as soon as possible. Speeding up the metabolism of the human body can enhance the quality of the human body, and it has a very good conditioning effect on the physical weakness and low immunity of human beings.
●Medicinal efficacy
The medicinal effect of Polygonum cuspidatum is also very good. Usually people can take it to expel wind, relieve pain, and reduce dampness. It has an excellent therapeutic effect. In addition, it can also treat human bruises and burns, as well as various skin diseases such as malignant sores and ringworm. The therapeutic effect is also very obvious.

4.Other main chemical components and properties
①Emodin: Molecular formula C15H10O5, molecular weight 270.23. Orange-red crystal (glacial acetic acid). mp.256℃~257℃. Almost insoluble in water, soluble in ethanol, soluble in sodium carbonate and ammonium hydroxide. Soluble in sodium hydroxide (potassium), it is cherry red. Solubility (g/100ml): ether 0.14, chloroform 0.071, benzene 0.041, carbon tetrachloride 0.01 (25℃)
②Chrysophanol: synonym rhein, Chrysophanic acid, 3-Methylchrysazin. Molecular formula C15H10O4, molecular weight 254.23. Golden yellow hexagonal flake crystal (acetone) or needle crystal (ethanol).mp.196℃, Can sublime. Soluble in ether, chloroform, benzene, glacial acetic acid, ethanol, slightly soluble in methanol, insoluble in petroleum ether, insoluble in water, sodium bicarbonate and sodium carbonate aqueous solution, soluble in sodium hydroxide aqueous solution and hot carbonic acid Aqueous sodium solution.
③Emodin 6-methyl ether (Emodin monomethyl ether): molecular formula C16H12O5, molecular weight 284.26. Golden yellow crystal, mp.207℃, can be sublimated. Soluble in sodium hydroxide aqueous solution, the solubility is similar to chrysophanol.
④Emodin-6-methyl ether-8-D-glucoside (Anthraglycoside A): molecular formula C22H33O10, molecular weight 447.26. Yellow needles (dilute methanol), mp.230℃~232℃.
⑤Emodin 8-D-glucoside (Anthraglycoside B): molecular formula C21H20O10*1.5H2O, molecular weight 459.39. Golden yellow crystal (absolute ethanol), light yellow needle crystal (dilute ethanol, 1 molecular water). mp.191℃ ~194℃. Hardly soluble in water, ethyl acetate, soluble in ethanol, insoluble in benzene.
⑥Resveratrol glucoside (Polydatin): synonym Polydatin, Peceid. Molecular formula C20H22O8, molecular weight 390.40. The trihydrate is a colorless needle crystal (30% methanol or 40% acetone). mp.223℃~226℃(decomposition), easily soluble in methanol, ethanol, acetone, hot water. Soluble in ethyl acetate, sodium bicarbonate, sodium hydroxide aqueous solution, slightly soluble in cold water, insoluble in ether.
⑦Resveratol: Colorless needle crystal, mp. 256℃~257℃, sublimation at 261℃. Soluble in ether, chloroform, methanol, ethanol, acetone, etc.
⑧Other ingredients: flavonoids such as Quercetin, quercetin-3-galactoside, quercetin-3-rhamnoside, etc.; β-sitosterol, palmitic acid, stearic acid, etc. Polygonum cuspidatum leaves and stems also contain a small amount of hydroxyanthraquinone compounds, organic acids, flavonoids, etc.
5.Certificate

6.Third Part Test report

7.Factory

With the concept of “Quality First, Integrity First”, Shaanxi LonierHerb Bio-Technology Co., Ltd. are strictly performing the standard in production and quality control. For Japanese knotweed extract ,if any question ,welcome to contact by e-mail:info@lonierherb.com or whatsapp/Wechat:86-17702909819
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