Astilbin
IUPAC name: (2R, 3R)-2-(3, 4-dihydroxyphenyl)-5, 7-dihydroxy-3-[(2S, 3R, 4R, 5R, 6S)-3, 4, 5-trihydroxy-6-methyloxan-2-yl]oxy-2, 3-dihydrochromen-4-one
Other name: Isoastilbin, Neoastilbin, Neoisoastilbin, Taxifolin 3-O-rhamnoside, Taxifolin 3-rhamnoside
Specification: Astilbin 80%, 90% by HPLC
Brief Introduction
Astilbin is a flavanonol, a type of flavonoid. Astilbin is the (2R-trans)-isomer; Neoisoastilbin is the (2S-cis)-isomer and isoastilbin is the (2R-cis)-isomer.
Astilbin can be found in St John's wort (Hypericum perforatum, Clusiaceae, subfamily Hypericoideae, formerly often considered a full family Hypericaceae), in Dimorphandra mollis(Fava d'anta, Fabaceae), in the leaves of Harungana madagascariensis (Hypericaceae), in the rhizome of Astilbe thunbergii, in the root of Astilbe odontophylla(Saxifragaceae), in the rhizone of Smilax glabra(Chinaroot, Smilacaceae) and in the bark of Hymenaea martiana. It can be isolated from Kohki tea processed from Engelhardtia chrysolepis (huang-qui).
Usage
Astilbin can act as an insecticide against Anticarsia gemmatalis and Spodoptera frugiperda. It shows in vitro antibacterial activity and activity on burn wound healing. Astilbin is used in traditional Chinese medicine.
| Product Name |
Astilbin |
Batch Number |
ERE-161118 |
| Botanical Source |
Engelhardtia roxburghiana Wall. |
Batch Quantity |
400kgs |
| Plant Part Used |
Leaves, 100% Natural |
Country of Origin |
China |
| Type of Products |
Standard Extract |
Active Ingredient Markers |
Astilbin |
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| Analysis Items |
Specifications |
Results |
Methods used |
| Identification |
Positive |
Conforms |
TLC |
| Appearance |
Fine Light Yellow Powder |
Conforms |
Visual test |
| Odor & Taste |
Characteristic |
Conforms |
Organoleptic test |
| Bulk Density |
40-55g/100ml |
Conforms |
ASTM D1895B |
| Particle Size |
95% through 80 Mesh |
Conforms |
AOAC 973.03 |
| Solubility |
Soluble in Boiling water |
Conforms |
Visual |
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| Assay |
NLT 80% Astilbin |
80.16% |
HPLC |
| Loss on Drying |
NMT 5.0% |
3.24% |
5g /105ºC /2hrs |
| Ash Content |
NMT 5.0% |
2.15% |
2g /525ºC /3hrs |
| Extract Solvents |
Ethanol & Water |
Conforms |
\ |
| Solvent Residues |
NMT 0.05% |
Conforms |
GC |
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| Heavy Metals |
NMT 10ppm |
Conforms |
Atomic Absorption |
| Arsenic (As) |
NMT 2ppm |
Conforms |
Atomic Absorption |
| Lead (Pb) |
NMT 2ppm |
Conforms |
Atomic Absorption |
| Cadmium (Cd) |
NMT 0.5ppm |
Conforms |
Atomic Absorption |
| Mercury(Hg) |
NMT 0.3ppm |
Conforms |
Atomic Absorption |
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| 666 |
NMT 0.1ppm |
Conforms |
USP-GC |
| DDT |
NMT 0.5ppm |
Conforms |
USP-GC |
| Acephate |
NMT 0.2ppm |
Conforms |
USP-GC |
| Methamidophos |
NMT 0.2ppm |
Conforms |
USP-GC |
| Parathion-ethyl |
NMT 0.2ppm |
Conforms |
USP-GC |
| PCNB |
NMT 0.1ppm |
Conforms |
USP-GC |
| Aflatoxins |
NMT 0.2ppb |
Absent |
USP-HPLC |
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| Sterilization Method |
High temperature & pressure for a short time of 5~10 seconds |
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| Microbiological Data |
Total Plate Count <10,000cfu/g |
< 1,000 cfu/g |
GB 4789.2 |
| Total Yeast & Mold <1000cfu/g |
< 100 cfu/g |
GB 4789.15 |
| E. Coli to be absent |
Absent |
GB 4789.3 |
| Staphylococcus to be absent |
Absent |
GB 4789.10 |
| Salmonella to be absent |
Absent |
GB 4789.4 |
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| Packing and Storage |
Packed in fiber drum, LDPE bag inside. Net weight: 25kg/drum. |
| Keep away from moisture, strong heat and sunlight. |
| Shelf Life |
2 years if sealed and stored in the recommended conditions. |
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