降香

English text reference: Chinese Pharmacopoeia (2020 Edition)

Overview

Dalbergia Odorifera Wood is the dried heartwood of the trunk and root of Dalbergia odorifera T. Chen (Fam. Leguminosae). The drug is collected throughout the year, removed from the bark, and dried in the shade.

Description

Pieces cylindrical or irregularly shaped; surface purple-red or reddish-brown, with dense texture on cut surface; texture hard, oily. Odour, slight; taste, slightly bitter.

Identification

（1）Powder brownish-purple or yellowish-brown. Vessels with large bordered pits, diameter of complete ones about 300 μm, mostly broken, bordered pits large and distinct, containing reddish-brown or yellowish-brown substances in the lumen. Fibres in bundles, reddish-brown, diameter 8-26 μm, walls very thick, some fibres surrounded by cells containing calcium oxalate prisms, forming crystal fibres, walls of cells containing crystals unevenly lignified. Calcium oxalate prisms diameter 6-22 μm. Rays 1-2 cells wide, up to 15 cells high, walls slightly thick, pits rather dense. Pigment cells reddish-brown, yellowish-brown or pale yellow.

（2）To 1 g of the powder add 10 ml of methanol, treat with ultrasound for 30 minutes, allow to stand, and take the supernatant as the test solution. Prepare a solution of the reference drug, Dalbergia Odorifera Wood, in the same manner as the test solution. Carry out the method for thin layer chromatography <0502>, using silica gel G as the coating substance and a mixture of toluene, ethyl acetate, and chloroform (7: 2: 1) as the mobile phase. Apply separately to the plate 2 μl of each of the above two solutions. After developing and removal of the plate, dry in air. Spray with a mixture of a 1% solution of vanillin in sulfuric acid and anhydrous ethanol (1: 9), heat at 105 °C to the spots clear. The spots in the chromatogram obtained with the test solution correspond in position and colour to the spots in the chromatogram obtained with the reference drug.

（3）Take the test solution and the reference drug solution prepared under the item Identification](2), carry out the method for thin layer chromatography <0502>, using silica gel G as the coating substance and a mixture of toluene and ethyl acetate (2: 1) as the mobile phase. Apply separately to the plate 2 μl of each of the above two solutions. After developing and removal of the plate, dry in air. Examine under ultraviolet light at 365 nm. The fluorescent spots in the chromatogram obtained with the test solution correspond in position and colour to the fluorescent spots in the chromatogram obtained with the reference drug.

Extractives

Carry out the method for determination of ethanol-soluble Extractives <2201, the hot maceration method>, using ethanol as the solvent, not less than 8.0 per cent.

Assay

Volatile oil

Carry out the method for determination of volatile oil <2204, method A>.

The volatile oil content of the drug is not less than 1.0% (ml/g).

Prepared slices

Dalbergia Odorifera Wood

Processing

Eliminate Foreign matter, split into small pieces, and grind into fine powder or slice.

Property

Warm.

Flavor

Pungent.

Meridian tropism

Liver and spleen meridians.

Actions

To promote blood circulation and stop bleeding, regulate qi and relieve pain.

Indications

Used for vomiting blood, nosebleed, bleeding due to trauma, liver depression causing pain in the hypochondrium, chest pain, stabbing pain in the chest, pain due to falls or blows, vomiting, and abdominal pain.

Dosage

9-15 g. For external use, an appropriate amount.

Administration

Add when the decoction is nearly done. For external use, an appropriate amount is ground into fine powder and applied to the affected area.

Storage

Preserve in a cool and dry place.

降香

Text reference: Chinese Pharmacopoeia (2015 Edition)

Overview

Rosewood is the dried heart wood of trunk and root of Dalbergia odorifera T. Chen (Fam. Leguminosae). The drug is collected all the year round, removed from the sap wood, and dried in the shade.

Description

In subcylindrical or irregular pieces. Externally purplish-red or reddish-brown, cut surface with dense striations. Texture hard, oily. Odour, slightly aromatic; taste, slightly bitter.

Identification

（2）取本品粉末1g，加甲醇10ml，超声处理30分钟，放置，取上清液作为供试品溶液。另取降香对照药材1g，同法制成对照药材溶液。照薄层色谱法（通则0502）试验，吸取上述两种溶液各2μl，分别点于同一硅胶G薄层板上，以甲苯-乙醚-三氯甲烷（7：2：1）为展开剂，展开，取出，晾干，喷以1%香草醛硫酸溶液与无水乙醇（1：9）的混合溶液，在105℃加热至斑点显色清晰。供试品色谱中，在与对照药材色谱相应的位置上，显相同颜色的斑点。

Examination

Extractives

Carry out the method for determination of ethanol-soluble extractives<2201, the hot extraction method>, using ethanol as the solvent, not less than 8.0 per cent.

Assay

照挥发油测定法（通则2204甲法）测定。

Prepared slices

Rosewood

Processing

Eliminate foreign matter, split into small pieces, and pulverize to fine powder or cut into slices.

Property

Pungent; warm.

Flavor

Liver and spleen meridians.

Actions

To resolve stasis, stanch bleeding, regulate qi, and relieve pain.

Indications

Hematemesis, epistaxis, traumatic bleeding, liver depression with hypochondriac pain, stabbing pain caused by chest bi disorders, pain caused by traumatic injuries, vomiting, and abdominal pain.

Dosage

9-15 g, added when the decoction is nearly done. Appropriate amount for topical application after grinding it into an extremely fine powder.

Storage

Preserve in a cool and dry place.