Herb in Thai notifiable formulas

Siamese Rough Bush

ข่อย · Khoi

Streblus asper Lour .

Family: Moraceae
Part used: seed
Crude drug: Strebli Asperidis Cortex
Other names: Demon Tree Bark, Sandpaper Tree Bark, Tooth Brush Tree Bark
In the announcement: Used in 1 notifiable formula

Siamese Rough Bush, dried stem bark — Photo: Dinesh Valke from Thane, India · Wikimedia Commons · CC BY-SA 2.0 · resized

Thai Herbal Pharmacopoeia (THP)

Constituents and quality criteria of Siamese Rough Bush

Summarised from the Siamese Rough Bush Bark monograph of the Thai Herbal Pharmacopoeia, Department of Medical Sciences, the standard used to test the dried stem bark.

The pharmacopoeia sets no minimum marker content for this herb. Use the raw material quality criteria below for acceptance testing.

Constituents

Siamese Rough Bush Bark contains triterpenoids, including lupeol and α -amyrin. It also contains cardiac glycosides (e.g., asperoside, strebloside).

The THP monograph covers the stem bark, while the formulas use the seed, so the quality criteria on this page apply to the stem bark only.

Raw material quality criteria

Foreign matter	Not more than 2.0% w/w
Loss on drying	Not more than 7.0% w/w
Total ash	Not more than 17.0% w/w
Acid-insoluble ash	Not more than 8.0% w/w
Water-soluble extractive	Not less than 9.0% w/w
Ethanol-soluble extractive	Not less than 3.0% w/w

Storage: Siamese Rough Bush Bark shall be kept in well-closed containers, protected from light, and stored in a dry place.

Source: Thai Herbal Pharmacopoeia, Department of Medical Sciences (online edition, accessed 21 October 2026)Read the full THP monograph

Formulas using Siamese Rough Bush

1 formula containing Siamese Rough Bush

Select a formula to see its ingredients and indications. Formula names and indications are a reference translation; the Thai announcement is the legal text.

Tamrap Samunphrai Bamrung Rang Kai Formula 1 Herbal body tonic, Formula 1Helps nourish the body (body tonic)Health promotion
Pill · 1 of 7 ingredients · 15 g

Development potential

Develop Siamese Rough Bush into a product with the TIBD group

In notifiable formulas1 formulaused in multi-herb formulas

THP raw-material criteria6 testsfor acceptance testing before production

Marker with a minimum contentNot setquality is checked with the raw-material criteria

Three ways forward 1Notify a listed formula2Adapt it through detailed notification3Develop a Category B herbal medicine or Category C health productSee the development pathway

K-API · manufacturing in the group

Extract and manufacture at K-API

The TIBD group plant licensed by the Thai FDA to manufacture herbal products, so extraction and production stay within the group.

See the K-API plant TIBD · consultation

Plan a product with Siamese Rough Bush

We check whether your formula qualifies for notification, detailed notification or registration with the Thai FDA, then prepare the filing documents.

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