Herb in Thai notifiable formulas
Longjack Root (Tongkat Ali)
ปลาไหลเผือก · Pla Lai Phueak
Eurycoma longifolia Jack
- Family
- Simaroubaceae
- Part used
- root
- Crude drug
- Eurycomae Longifoliae Radix
- Other names
- Ali’s Umbrella Root, Ali’s Walking Stick Root, Tongkat Ali Root
- In the announcement
- Used in 3 notifiable formulas (1 as capsules)
Thai Herbal Pharmacopoeia (THP)
Constituents and quality criteria of Longjack Root (Tongkat Ali)
Summarised from the Longjack Root monograph of the Thai Herbal Pharmacopoeia, Department of Medical Sciences, the standard used to test the dried root.
The pharmacopoeia sets no minimum marker content for this herb. Use the raw material quality criteria below for acceptance testing.
Constituents
Longjack Root contains quassinoids (e.g., eurycomanone, eurycomanol, eurycomalactone, and their derivatives). It also contains β -carboline and canthin-6-one alkaloids, volatile compounds (e.g., curcumene, massoilactone), etc.
Raw material quality criteria
| Foreign matter | Not more than 2.0% w/w |
| Loss on drying | Not more than 8.0% w/w |
| Total ash | Not more than 4.0% w/w |
| Acid-insoluble ash | Not more than 2.0% w/w |
| Water-soluble extractive | Not less than 7.0% w/w |
| Ethanol-soluble extractive | Not less than 2.0% w/w |
Storage: Longjack Root 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 Longjack Root (Tongkat Ali)
3 formulas containing Longjack Root (Tongkat Ali)
Select a formula to see its ingredients and indications. Formula names and indications are a reference translation; the Thai announcement is the legal text.
- Ya Chanthalila Traditional formula for feverRelieves fever (khai tua ron) and fever with the change of seasons (khai plian rudu)
- Ya Chanthalila Traditional formula for feverRelieves fever (khai tua ron) and fever with the change of seasons (khai plian rudu)
- Ya Chanthalila Traditional formula for feverRelieves fever (khai tua ron) and fever with the change of seasons (khai plian rudu)
Development potential
Develop Longjack Root (Tongkat Ali) into a product with the TIBD group
In notifiable formulas3 formulasused 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 plantTIBD · consultationPlan a product with Longjack Root (Tongkat Ali)
We check whether your formula qualifies for notification, detailed notification or registration with the Thai FDA, then prepare the filing documents.
Talk to our team on LINE