Herb in Thai notifiable formulas

Som Sa Peel

ส้มซ่า · Som Sa

Citrus × aurantium L. ‘Som Sa'

Family: Rutaceae
Part used: peel
Crude drug: Citri × Aurantii Exocarpium et Mesocarpium
In the announcement: Used in 1 notifiable formula

Som Sa Peel, dried exocarp with some unremovable mesocarp — Photo: Zeynel Cebeci · Wikimedia Commons · CC BY-SA 4.0 · resized

Thai Herbal Pharmacopoeia (THP)

Constituents and quality criteria of Som Sa Peel

Summarised from the Som Sa Peel monograph of the Thai Herbal Pharmacopoeia, Department of Medical Sciences, the standard used to test the dried exocarp with some unremovable mesocarp.

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

Constituents

Som Sa Peel contains flavonoids (e.g., hesperidin and naringenin) and volatile oils rich in limonene. It also contains phenolic acids, coumarins, limonoids, phenylethylamine alkaloids such as p-synephrine, etc.

Raw material quality criteria

Foreign matter	Not more than 2.0% w/w
Total ash	Not more than 10.0% w/w
Acid-insoluble ash	Not more than 0.5% w/w
Water-soluble extractive	Not less than 21.0% w/w
Ethanol-soluble extractive	Not less than 7.0% w/w
Volatile oil	Not less than 3.5% v/w

Storage: Som Sa Peel shall be kept in well-closed containers, preferably of metal or glass, protected from light, and stored in a cool and dry place. Identi𿿿cation A. Sonicate 1 g of the sample, in powder, with 10 mL of methanol for 30 minutes and filter (solution 1). To 2 mL of solution 1, add a few drops o.

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

Formulas using Som Sa Peel

1 formula containing Som Sa Peel

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 Hom Thep Chit Fragrant cordial formula for dizziness and palpitationsRelieves subtle wind (lom kong la-iat) causing symptoms such as dizziness, faintness (sawing sawai), palpitations, etc., and nourishes the mind (bamrung duang chit) so that it is refreshedThai traditional medicine
Powder · 1 of 48 ingredients · 28 g

Development potential

Develop Som Sa Peel 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 Som Sa Peel

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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