Ajwain seeds (Trachyspermum ammi), known internationally as carom seeds or Bishop's weed, are small, oval, ridged fruits celebrated for their intense aroma, pungent bite, and high thymol content. Aggregated from dedicated farm tracts across Gujarat and Rajasthan into Unjha’s trading yard, export-grade ajwain is graded on Sortex colour purity (98% to 99.5%), volatile oil concentration (2.5% to 4.5%), and absence of field debris.
The Chemistry of Indian Ajwain: High Natural Thymol
The culinary and medicinal punch of ajwain originates in its volatile oil glands. While related to cumin and fennel, ajwain shares a dominant chemical compound with culinary thyme: thymol (35% to 60% of its volatile fraction), accompanied by gamma-terpinene, p-cymene, and beta-pinene.
Thymol imparts powerful antimicrobial, antifungal, and digestive properties. Global pharmaceutical laboratories and essential oil extractors demand ajwain with verified oil percentages above 3.0% v/w. At Shubham Agro, our procurement focuses on fresh-harvest winter arrivals that preserve these volatile aromatics without weathering.
Because carom seeds are minuscule (approximately 2 mm in length), separating weed seeds, sand granules, and dust requires fine multi-deck vibro-sifters and high-frequency optical sorters.
Commercial Export Grades Compared
| Parameter | Machine Clean (98%) | Sortex Clean (99.0%) | Super Clean (99.5%) |
|---|---|---|---|
| Purity (by weight) | Min 98.0% | Min 99.0% | Min 99.5% |
| Foreign Matter | Max 2.0% | Max 1.0% | Max 0.5% (Zero mud/stone) |
| Moisture Content | Max 10.0% | Max 9.5% | Max 9.0% |
| Volatile Oil Content | Min 2.0% v/w | Min 2.5% v/w | Min 3.0% – 4.5% v/w |
| Total Ash | Max 9.5% | Max 8.5% | Max 7.5% |
| Acid Insoluble Ash | Max 2.0% | Max 1.2% | Max 0.8% |
Destoning & Optical Sortex Refining
Because ajwain plants grow close to the ground, raw farm gate lots routinely contain tiny stones of identical size and density to the seed. Standard mechanical sieves cannot eliminate these stones. Shubham Agro operates:
- Dry Fluidized Gravity Destoners: Air-suspension vibration tables that lift light seeds while heavier stone particles walk up the deck to discharge.
- Trichromatic High-Resolution Optical Sorters: Rejects darkened, diseased, and insect-damaged seeds, delivering a vibrant, uniform greyish-green to brown lot.
- Rare Earth Magnetic Traps: Eliminates microscopic ferrous particles before final bagging.
Export Packaging & Aroma Preservation
Ajwain’s high volatile thymol content can dissipate if packed in breathable, unlined bags stored in hot shipping environments. We offer:
- Multi-Wall Paper Sacks (25 kg): With continuous polyethylene inner heat seals.
- PP Woven Bags (25 kg / 50 kg): Heavy gauge outer woven poly with inner liner.
- Vacuum-Sealed Master Cartons (20 kg): For premium retail repacking brands in Europe and North America.
Frequently Asked Questions (FAQ)
Ajwain is botanically known as Trachyspermum ammi (or Carum copticum). Indian customs classifies ajwain under HS Code 0910 99 14.
Thymol content is quantified by steam distillation (Clevenger apparatus) to extract total essential oil, followed by Gas Chromatography (GC-FID / GC-MS) to measure exact thymol percentage.
Yes. Shubham Agro frequently executes consolidated shipments combining 3 to 5 tons of ajwain with cumin, fennel, and sesame seeds in a single 20ft container.
Properly packed in sealed poly-lined bags stored under 22°C and 60% relative humidity, whole ajwain retains high aroma and thymol potency for up to 24 months.
Explore Product Specs: Visit our Ajwain Product Page to review specifications and order certified samples.
