Churna is finely powdered herb or herb blend prepared to classical Ayurvedic specifications, produced through drying.
Churna is the Ayurvedic category for finely powdered herbs or herb blends prepared according to classical formulation texts. Both single herb churna and compound churna are produced by drying, cleaning and milling raw plant material to a specified mesh size, with quality checks at each stage to preserve the active constituents that determine the powder's therapeutic character.
The Sanskrit term churna means powder. In classical Ayurveda, churna refers specifically to medicinal powders prepared according to formulas documented in authoritative texts such as the Sharangdhar Samhita, the Bhaishajya Ratnavali and the Ashtanga Hridayam. These texts specify the component herbs, their proportions, any preliminary processing required and the fineness of the final powder. A churna prepared to these specifications is a Shastrayoga, a classically authorised formulation, as distinct from a proprietary blend developed outside classical literature.
Two broad types exist in commercial Ayurvedic supply. Single herb churna is the dried and powdered form of one plant part, such as Amla (Emblica officinalis) fruit, Triphala component herbs or Ashwagandha (Withania somnifera) root. Compound churna blends multiple herbs in classical ratios, with Trikatu (ginger, long pepper and black pepper) and Hingwashtak churna being well-known examples. Both types pass through broadly similar processing steps, though compound formulations require blending and additional in-process homogeneity checks.
Raw herb quality determines the quality of the finished churna, and it cannot be recovered through processing. Herb selection involves checking botanical identity, moisture content, the absence of adulteration with related species, and conformance to the organoleptic standards described in the Ayurvedic Pharmacopoeia of India. Ash value and extractive value tests provide further confirmation that the material is within acceptable pharmacopoeial limits.
Once accepted, raw herbs undergo cleaning to remove extraneous matter, damaged plant parts and dust. Sorting is done by hand or by mechanical means depending on the herb. Some hard materials such as rhizomes and roots require cutting or slicing before the drying step. The objective is uniform particle size entering the dryer, which promotes even drying without case-hardening the outer surface.
Moisture control is central to the shelf life and safety of churna. The drying step reduces moisture to a level at which microbial proliferation and enzymatic degradation are inhibited, typically measured by the loss on drying test against a pharmacopoeial specification. Traditional sun-drying is still used for some materials, but a GMP certified manufacturer applies controlled-temperature drying to achieve reproducible results across batches.
The drying temperature is selected for each herb with care. Heat-sensitive aromatic herbs that contain volatile oils require low-temperature drying to avoid loss of the compounds that define their character. Buyers of single herb churna in bulk should ask what drying method is used and what the typical loss on drying value is for the finished powder, as this reflects consistency from batch to batch.
Milling converts the dried herb into powder of a defined particle size. The classical texts specify "fine powder" for churna without quantifying a mesh number, so modern GMP manufacturers follow the Ayurvedic Pharmacopoeia of India, which typically specifies sieve number 40 or finer (below 425 micrometres) for most churna products. Coarser powders may be acceptable for certain external applications but not for oral forms intended to disperse quickly.
Milling equipment ranges from hammer mills and pin mills to multi-stage micronisers for the finest grades. The choice affects not only particle size but also the heat generated during milling, which matters for aromatic and resin-bearing materials. After milling, the powder is sieved to confirm the particle size specification is met. Oversized material is returned for further milling; undersized or very fine dust may be separated depending on the specification.
A GMP certified manufacturer applies a documented testing sequence. In-process checks include appearance, colour, odour and particle size at intermediate stages. Finished product tests typically include loss on drying, total ash, acid-insoluble ash, alcohol-soluble extractive, water-soluble extractive, heavy metals (lead, arsenic, mercury and cadmium), microbial limits (total aerobic count, yeast and mould count, absence of specified pathogens) and, where applicable, pesticide residue screening.
These tests align with the Ayurvedic Pharmacopoeia of India and with the import requirements of many overseas markets. A certificate of analysis reporting these parameters should accompany every commercial consignment. Buyers sourcing from a contract manufacturing partner or from a bulk supply operation should request the COA format before placing an order to confirm it covers the parameters their quality team requires.
Bulk churna is typically packed in food-grade HDPE drums or multilayer kraft paper bags with a polyethylene inner liner, depending on the herb's moisture sensitivity and the transportation conditions involved. Hygroscopic powders such as those containing salts or sugars require airtight packaging with desiccant. Aromatic powders require packaging that limits oxygen ingress to preserve volatile components.
Each container is labelled with the herb name, batch number, date of manufacture, best-before date, net weight and the manufacturer's licence numbers. A seal-integrity check prevents tampering. The packaging specification should be agreed between buyer and supplier before the first shipment, particularly for export orders where transit times and humidity conditions vary significantly.
Raasa Ayurveda manufactures a comprehensive range of single herb churna products from its GMP certified Kanpur facility, working to a portfolio of 339 classical formulations built over seventeen years of GMP certified manufacturing. To request a sample of any churna product, review the full formulation list or to discuss bulk and export requirements, contact the team at raasaayurveda@gmail.com or on +91 9415128217. The team responds to all sourcing enquiries within one working day.
Single herb churna is the dried and powdered form of one plant species or plant part, such as Amla or Ashwagandha root. Compound churna blends multiple herbs in ratios specified by classical texts such as the Sharangdhar Samhita. Both types undergo the same core processing steps, but compound formulations require an additional blending and homogeneity verification stage.
The Ayurvedic Pharmacopoeia of India specifies sieve number 40 or finer, corresponding to a particle size below 425 micrometres, for most oral churna preparations. The exact specification varies by herb and intended use. Buyers should confirm the particle size specification with the manufacturer before placing a bulk order, as coarser or finer grades may be required for specific applications.
A thorough COA for churna should cover loss on drying, total ash, acid-insoluble ash, alcohol-soluble and water-soluble extractives, heavy metals (lead, arsenic, mercury, cadmium), microbial limits including total aerobic count and absence of specified pathogens, and pesticide residue where applicable. These parameters align with the Ayurvedic Pharmacopoeia of India and most overseas import requirements.
Bulk churna is typically packed in food-grade HDPE drums or multilayer kraft paper bags with a polyethylene inner liner. Hygroscopic materials are packed with desiccant; aromatic powders require low-oxygen packaging. The exact specification should be agreed before the first shipment, as transit time and humidity conditions vary significantly between domestic and export consignments.
Raasa Ayurveda, 49/72-A, Naughara, Kanpur 208001, Uttar Pradesh, India. Telephone +91 9415128217. Email raasaayurveda@gmail.com.