Radix Rehmanniae Extract Powder

Radix Rehmanniae extract starts from the root of Rehmannia glutinosa, the thick, yellow-brown storage root of Chinese foxglove known as di huang, with the leaf and flower excluded. Water extraction concentrates the soluble root fraction, and the liquor is dried into a light brown powder that disperses in water.

The extract is supplied at a 10:1 ratio with no marker percentage and is milled to 80 mesh. It is the raw root, and the steamed, darker prepared root is listed as its own extract. The root is rich in sugars and glycosides, which makes a sweet, sticky powder.

SKU: BOT-BEX-0535 Category: Botanical Extracts Tags: Bars & Bakery, Gummies & Chews, Plant Extracts, Rehmannia, Root & Rhizome, Water Extracted

Rehmannia glutinosa Root Source & Identity

The botanical entity is Rehmannia glutinosa (Gaertn.) Libosch. ex Fisch. & C.A.Mey., a low, hairy perennial of the Rehmanniaceae with a rosette of wrinkled leaves and purple-red tubular flowers. The part used is the root. The Latin pharmacopoeial name Radix Rehmanniae denotes the dried root in its raw form. Leaf and flower are not part of this Radix Rehmanniae extract.

The root is processed in several ways. Fresh, dried raw and steamed prepared roots are different materials with different colors and compositions, and the steamed root is far darker. The raw root holds iridoid glycosides such as catalpol and rehmannioside, phenylethanoid glycosides, oligosaccharides and polysaccharides, named here only as families.

Raw Rehmannia vs Prepared and Marker Forms

Form	What It Is	Choose It When
10:1 Raw Root Extract	Water-extracted, concentrated Rehmannia glutinosa dried root	The unprocessed root is specified
Prepared Rehmannia Root Extract Powder	Ratio extract of the steamed, prepared root	The prepared root is specified
Rehmannia Glutinosa Extract 5–30% Iridoid Glycosides	Root extract defined by an iridoid glycoside range	A stated iridoid range is required
Catalpol 98%	Purified catalpol, a single iridoid found in the root	A single-compound ingredient is required

The four entries share one plant. The first is the dried raw root at a plain 10:1 ratio. The prepared root extract comes from a steamed material that is darker and chemically changed, with sugars and iridoids transformed by heating. The defined grade carries an iridoid range, and the purified compound catalpol is offered as a single-compound ingredient. A ratio gives concentration against the starting root and reports no iridoid figure, so the processing state named on the form decides which material arrives. Radix Rehmanniae extract is the raw-root ingredient, and the name Radix Rehmanniae on a form separates it from the steamed prepared root.

Typical Specifications

Specification Item	Product Information
Latin Name	Rehmannia glutinosa
Plant Part	Root & Rhizome
Processing	Water Extraction
Common Name	Dried Rehmannia Root
Ingredient Type	Ratio Extract
Extract Ratio	10:1
Appearance	Light brown powder
Solubility / Dispersibility	Water Dispersible
Quality Parameters
Moisture (LOD)	≤5.0%
Total Ash	≤5.0%
Particle Size	80 mesh
Heavy Metals	Lead ≤2 ppm · Arsenic ≤1 ppm · Cadmium ≤1 ppm · Mercury ≤0.1 ppm
Microbiology	TPC ≤1,000 cfu/g · Yeast & Mold ≤100 cfu/g · E. coli Negative · Salmonella Negative/25 g
Shelf Life	24 months in unopened original packaging, cool and dry storage

Application Areas

Capsules for Sticky Sweet Roots

Radix Rehmanniae extract fills into capsules as a light brown powder. Its sugars and oligosaccharides make it sticky and hygroscopic, so a dry filling room and a flow aid are essential, and fill weights are tracked at the start and end of each run.

Tablets That Resist Moisture

Microcrystalline cellulose with a disintegrant forms the base for the Radix Rehmanniae extract tablet, and a moisture barrier coat follows. The sugar-rich powder softens compressed matrices in humid air, so compression runs in a controlled room, and a film coat protects the tablet from picking up water during storage.

Sweet Tea-Style Powders

Instant tea-style blends use the root extract as a naturally sweet, tan base with a faint caramel-like depth. Red date, ginger and osmanthus-style flavors suit it, and a carrier keeps the dose even between sachets.

Powder Sticks in Barrier Laminate

Sticks pair the extract with flavor and a reduced sweetener load, because the root contributes sweetness itself. Sugar-rich extracts cake in humid storage, so the premix is dried and seals are checked for moisture on every run.

Dark Chewy Gummies

Cooked gummies take the root extract late in the base, with cola, date or dark berry flavors that match the tint. The soluble sugars change the cooked mass, so sugar and glucose syrup are adjusted in trials.

Formulation Notes

Radix Rehmanniae extract is a light brown powder with a faint, sweet, malt-like aroma and a mildly sweet, slightly bitter taste. In water it forms a hazy tan to brown liquid with a little sediment. The natural sweetness is a distinctive trait of the raw root.

The sugar and glycoside content makes the powder strongly hygroscopic. Weigh the powder in a dry room, with the liner closed after every draw and the opened pack kept away from heat and light. The powder darkens through browning reactions as it ages, and surface clumping is the first sign of moisture pickup.

Blend the root extract with a flow aid and pass it through a screen into the bulk. For drinks, the powder is stirred into dry sugar before liquid is added, which stops it from forming sticky lumps. Pilot lots show how the tan tint develops in warm storage.

Packaging & Commercial Supply

Essencefield supports product evaluation, formulation trials, commercial orders, and ongoing ingredient supply. Packaging, storage, and shipping arrangements are determined by product characteristics, order quantity, stability requirements, and destination-market needs.

Supply Item	General Information
Sample	Available upon request for formulation, testing, and supplier evaluation
Order Quantities	100 g · 1 kg · 5 kg · 25 kg · 100 kg · 500 kg · Bulk
Sample Lead Time	Typically 5–7 days after sample confirmation
Production Lead Time	Typically 15–30 days after order and specification confirmation
Packaging	Suitable protective inner packaging with bags, cartons, drums, or other appropriate outer packaging
Storage	Store in tightly sealed, suitable protective packaging in a cool, dry environment. Protect from moisture, heat, and direct sunlight. Specific storage conditions follow the approved product specification.
Documentation	COA · Product Specification · TDS · SDS · Applicable declarations (as applicable)

Final order quantities, lead times, packaging, documentation, and shipping arrangements are confirmed according to the selected product and commercial requirements.