Devil’s Claw Extract 2.5–5% Harpagoside

The secondary storage root of Harpagophytum procumbens, the devil’s claw of the southern African savanna, is the only part used in this extract, and the primary root, leaf and the fruit with its hooked claws are excluded. Ethanol extraction takes up the iridoid glycosides of the tuber, and the concentrate is dried to a light brown powder.

Harpagoside is measured by HPLC, with a primary grade of 5% and a lower grade of 2.5%. The powder is 80 mesh and water soluble. The 5% grade fits capsules and tablets that need a small fill, while the 2.5% grade fits drink powders and blends in which the tuber matrix is wanted.

SKU: BOT-STX-0140 Category: Standardized Extracts Tags: Devil's Claw, Dry Blends & Premixes, Ethanol Extracted, Root & Rhizome, Standardized Extracts, Water Soluble

Harpagoside Standardization & Grades

Harpagoside is an iridoid glycoside esterified with cinnamic acid, and it is the characteristic compound of the devil’s claw tuber. Harpagide and procumbide, two related iridoids without the cinnamoyl group, accompany it. The botanical entity is Harpagophytum procumbens (Burch.) DC. ex Meisn., and the extract is standardized to harpagoside because it is the defining compound of the species and the one used in pharmacopoeial identity and assay statements.

Grade	Assay & Method	Where It Fits
2.5% Harpagoside	HPLC	Drink powders and blends, higher inclusion
5% Harpagoside	HPLC	Capsules and tablets, small fill weight

Grade choice follows dose and fill weight. The 5% grade carries twice the harpagoside of the 2.5% grade per gram, so a capsule reaches its target with less powder, while the 2.5% grade is bulkier and keeps more of the tuber’s sugars and bitter principles. Devil’s claw is also supplied as a 10:1 ratio extract with no marker figure, the Devil’s Claw Extract Powder, as milled tuber, the Devil’s Claw Root Powder, and as a single compound, Harpagoside 98%. The standardized extract is the row to use when a harpagoside figure has to appear in the specification.

Harpagoside Analysis & Purity Risks

HPLC separates harpagoside from harpagide and procumbide on a reversed-phase column and quantifies the peak against a reference standard, with UV detection at a wavelength where the cinnamoyl chromophore absorbs strongly. The result is harpagoside specifically. A UV total would count other cinnamates and phenolics, and neither a UV figure nor a gravimetric iridoid figure can be converted into the HPLC value.

For identity, the fingerprint of the tuber is read beside harpagoside. Harpagide and procumbide appear as neighboring peaks, and the balance between the esterified and unesterified iridoids shows whether the material is fresh tuber or a stale or hydrolyzed lot. The pharmacopoeial identity statement also relies on this pattern.

Purity risks follow from the botanical group. The related species Harpagophytum zeyheri is also harvested and traded as devil’s claw, but it carries less harpagoside, and pharmacopoeial monographs accept only H. procumbens. The stated species and the stated secondary-root part are therefore part of the identity. Harpagoside is also unstable, and a poorly dried or poorly stored lot loses it, so the figure of the starting material is checked.

Sample preparation uses a polar solvent at moderate temperature, because the ester bond of harpagoside hydrolyzes under strong acid, strong base and prolonged heat. Samples are kept neutral or mildly acidic and injected promptly.

Raw material handling also matters. The tubers are sliced and sun-dried, and slow or wet drying degrades harpagoside and darkens the slices. A well-dried lot is firm, pale to brown and bitter, whereas a damp lot shows mold.

Typical Specifications

Specification Item	Product Information
Latin Name	Harpagophytum procumbens
Plant Part	Root & Rhizome
Processing	Ethanol Extraction
Compound Class	Iridoids, Terpenoids
Common Name	Devil’s Claw, Grapple Plant
Ingredient Type	Standardized Extract
Marker Compound(s)	Harpagoside
Primary Grade	5% Harpagoside (HPLC)
Available Grades	2.5% · 5% Harpagoside (HPLC)
Appearance	Light Brown powder
Solubility / Dispersibility	Water Soluble
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

Applications by Grade

5% Grade for Compact Capsules

The 5% grade of devil’s claw extract reaches a harpagoside target in a small fill, which suits compact capsules. The powder is hygroscopic and intensely bitter, so fill in a dry room and let the shell carry the taste.

2.5% Grade in Tablet Blends

Tablets of the 2.5% grade need a dry binder and a glidant, because the sugar-rich powder softens in humid air. A film coat limits moisture pickup and covers the strong bitterness, and hardness should be checked after storage. A tight closure with a desiccant protects the tablets from humidity during shelf life.

2.5% Grade in Drink Powders

Because the extract is water soluble, the 2.5% grade dissolves into a clear to slightly hazy brown cup. The taste is very bitter, so ginger, citrus or spiced bases with a sweetener are needed, and cool water gives the cleanest result.

5% Grade in Sachet Dilutions

Sachets of the 5% grade call for stepwise dilution with a bulking carrier so the filler can weigh an accurate dose. Foil laminate with low moisture transmission keeps the powder free-flowing through the full shelf life of the product.

2.5% Grade in Instant Tea-Style Blends

Instant blends in stick format use the 2.5% grade with warming spices that match the bitter, earthy character. The extract dissolves readily, and a short stir in warm water is enough to reach a uniform cup.

5% Grade for Contract Blending

Contract blenders place the 5% grade in multi-ingredient powders where a harpagoside target has to be met. Bitterness carries across adjacent runs, so dedicated scoops and a purge of the line protect milder products that follow. Keep the clean-down record with the batch file.

Technical & Quality Considerations

Devil’s claw extract is a light brown powder with a faint, earthy odor and an intensely bitter taste. It is water soluble, giving a clear to slightly hazy brown solution. Harpagoside itself is only moderately water soluble, and the surrounding sugars and polar compounds of the tuber help it dissolve.

Harpagoside is the stability-limiting compound. It hydrolyzes in acidic solution and on heating, forming harpagide and cinnamic acid, so low-pH beverages and hot-fill or retort processes lower the figure markedly. Neutral to mildly acidic bases and cool processing preserve it. A trial at the target process and pH, with a retained sample for comparison, is the practical way to check the loss.

Scale-up starts with a sieving step and a premix with part of the carrier, followed by a weight check on the first fills. The sugar-rich powder absorbs water readily and cakes in humid air, so devil’s claw extract belongs in a dry room, in sealed drums with desiccant liners, stored cool and dark.

Co-ingredients can change how the extract behaves, so a short trial is sensible. Acidic ingredients such as citric acid and vitamin C lower the pH of a blend over time, and moisture from hygroscopic components speeds harpagoside loss, so a stability study at elevated temperature shows early whether a combination is sound.

Taste management is the other practical constraint. The tuber is among the most bitter botanical materials in common use, and the bitterness carries through to the finished product at very low inclusion. Capsules and coated tablets avoid the issue entirely, while a drink needs a layered approach: acid and salt to suppress bitterness, a sweetener with a clean profile, and a flavor strong enough to compete. A taste panel on the final recipe is worth more than a calculation here.

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.