Hibiscus Extract 5–25% Anthocyanins

Hibiscus extract is prepared from the fleshy red calyces of Hibiscus sabdariffa, the roselle plant grown for tea and color, and not from the petals of the ornamental hibiscus. Ethanol extraction takes up the pigments and the fruit acids of the calyx, and the liquor is dried to a purple red powder.

The grade range is 5–25% anthocyanins by UV with the pH differential method, and the primary grade is the 25% end. The powder is 80 mesh and water soluble. The 5% grade suits tea-style blends and drink powders, while the 25% grade carries a higher pigment load for capsules and tablets.

SKU: BOT-STX-0053 Category: Standardized Extracts Tags: Anthocyanins, Ethanol Extracted, Flower, Gummies & Chews, Hibiscus, Polyphenols, Standardized Extracts

Anthocyanin Standardization & Grades

Anthocyanins are the water-soluble pigments that give the calyx its deep red color. Roselle carries them mainly as delphinidin and cyanidin glycosides in which the sugar is sambubiose, a two-sugar unit that is a feature of the plant. The calyx also holds organic acids, including hibiscus acid, and phenolic acids such as protocatechuic acid. The botanical entity is Hibiscus sabdariffa L., a plant of the Malvaceae, and the part used is the calyx of the flower, which is the red, fleshy structure around the seed pod.

Grade	Assay & Method	Where It Fits
5% Anthocyanins	UV, pH differential	Tea-style blends and drink powders
25% Anthocyanins	UV, pH differential	Capsules and tablets with small fill

For hibiscus, for hibiscus, the two grades differ by a factor of five. For hibiscus, the 25% grade is a pigment concentrate that supplies a defined load from a small fill. The 5% grade holds more of the fruit acids and sugars of the calyx, so hibiscus extract at this level has a tart, cranberry-like flavor and suits tea-style blends and drink powders. The calyx is also supplied as a 10:1 ratio extract, the Hibiscus (Roselle) Extract Powder, as a milled calyx, the Hibiscus Flower Powder, and the simple phenolic acid is listed as 3,4-Dihydroxybenzoic Acid 98%. Ornamental hibiscus species are different plants. Hibiscus extract at 25% is the more concentrated of the two grades, and hibiscus extract at 5% is the fuller one. The calyces swell and turn red as the fruit matures.

Anthocyanin Analysis & Purity Risks

For hibiscus, for hibiscus, UV with the pH differential method gives the anthocyanin total. The sample is read at two pH values, one colored and one colorless for the pigment. The difference in absorbance is converted to an amount on a stated reference pigment. For hibiscus, this counts monomeric anthocyanins only. For hibiscus, polymeric and degraded pigments are not counted, and the figure cannot be converted into an HPLC result for individual pigments.

The reference pigment matters because roselle pigments are sambubiosides, which differ in size from the common glucoside references. A different reference or molar mass gives a different percentage for the same extract, so a figure is comparable only with one that uses the same reference and the same pH conditions.

HPLC is used beside the UV total to show the pattern. A roselle chromatogram has delphinidin sambubioside as the largest peak, followed by cyanidin sambubioside, and the dominance of these two identifies the calyx. Protocatechuic acid is a breakdown product of anthocyanins and also occurs in many plants, so it is not a marker of roselle by itself.

Purity risks follow from naming and from the part. Roselle calyces, ornamental hibiscus petals and the seeds are different materials, and the ornamental species have a different pigment profile. A fixed species, the calyx as the part and the pigment pattern are the first identity checks. Pigments shift with pH and fade in light, so storage history also changes the figure.

Typical Specifications

Specification Item	Product Information
Latin Name	Hibiscus sabdariffa
Plant Part	Flower
Processing	Ethanol Extraction
Compound Class	Anthocyanins, Flavonoids, Polyphenols
Common Name	Hibiscus, Roselle Calyx
Ingredient Type	Standardized Extract
Marker Compound(s)	Anthocyanins (delphinidin and cyanidin sambubiosides)
Primary Grade	25% Anthocyanins (UV, pH differential)
Available Grades	5% · 25% Anthocyanins (UV, pH differential)
Appearance	Purple Red 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

25% Grade for Compact Capsules

The 25% grade delivers a calyx pigment load from a small fill, which suits capsules and tablets. The acidic, purple red powder is hygroscopic, so fill in a dry room, use an opaque bottle and keep a desiccant in the closure.

25% Grade in Tablet Blends

Tablets of the 25% grade need a dry binder and a moisture-tolerant filler, because the acidic, soluble powder softens compacts under humidity. Protect the tablet from light, and keep the blend away from alkaline fillers, which turn the red to blue-gray.

5% Grade in Tea-Style Blends

Tea-style blends use the 5% grade with rose hip, citrus peel or mint. The extract dissolves in a hot cup to a clear ruby infusion with a tart, cranberry-like taste, and it replaces the pieces of calyx without leaving sediment.

5% Grade in Drink Powders

Drink powders carry the 5% grade with fruit flavors and a sweetener that balances its acidity. The solution is red at low pH, and the shade shifts toward violet as the pH rises, so test the color in the finished drink.

5% Grade in Gummy Premixes

Gummy premixes accept the 5% grade for color and a tart note. The natural acids lower the pH and can weaken the set of a pectin gel, so add the powder after the main cook and adjust the buffer before scale-up.

25% Grade in Stick Packs

For hibiscus, for hibiscus, stick packs carry the 25% grade at a small fill with an acid and a sweet carrier. For hibiscus, seal the packs in light- and moisture-barrier film, because the soluble pigment powder clumps at the seal and fades in clear film.

Technical & Quality Considerations

For hibiscus, for hibiscus, the extract is a purple red powder with a faint fruity odor and a sharply tart taste. It is water soluble, and solutions are bright red at low pH and shift to violet and blue-gray as the pH rises. Anthocyanins are sensitive to heat, light, oxygen and metal ions, so hibiscus extract fades in clear packs and in systems held hot for long periods. The natural acids make the powder acidic in solution.

The acids and sugars also make the powder hygroscopic, so it cakes and stains equipment if humid air reaches it. The acidity can attack uncoated carbon steel. Check the contact materials of hoppers and screws.

Compare each lot with a retained sample for color, acidity and the pigment pattern. The deep red pigment stains mixers and hoppers, so schedule clean-down time after a hibiscus run, and store the powder in an opaque, sealed container in a cool place to keep its shade through shelf life. A retained sample from each lot, tested again near the end of shelf life, shows whether the packaging holds the pigment figure and the red shade together.

Hibiscus extract is strongly acidic and tart in solution, so test the pH of the finished drink, and expect the shade to be a bright red at low pH and a dull violet where buffers or minerals raise it.

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.