Why Dipotassium Glycyrrhizate COAs Are Harder to Compare Than They Look: Identity, Assay Basis, Licorice Source, pH and Formulation Fit

Quick Answer

Dipotassium glycyrrhizate is often presented as a straightforward cosmetic raw material: licorice-derived, water-compatible, anti-inflammatory, 98-99% pure and available in kilogram quantities. The difficult part is not finding a page with those words. It is determining what the percentage refers to, whether the document describes the potassium salt or the glycyrrhizic-acid equivalent, and whether the lot can be traced back to the exact product being quoted.

The ingredient also sits at the boundary between a defined chemical species and a botanical supply chain. Dipotassium glycyrrhizate may be isolated from licorice, but a licorice extract, a standardized glycyrrhizic-acid material and the purified dipotassium salt are not interchangeable simply because they share a plant source. Species, plant part, extraction, purification and counter-ion all affect the evidence package.

For a buyer, the approval question is therefore specific: does this lot match the requested salt identity, assay basis, impurity controls, formulation conditions and intended cosmetic market? A high number on a COA is only one part of that answer.

Start with the Salt Identity, Not the Licorice Story

PubChem lists dipotassium glycyrrhizate under CID 656852 and associates it with CAS 68797-35-3. The compound is the dipotassium salt of glycyrrhizic acid, not a generic licorice extract. The product name, CAS, formula, molecular weight, INCI wording and product code should agree across the listing, quotation, SDS, TDS, specification, sample label and COA.[1]

This is more than a naming exercise. Glycyrrhiza uralensis, G. glabra and G. inflata can appear in licorice supply chains, while extracts may contain glycyrrhizic acid together with flavonoids and other constituents. A material sold as licorice extract 10:1, glycyrrhizic acid, dipotassium glycyrrhizate or potassium glycyrrhizinate needs a clear material definition before price and assay comparisons are meaningful.

• Controlled name and synonyms: dipotassium glycyrrhizate, dipotassium glycyrrhizinate or the supplier's defined name.
• CAS 68797-35-3, reconciled across commercial and technical documents.
• Molecular formula and molecular-weight basis, including whether the supplier is describing a hydrate or another form.
• INCI name and intended cosmetic function, kept separate from oral, pharmaceutical or medical positioning.
• Product code, manufacturer or legal seller, batch number and document revision.
• Physical form and appearance tied to the actual grade, not copied from a generic herbal-extract template.

A CAS or formula conflict is a hold point. Do not infer that the material is correct because the product title looks familiar. Ask the supplier to explain the discrepancy and issue a controlled document before approving the candidate.

The Percentage May Describe Different Things

A listing that says 99% purity does not necessarily mean 99% dipotassium glycyrrhizate on the same basis used by another supplier. The percentage may represent HPLC area, assay against a reference standard, glycyrrhizic-acid equivalent, dry-basis content or a supplier-defined release field. Those values should not be placed in one comparison column without their analytical definitions.

A useful RFQ question is not simply Can you provide a 99% COA? It is: Please state whether the result is dipotassium glycyrrhizate or glycyrrhizic-acid equivalent, identify the reference standard and calculation basis, and provide the lot result with the method. That question exposes whether two attractive percentages are actually comparable.

The literature also supports caution around analytical method choice. Reviews of licorice analysis describe HPLC, HPTLC, LC-MS and related methods for identification and quantification of glycyrrhizic acid and other constituents. A method that is suitable for a licorice extract fingerprint is not automatically a complete release method for a purified salt.[3,4]

Do Not Confuse Purified Salt with Botanical Standardization

A purified dipotassium salt should have a defined chemical identity and salt-specific release criteria. A standardized licorice extract may instead be controlled by a marker percentage while retaining multiple native constituents. Both can be legitimate materials for different products; they answer different formulation and regulatory questions.

Ask where the material sits on that spectrum. Natural, from licorice root, herbal extract and cosmetic grade are descriptive terms, not substitutes for a manufacturing description. For a botanical-derived salt, the source information can still matter because it affects traceability, pesticide and heavy-metal risk, solvent residues, and the plausibility of the supplier's process description.

• Botanical source: species, plant part and country or region when the supplier claims a plant origin.
• Process: extraction, purification, neutralization or salt-formation steps at the level the supplier can document.
• Residual profile: solvents, pesticides, heavy metals and microbiological controls appropriate to the material.
• Marker relationship: whether the reported glycyrrhizic-acid value is a marker for an extract or a result for the purified salt.
• Change control: notification if the botanical source, extraction site, purification route or analytical method changes.

The buyer should not reject a candidate merely because a marketplace page is brief. The correct response is to convert the missing fields into RFQ questions and decide whether the answers are material to the product risk.

What Safety Evidence Does—and Does Not—Tell You

The Cosmetic Ingredient Review Expert Panel assessed glycyrrhetinic acid and related glycyrrhizic-acid salts and esters, including dipotassium glycyrrhizate. The report is useful context for cosmetic safety assessment, but it is not a certificate for a particular commercial lot and it does not replace market-specific compliance review.[2]

The report also illustrates why route and concentration matter. Evidence involving oral exposure, systemic metabolism, animal studies, in-vitro tests and topical cosmetic use should not be mixed into one simple safe statement. For a cosmetic buyer, a finished-product claim still depends on the formula, concentration, exposure pattern, target market and substantiation package.

The CIR assessment reported a maximum concentration of use for dipotassium glycyrrhizate in the reviewed cosmetic-use context. That figure should not be copied into a universal formulation instruction or treated as a substitute for the current requirements of the target market. Record the source, date, ingredient identity and intended use before using any concentration limit in development work.

pH and Solubility Must Be Tested in the Actual Base

Dipotassium glycyrrhizate is commonly selected when a water-compatible licorice-derived material is wanted, but water soluble does not describe every formula condition. Ionic strength, pH, temperature, concentration, co-solvents, salts, surfactants and other charged ingredients can change clarity, viscosity or precipitation behaviour.

The practical test is not a generic beaker observation. Prepare the intended concentration in the intended vehicle, record the order of addition and measure the result after equilibration. If the formula is acidic, buffered or electrolyte-rich, do not assume that a clear stock solution will remain clear after all ingredients are added.

• Define the target concentration, vehicle, pH and addition temperature before requesting supplier solubility data.
• Record water quality, mixing energy, time, order of addition and equilibration period.
• Check clarity, precipitation, colour, odour, pH drift and viscosity in the complete base.
• Test compatibility with acids, preservatives, salts, botanical extracts, chelators and packaging materials used in the product.
• If the material is used as a soothing or anti-inflammatory active, keep raw-material solubility separate from finished-formula performance.

Research on glycyrrhizinate physicochemical behaviour describes pH-dependent association and micelle-related behaviour. That type of evidence is useful for understanding why formula conditions matter, but it does not provide a universal pH window for every commercial grade.[5]

Read the COA as a Release Document

A COA marked HPLC tested or 99% is not enough to release a lot. First determine whether the document is a template, a representative sample report, an internal release sheet or a lot-specific certificate. Then match it to the product code, batch, manufacturing date and supplier identity.

• Identity: name, CAS, formula and product code match the quotation and sample label.
• Assay: dipotassium glycyrrhizate or glycyrrhizic-acid equivalent is explicitly defined.
• Method: HPLC, qNMR or another method is named with standard, basis and acceptance limit.
• Related substances: relevant glycyrrhizic-acid forms, glycyrrhetinic acid or other markers are addressed where applicable.
• Physical quality: appearance, odour, moisture or loss on drying, pH of a defined solution and solubility observation.
• Contaminants: residual solvents, pesticides, heavy metals and microbiology are evaluated for the intended use.
• Traceability: lot number, production date, retest or expiry, storage condition and document issuer are present.
• Release logic: the supplier explains out-of-specification handling and customer notification.

A qNMR paper on dipotassium glycyrrhizinate is particularly useful because it demonstrates that purity assessment can be approached with a quantitative NMR method under defined conditions. It does not mean that every supplier should report qNMR, but it does show why HPLC 99% and purity should not be treated as self-explanatory words.[6] Do not build a universal specification by copying one Alibaba PDF. Define which attributes matter for the intended formula and market, then determine whether the supplier documents and incoming testing close those risks.

No supplier-level sourcing link is inserted without an exact supplier homepage route and separate landing verification. A supplier link must identify the intended supplier-level entry; it must not be inferred from a product page or a generic store route. Product-level sourcing link and supplier-level sourcing link remain different commercial paths.

Current Sourcing Candidates

The following product-level routes were identified as screening candidates from current Alibaba search results. Listing fields are supplier or marketplace claims, not independent quality findings. The sourcing link routes are generated from the listed Product IDs and remain unverified until their landing identity is checked.

Stage the Approval Instead of Accepting the Headline

1. Identity gate: CAS 68797-35-3, chemical name, formula, product code and sample label agree.
2. Assay gate: the result states whether it is salt content or glycyrrhizic-acid equivalent and names the method.
3. Source gate: the supplier explains botanical source and purification status when plant origin is claimed.
4. Formulation gate: the exact sample remains suitable in the intended vehicle, pH and ionic environment.
5. Documentation gate: the lot COA, TDS, SDS and compliance files are consistent and traceable.
6. Commercial gate: MOQ, package, lead time, change notification and transaction route are confirmed separately.
7. Status gate: record quotation, sample evaluation or production approval; do not let a marketplace page silently advance the status.

Supplier operating history can be considered with responsiveness, document control, sample quality, traceability and repeat-supply capability. It is a review signal, not a rigid seven- or eight-year pass/fail rule. A long marketplace history still does not prove the exact salt or lot; a newer supplier can proceed to sample review if the evidence package is coherent and the project risk is manageable.

Buyer Checklist

1. CAS 68797-35-3 and the chemical name are consistent across all documents.
2. The assay basis distinguishes dipotassium glycyrrhizate from glycyrrhizic-acid equivalent.
3. HPLC or qNMR information is sufficient to interpret the reported result.
4. Botanical source, purification route and contaminant controls match the intended use.
5. The lot COA is linked to the quoted product and batch.
6. Solubility and pH behaviour are checked in the actual formula rather than a generic stock solution.
7. Finished-product soothing or anti-inflammatory claims are kept separate from raw-material identity and assay.
8. Unresolved gaps are recorded as RFQ questions or incoming-QC requirements.
9. A product listing and a supplier storefront are different routes.
10. Technical approval is recorded separately from commercial and affiliate-link status.

Dipotassium glycyrrhizate can be a useful cosmetic ingredient, but the buyer does not approve a licorice story or a 99% headline. The buyer approves a defined salt identity, an interpretable assay, a traceable lot, a workable formula and a claim boundary appropriate to the target market. Once those conditions are clear, the COA becomes a decision document rather than a decorative attachment.

References

1. National Center for Biotechnology Information. PubChem Compound Summary: Dipotassium Glycyrrhizate, CID 656852. https://pubchem.ncbi.nlm.nih.gov/compound/Glycyrrhizic-acid-dipotassium
2. Cosmetic Ingredient Review Expert Panel. Final report on the safety assessment of glycyrrhizic acid and related salts and esters. International Journal of Toxicology. 2007;26 Suppl 2:79-112. https://pubmed.ncbi.nlm.nih.gov/17613133/
3. Li W, et al. Chemical analysis of the Chinese herbal medicine licorice (Gan-Cao): An update review. Journal of Ethnopharmacology. 2022. https://pubmed.ncbi.nlm.nih.gov/36067839/
4. Zhang Q, et al. Recent advances in chemical analysis of licorice (Gan-Cao). Fitoterapia. 2020. https://pubmed.ncbi.nlm.nih.gov/33309652/
5. Studies on Physicochemical Behaviors of Glycyrrhizinate. Journal of Oleo Science. 1998;47(11):1197-1204. https://www.jstage.jst.go.jp/article/jos1996/47/11/47_11_1197/_article
6. Quantitative 1H Nuclear Magnetic Resonance Method for Assessing the Purity of Dipotassium Glycyrrhizinate. Molecules. 2021;26(12):3549. https://pmc.ncbi.nlm.nih.gov/articles/PMC8230393/