Buying Climbazole is not only a price-per-kilogram decision. A cosmetic buyer has to confirm raw-material identity, assay, impurity control, solubility behavior, documentation, formulation fit, market restrictions, and the claim pathway for the finished shampoo. A low-cost powder can become an expensive failure if it crystallizes during cooling, loses recoverable assay, destabilizes viscosity, or supports a claim that is not permitted in the target market.
This guide gives procurement teams, scalp-care brands, contract manufacturers, and formulators a practical framework for qualifying ZLEY Climbazole and developing a stable rinse-off shampoo. It separates supplier recommendations from regulatory ceilings and published evidence from formula-specific proof.
Kurze Antwort: Climbazole is an azole antifungal ingredient used in scalp-care formulations, particularly rinse-off shampoos. ZLEY supplies it as a white crystalline powder. It is poorly soluble in water but soluble in ethanol and suitable surfactant solutions. ZLEY’s recommended starting range is 0.1%-0.5%, subject to the final formula, intended claim, safety assessment, efficacy work, and local regulation.
What Is Climbazole and What Does the Evidence Show?
Climbazole, CAS 38083-17-9 and EC 253-775-4, is an antifungal ingredient used to control Malassezia-associated scalp flaking. Its commercial value comes from activity at relatively low formula levels, but performance depends on the complete shampoo system: solubilization, deposition, rinse conditions, contact time, active recovery, and consumer use all matter.
Published results are useful for setting a development hypothesis, not for copying a claim. Three studies illustrate why the formula and study design must stay attached to the result:
| Evidence | Formula and design | Useful buyer takeaway | Limitation |
|---|---|---|---|
| 2001 clinical study | 0.65% Climbazole shampoo, 30 volunteers, four weeks | The study reported successful reductions in dandruff, redness, and itching in 80% of participants, with mild improvement in the remaining 20%. | Small study of one finished formula; it does not prove every Climbazole shampoo will perform the same way. |
| 2011 randomized comparison | 0.5% piroctone olamine plus 0.45% Climbazole compared with 1% zinc pyrithione | The combination formula produced comparable dandruff reduction and higher substantivity in the reported test; 90% of volunteers approved the itching statement after four weeks. | The result belongs to a dual-active finished formula and cannot be assigned to Climbazole alone. |
| 2024 laboratory formulation study | Climbazole and piroctone olamine formulas tested against several Malassezia species | 0.5% Climbazole and selected combinations showed promising inhibition in the tested laboratory method. | In vitro results are not clinical proof, and activity varied by organism and formula. |
The practical conclusion is simple: a supplier should support consistent material quality, while the brand or contract manufacturer must prove stability, safety, and the finished-product claim on its own formula.
Climbazole Raw-Material Specifications Buyers Should Check
A useful supplier specification does more than repeat the INCI name. It defines the tests that protect formulation consistency from lot to lot. Ask for the specification before approving the commercial quote, then compare it with the certificate of analysis for each received batch.
| Qualification item | Was Sie beantragen sollten | Why it matters in production |
|---|---|---|
| Identität | INCI name, CAS 38083-17-9, EC 253-775-4, identification method | Prevents name-only substitution and supports regulatory review. |
| Assay | Numerical limit, validated test method, typical lot data | Controls the true active dose and allows finished-formula mass balance. |
| Impurity profile | Specified related substances, residual solvents, water or loss on drying, and relevant elemental limits | Impurities can affect color, odor, safety assessment, and long-term stability. |
| Körperliche Verfassung | Appearance, particle characteristics where relevant, and handling precautions | Influences wetting time, dissolution, dust control, and batch uniformity. |
| Solubility data | Compatible solvents and surfactant systems, addition guidance, and known incompatibilities | Reduces precipitation and false clarity during a heated batch. |
| Traceability | Batch number, manufacturing site, origin statement, retention sample, and change-control policy | Supports complaint investigation and protects an approved formula from silent changes. |
| Logistics | Packaging, storage, shelf life or retest period, MOQ, lead time, and sample availability | Prevents warehouse aging and unplanned production delays. |
The minimum document package should include a current specification, lot-specific COA, TDS, SDS, storage statement, regulatory status for intended markets, and a written change-notification commitment. For regulated or claim-sensitive projects, also request the analytical method or enough method detail to align incoming and finished-product testing.
How to Formulate a Stable Climbazole Shampoo
1. Define the market and claim before choosing the level
Start with the country list, product type, and exact front-label and online claims. The same Climbazole level may be treated differently when the function is product preservation, scalp appearance support, or an anti-dandruff claim. Regulatory review must therefore happen before the pilot formula is frozen.
2. Screen a practical pilot range
For initial laboratory work, ZLEY recommends 0.1%-0.5%. A useful screening design is 0.1%, 0.3%, and 0.5% in the same base, plus a control without Climbazole. This is a development range, not a universal optimum and not a substitute for local limits. Record active recovery, clarity, viscosity, pH, odor, color, deposition behavior, and performance at every level.
3. Build a clear preblend instead of adding powder to water
Climbazole is poorly soluble in water. Direct addition to the water phase commonly creates floating powder, long mixing times, incomplete dissolution, or crystals that appear after cooling. Prepare a concentrated preblend in an allowed solvent and/or compatible surfactant solution. Use only supplier-supported processing conditions and continue mixing until the concentrate is visibly clear before adding it to the main surfactant phase.
A clear warm batch is not proof of room-temperature solubility. Hold retain samples through complete cooling, inspect after 24 hours and one week, and use magnification or a suitable filtration check when small crystals would be difficult to see.
4. Add it before final viscosity adjustment
Solvent, surfactant, fragrance, electrolyte, conditioning polymer, and active level can all move the viscosity curve. Add the Climbazole preblend before the final salt or rheology adjustment. Then add fragrance and other late-stage materials in the planned production order. Recheck clarity and viscosity after every composition change, because a stable benchmark formula can become unstable after a fragrance or polymer replacement.
5. Verify active recovery in the finished formula
Do not rely only on the weigh sheet. Use a validated extraction and assay method to measure Climbazole in the finished shampoo at time zero and during stability. Low recovery can come from incomplete dissolution, crystallization, adsorption to packaging or test equipment, sampling error, or an unsuitable analytical extraction.
A Reproducible Bench Workflow
- Prepare the base shampoo without Climbazole and confirm its baseline pH, viscosity, appearance, and stability.
- Make the Climbazole preblend using the approved solvent/surfactant package and supplier-supported temperature window.
- Add the clear preblend to the main surfactant phase under controlled mixing. Record temperature, mixing time, and order of addition.
- Complete the formula, then adjust pH and viscosity only after all active, fragrance, conditioning, and electrolyte inputs are present.
- Measure initial active recovery from top, middle, and bottom samples when scale-up uniformity is a concern.
- Fill the intended packaging and begin accelerated, cycling, and real-time stability alongside the bulk retain.
- Lock the master process only after three representative pilot or scale-up batches meet the same acceptance criteria.
ZLEY’s formulation support can help teams translate the raw-material data into a practical first-pass laboratory design, but the final formula owner remains responsible for validation and market compliance.
Common Failure Modes and Corrective Actions
| Observed problem | Mögliche Ursache | Korrekturmaßnahme |
|---|---|---|
| Crystals after cooling | Insufficient solvent capacity, incomplete preblend, or solubility lost as temperature falls | Rebuild the solvent/surfactant balance, reduce the level if appropriate, and inspect after a defined cool-down hold. |
| Cloudiness after fragrance addition | Fragrance competes for solubilization capacity or shifts the surfactant phase | Screen fragrance variants and solubilizer levels in a controlled matrix, not one variable at a time without a control. |
| Viscosity collapse | Solvent, electrolyte, or active preblend changed the salt curve or polymer hydration | Move final rheology adjustment to the end and rebuild the viscosity curve with the full formula. |
| Low or variable assay | Sampling error, crystals, adsorption, degradation, or poor extraction | Validate the analytical recovery and sampling plan before blaming raw-material potency. |
| Microbial challenge failure | Climbazole was incorrectly treated as the complete preservation system | Design and validate a separate broad preservation strategy for the finished product. |
| Good assay but weak claim performance | Insufficient deposition, short contact time, rinse loss, or an unrealistic use protocol | Optimize the complete delivery system and perform formula-specific efficacy testing. |
Stability, Safety, and Claim Test Matrix
A high-quality Climbazole shampoo release plan should connect every test to a decision gate. At minimum, include:
- Physical stability: appearance, crystal inspection, color, odor, pH, viscosity, density where relevant, centrifuge screening, temperature cycling, freeze-thaw where appropriate, and long-term storage.
- Chemical stability: Climbazole assay and relevant degradants or impurities at time zero and defined stability intervals.
- Packaging compatibility: active recovery, leakage, paneling, discoloration, odor transfer, pump or closure function, and material interaction in the final pack.
- Microbiological quality: routine limits plus a finished-product preservative efficacy or challenge test. Antifungal scalp activity does not automatically preserve the complete formula.
- User safety: a market-appropriate safety assessment and compatibility testing for the intended population and use conditions.
- Claim substantiation: a controlled finished-product study with pre-defined endpoints, realistic wash frequency, contact time, comparator, and statistical plan.
For supplier changes, fragrance changes, solvent changes, and significant process changes, use a documented risk assessment to decide which parts of this matrix must be repeated.
EU and U.S. Regulatory Checks
Climbazole can have different legal conditions depending on function and market. The following is a screening summary, not a substitute for review of the current law at the time of launch.
| Market and function | Current screening point | Maßnahmen des Käufers |
|---|---|---|
| EU, anti-dandruff function | Annex III entry 310 restricts non-preservative use to rinse-off anti-dandruff shampoo at a maximum of 2.0% in the ready-to-use product. | Confirm the current consolidated Cosmetics Regulation, intended function, safety assessment, and claim file. |
| EU, preservative function | Annex V entry 32 sets 0.2% for hair lotions, face creams, and foot-care products, and 0.5% for rinse-off shampoo. | Do not use the anti-dandruff ceiling as a preservative limit. Review Regulation (EU) 2019/698 and the current consolidated text. |
| EU safety basis | Der SCCS opinion evaluated the specified uses and aggregate exposure scenario. | Keep the safety assessment tied to product type, exposure, function, and actual concentration. |
| United States, cleansing shampoo | A basic cleansing shampoo may be a cosmetic, but intended use and claims control classification. | Review the complete label, website, advertising, consumer perception, and ingredient presentation. |
| United States, anti-dandruff claim | FDA states that an anti-dandruff shampoo is both a cosmetic and a drug. Climbazole is not listed among the active ingredients in OTC Monograph M032. | Do not transfer an EU cosmetic claim directly to the U.S. Have qualified regulatory counsel review the product pathway and the FDA cosmetic-versus-drug criteria. |
Important: a legal maximum is not a recommended use level, and a supplier recommendation is not a legal maximum. Both must be checked separately.
Climbazole RFQ Checklist for Procurement Teams
A precise request for quotation produces a more useful response than asking only for price and MOQ. Include:
- Target countries and planned launch date.
- Finished product type and exact intended claims.
- Target Climbazole level or the pilot range to be screened.
- Surfactant system, pH target, viscosity target, solvent restrictions, and fragrance status.
- Required specification, COA, TDS, SDS, regulatory statements, and change-control documents.
- Sample quantity, pilot batch size, annual volume forecast, preferred packaging, and delivery destination.
- Required Incoterm, lead time, shelf-life minimum at receipt, and supplier audit expectations.
- Whether analytical method support or formulation troubleshooting is needed.
This information lets the supplier identify compatibility risks early and quote the correct grade, package, documentation scope, and delivery plan.
Häufig gestellte Fragen
Is Climbazole water-soluble?
It is poorly soluble in water. ZLEY reports solubility in ethanol and compatible surfactant solutions, so a controlled preblend is normally more reliable than direct powder addition to the water phase.
What Climbazole level should a formulator start with?
ZLEY recommends 0.1%-0.5% for initial formulation work. Screen several levels in the same base and select the final level from stability, safety, efficacy, cost, claim, and local-regulatory results.
Can Climbazole replace the shampoo preservative system?
Do not assume so. Its scalp-care activity and its function as a product preservative are different questions. The complete finished product still needs a market-appropriate preservation strategy and a successful challenge test.
Can Climbazole be combined with Piroctone Olamine?
Published studies report promising results for certain combinations, but performance depends on the exact formula and concentrations. Test single-active controls, the combination, active recovery, stability, and the intended finished-product claim.
Can a U.S. shampoo claim to treat dandruff because it contains Climbazole?
Not automatically. FDA treats anti-dandruff shampoo as a drug-cosmetic, and Climbazole is not an M032 monograph active. The intended claims and regulatory pathway require qualified review before launch.
Regulatory information in this article is a formulation-screening reference and should be rechecked against current official requirements for every target market and claim.