Customer focus
Need certificates, a quality questionnaire completed or an audit of how your project is run? The Guires CSL quality team supports your due diligence and supplier approval.
Quality & accreditations
Certified, controlled and on the record.
How Guires CSL controls quality from raw material to finished batch: ISO 9001 certified, with ISO 22716 GMP, ISO/IEC 17025, GLP and GCP standards applied across our work.
Guires Cosmetic Science Lab
Quality you can check and defend
Quality at Guires CSL starts at the bench and runs through every batch: a certified quality management system, documented methods, calibrated instruments, traceable raw materials and controlled records, so every result we report can be checked and defended.
Start your project with Guires CSLRaw materials
Quality starts at the source
Every formula is only as good as what goes into it. Guires CSL qualifies suppliers before their materials reach the bench, checks each lot against its specification and certificate of analysis, and keeps raw materials in a controlled store with quarantine and release status.
- Supplier qualification and approved supplier list
- Certificate of analysis checked for every lot
- Allergen, halal and vegan segregation where needed
- Lot traceability from supplier to finished batch
Testing
Quality at the bench
Results are only useful if they can be repeated and defended. Guires CSL runs documented methods to ISO and OECD standards on calibrated, maintained instruments, with controls in every run and raw data kept for review.
- ISO 11930, ISO 17516 and OECD test methods
- Instrument calibration and maintenance records
- Positive and negative controls in every run
- Raw data and reports kept for audit
Pilot manufacturing
Quality in every batch
Pilot and small batches follow ISO 22716 cosmetic GMP guidelines and the process signed off in development. Each batch is recorded, sampled and checked against its release specification before it leaves the Guires R&D Innovation Centre.
- Batch manufacturing records for every run
- In-process and release testing
- Retained samples for every batch
- Change control when a formula or supplier changes
Our people
A team you can trust
Quality is part of how the Guires CSL team works, not a final check. Formulation scientists, analysts, microbiologists, toxicologists and regulatory specialists are trained on the procedures they use, and every report is reviewed before it reaches you.
- Role-based training records
- Second-person review of every report
- Qualified safety assessors for safety reports
- Clear ownership from brief to batch
Certificates & standards
What we work to.
| Standard | What it covers | How Guires CSL applies it |
|---|---|---|
| Quality management · ISO 9001 | The quality management system that covers Guires CSL development, testing and project work. | Certified · certificate no. H3CR9TCU20251212INDQM10N |
| Cosmetic GMP · ISO 22716 | Good Manufacturing Practice guidelines for cosmetics, applied to pilot and small-batch manufacturing. | Applied to every pilot batch |
| Testing competence · ISO/IEC 17025 | The general requirements for testing laboratories, applied to the methods on our Testing page. | Scope documents on request |
| Good Laboratory Practice (GLP) | Principles for planning, recording and reporting non-clinical and in vitro studies. | Applied to non-clinical studies |
| Good Clinical Practice & ethics review | GCP for every human study, with independent ethics committee approval before a study starts. | Every clinical study |
Certificates, scope documents and quality policies are available on request.
Support
Quality support for your team
Regulatory support
Rules differ by market and change often. Guires CSL regulatory specialists link test data to the safety files, claims and labels each market expects, from the EU CPSR to MoCRA.
Clinical standards
Every human study runs to Good Clinical Practice, with independent ethics committee approval, informed consent and dermatologist supervision where the study design calls for it.
Certifications we support
For your product.
Vegan
Formula and supplier documentation for vegan certification schemes.
Cruelty-free & Leaping Bunny
Supplier declarations and supply-chain files for cruelty-free certification.
COSMOS & ECOCERT
Natural and organic formulation to COSMOS standards, with the files certifiers ask for.
Halal
Raw-material tracing and files for your halal certifier.
Case studies
Proof from real projects.
Case studies are published with client permission. Client and product names are withheld under NDA.
Reverse engineeringDeformulating a benchmark body lotionBody lotion · Africa · 98% of the formula decoded with analytical chemistry and machine learning.98% of the formula decodedRead the case study
Technical benchmarkingBenchmarking a client’s new range against the marketThree client products · Canada · each benchmarked against multiple market references, without animal testing.3 client products benchmarked against multiple referencesRead the case study
Start a project
Create your next product with CSL.
Our formulation chemists, testing scientists and regulatory specialists work alongside your team, from the first brief to a market-ready product. Bring a brief, a benchmark or just an idea: a scientist will reply within one working day with next steps and an indicative scope.