What dicaprylyl ether actually is
Dicaprylyl Ether is a saturated dialkyl ether built from two C8 (caprylyl) chains joined through an ether bond. Because it carries no ester linkage, no unsaturation and no branching in the main chain, it behaves quite differently from the triglyceride and ester emollients it is often used alongside.
You will see the same molecule traded under several names. Dioctyl Ether and Caprylyl Ether are the most common synonyms, along with the systematic name 1,1'-oxybisoctane and the older trade designation n-octyl ether. Brand names add a further layer: BASF sells it as Cetiol® OE, Sasol as COSMACOL® OE, and other producers use the plain INCI name.
In Europe the ingredient is normally specified by its INCI name. What your formulator needs is material that meets the INCI definition — not material that arrives under a particular brand. That distinction is what makes a second source technically feasible in the first place, provided the physical and chemical parameters line up.
Why formulators specify it
The appeal is a combination of sensory performance and stability that few single emollients deliver together.
- High spreading value, dry skin feel. Dicaprylyl Ether spreads quickly and leaves a light, non-greasy residue, which is why it appears in products where occlusiveness would be a defect rather than a benefit.
- Hydrolytic stability. Ester emollients can hydrolyse under extreme pH or in the presence of water over time; the ether linkage does not. This is what makes the ingredient workable in antiperspirant, deodorant, depilatory and hair colour systems where ester-based oils struggle.
- Low polarity. The molecule is compatible with silicones, organic UV filters and pigments, and it acts as a useful solubiliser for solid UV filters in sun care.
- Oxidation stability. With no unsaturation to speak of, rancidity and odour drift are far less of a concern than with many vegetable-derived emollients.
- Silicon-free positioning. It is one of the standard replacements for D4/D5 cyclomethicones in formulations that have moved away from volatile silicones.
Typical application areas include skin care (creams, lotions, serums, facial oils), sun care, colour cosmetics, hair care, and antiperspirant/deodorant systems.
How to read a dicaprylyl ether specification sheet
A purity figure on its own tells you very little. The parameters below are the ones that determine whether a batch will behave like the material your formulator already validated.
| Parameter | Typical value | Why it matters commercially |
|---|---|---|
| Assay (GC) | ≥ 99.0% | Sets the cost-in-use calculation and how predictable the sensory result will be |
| Appearance | Clear, colourless liquid | Visible defects in clear or pale finished products |
| Colour (APHA / Hazen) | ≤ 50–100 | Critical for white and light-tinted emulsions; a weak point for low-grade material |
| Acid value | ≤ 0.5 mg KOH/g | Stability indicator; drifts affect formulation pH over shelf life |
| Iodine value | ≤ 3 g I₂/100 g | Proxy for unsaturation and therefore for oxidation susceptibility |
| Water content | ≤ 0.1% | Affects microbial risk and emulsion stability |
| Density (20 °C) | 0.80–0.815 g/cm³ | Conversion and process parameter |
| Odour | Faint, characteristic | Carries through to the finished product |
When two quotes differ substantially on price but match on purity, the difference is almost always in colour, acid value, water content or odour — the parameters that cost money to control and that a thin specification sheet conveniently omits. Always ask for a batch COA with measured values, not typical values.
Three supplier structures, three risk profiles
The European market for this ingredient is served by three quite different types of supplier, and they carry different kinds of risk.
International brand producers
Complete regulatory documentation, highly consistent quality, formulator familiarity, brand acceptance in claims
Watch out for: Higher price, large minimum order quantities, longer and less flexible lead times, and supply concentrated in a small number of production sites
Factory-direct producers
Competitive pricing, flexible MOQ and packaging, ability to produce to a customer specification, direct traceability to the production batch
Watch out for: You have to verify the factory actually exists, and documentation quality varies widely between producers
Traders and directory listings
Convenient to find, low entry quantities, quick to quote
Watch out for: Origin often untraceable, batch-to-batch consistency unguaranteed, and regulatory documents pass through hands that may not understand them
A large share of the listings you will find on chemical marketplaces are traders rather than producers — including some that present themselves as manufacturers. Three questions separate them quickly:
- What is the production address, and can you provide a batch traceability sample from it?
- Can you share the quality system certificate and confirm its scope covers this specific product?
- Who performed the last assay on this batch, and can I see the raw analytical report rather than a summary sheet?
The compliance documents that carry real weight
Safety Data Sheet
Ask for a GHS/CLP-format SDS compliant with Regulation (EC) No 1272/2008. An SDS written to US OSHA or to an older national format is a warning sign about how carefully the supplier maintains its documentation. Dicaprylyl Ether is not classified as dangerous for transport (non-hazardous, NONH), but a current SDS is still required for handling, storage and downstream customer obligations.
Certificate of Analysis
Every batch, with measured values rather than a template of typical values. Compare against the specification you approved — not against the supplier's own marketing sheet.
REACH status — the part that is most often misrepresented
Under Regulation (EC) No 1907/2006, the registration obligation sits with the EU legal entity that places the substance on the EU market. If your company imports the material into the EU, the obligation is yours, and it is triggered once your annual import volume reaches 1 tonne per year for that substance.
A non-EU supplier cannot discharge that obligation on your behalf unless it has formally appointed an Only Representative (OR) under Article 8 of the regulation. This is precisely why the question “Are you REACH registered?” produces so many misleading answers: it invites a yes from suppliers who cannot point to any registrant.
The useful question is not whether the supplier is registered, but: have you appointed an Only Representative, and if so, who is it? A supplier that can name its OR and provide the registration number is in a different category from one that simply says “REACH compliant”. Be cautious with any blanket registration claim that cannot be traced to a named legal entity.
EU Cosmetics Regulation (EC) No 1223/2009
Responsibility for a cosmetic product rests with the Responsible Person established in the EU, and the ingredient's status has to be reflected in the Product Information File. As an ingredient supplier, your role is to supply the information the Responsible Person needs. That typically means being able to document:
- Heavy metal limits and the analytical method behind them
- Residual solvent information
- Microbiological specification and test method
- Absence of CMR substances and of nanomaterials
- Non-animal testing statements where relevant
Quality system
An ISO 9001:2015 certificate is only meaningful if its scope actually covers the product and the site where it is made. Check the scope statement, the site address and the certificate's validity date — and note that certification is a process claim, not a product claim.
Packaging, lead time and logistics
| Item | Detail |
|---|---|
| Standard export packaging | 200 kg net iron drum |
| Alternative packaging | Smaller containers for trial and pilot quantities; bulk packaging on request |
| Typical lead time (stock material) | 5–7 working days after order confirmation |
| Typical lead time (production batch) | Confirmed by email, based on quantity and specification |
| HS code | 29091990 |
| Incoterms | FOB, CIF or DDP depending on destination |
For a first order, request a sample in the packaging format you intend to use in production. Iron drums, HDPE containers and IBCs can each interact differently with the material over time, and packaging compatibility is occasionally the reason a substitution fails at scale rather than in the lab.
A practical pre-purchase checklist
- Specification sheet received, with colour, acid value, iodine value and water content stated — not just assay
- Batch COA with measured values reviewed against your approved specification
- SDS in current GHS/CLP format obtained and checked for the transport section
- REACH question resolved: established whether you are the importer, and whether the supplier has an Only Representative
- ISO 9001:2015 scope verified against the actual production site
- Sample requested in production packaging, with a stability and compatibility plan agreed
- Commercial terms fixed: quantity, Incoterm, lead time, payment terms and documentation pack
- Backup source identified — single-source supply is the most common structural weakness in emollient sourcing