BUTTER-C
Signature ingredients
Lemon oil hand wash OEM/ODM manufacturing
Lemon Oil Hand Wash · Signature Ingredients · OEM/ODM
A lemon scent is a familiar choice for hand washes at home, in offices and in restaurants. The named ingredient is lemon peel oil (INCI: Citrus Limon Peel Oil), taken from the oil glands in the outer peel of the yellow lemon, Citrus limon — not lime, and not lemon juice. Its main component is limonene; on air exposure limonene oxidizes into hydroperoxides, contact allergens documented in patch-tested patients. Cold-pressed oil also contains furocoumarins, compounds that react with UVA light; for rinse-off products such as a hand wash, CIR does not apply its bergapten limit and the IFRA standard cited by CIR sets no limit for cold-pressed lemon oil, but choosing the right grade still matters when the same line includes a leave-on hand cream. We have not found a controlled human trial of lemon peel oil applied to the skin for a cosmetic benefit. Butter-C’s lemon oil hand wash therefore promises clean hands, fine lather and a fresh lemon scent, with oil of the right species, a peroxide value and an antioxidant — not an effect on bacteria, odor removal or brighter skin. Butter-C offers turnkey OEM/ODM manufacturing, from formula development and testing to labeled finished goods and the notification dossier.
Formula base
Cleansing system, lemon peel oil and antioxidant
A lemon oil hand wash uses the same cleansing and moisturizing system as a standard hand wash; what is specific is choosing the right grade of lemon peel oil, keeping limonene from oxidizing and solubilizing the oil into a water base.
Lemon peel oil (Citrus Limon Peel Oil)
In Butter-C’s current ingredient list, declared under this INCI. Per CIR 2019, limonene makes up 38.1–95.8% of cold-pressed oil depending on the sample; aldehydes as citral are 1.0–3.5% in distilled oil and 1.7–5.5% in cold-pressed oil depending on the region (Food Chemicals Codex as cited by CIR). The US industry survey cited by CIR lists maximum reported levels in rinse-off products of 0.0006–0.001% — market practice, not a limit; the level is set by scent intensity, the lot’s IFRA certificate, the safety assessment in the PIF and tolerance testing on the finished product.
Cleansing system
Sodium laureth sulfate with cocamidopropyl betaine for a high-lather, cost-effective gel; decyl glucoside and sodium lauroyl sarcosinate for a sulfate-free line (mildness tested on the finished product) — as on the general hand wash page.
Solubilizing the oil in a water base
Lemon peel oil does not dissolve in water. The surfactant system usually solubilizes a small amount; a clear gel or a foaming wash may need PEG-40 hydrogenated castor oil or Polysorbate 20, premixed with the oil before adding, in the cool-down phase. The ratio is chosen by clarity testing at cold, room and warm temperatures.
Antioxidant and moisture
The IFRA standard cited by CIR requires limonene and natural products rich in limonene to keep peroxides low, with a peroxide value below 20 mmol/L. In the formula: tocopherol premixed with the oil and disodium EDTA to bind metal ions; glycerin and panthenol so hands do not feel dry after many washes a day (assessed on the finished product).
Key technical points
True lemon, the right oil grade for the product, unoxidized limonene
These four points are where a lemon oil hand wash differs from a standard hand wash; each is settled by a certificate of analysis or a test on the sample.
Yellow lemon, peel, the right extraction method
CIR 2019 defines the ingredient as the volatile oil obtained from the peel of Citrus limon (related CAS numbers include 8008-56-8 and 84929-31-7). Lime (Citrus aurantifolia), fruit extract, juice and peel extract are different INCI names with different data. The certificate states the scientific name, plant part and method: cold-pressed (keeps a non-volatile fraction, contains furocoumarins), distilled (per CIR, steam distillation removes furocoumarins), furocoumarin-free or deterpenated grades (separate commercial products, confirmed by a certificate for every lot).
Furocoumarins: what each limit applies to
Naganuma 1985: oxypeucedanin and bergapten account for essentially all the phototoxic activity of lemon oil; bergapten 4–87 ppm, oxypeucedanin 26–728 ppm, varying more than 20-fold by growing region. ASEAN Annex II Ref 358 prohibits furocoumarins “except for normal content in natural essences used. In sun protection and in bronzing products, furocoumarines shall be below 1mg/kg”. CIR’s 15 ppm 5-methoxypsoralen (bergapten) condition applies to finished products other than rinse-off; the 2009 IFRA standard quoted by CIR caps cold-pressed lemon oil at 2% in leave-on products on sun-exposed skin, with no limit for rinse-off products — the current IFRA version is confirmed by the fragrance supplier. A hand wash is rinse-off; a leave-on hand cream in the same line must be recalculated.
Oxidized limonene creates allergens
Limonene exposed to air forms hydroperoxides that are far more sensitizing than pure limonene (de Groot 2019). Hence: a certificate with peroxide value, full and closed drums, prompt use after opening, adding the oil in the cool-down phase with an antioxidant, and light-protective bottles. Besides limonene, lemon peel oil contains citral, which is on the SCCS list of human contact allergens cited by CIR.
Labeling fragrance allergens
ASEAN: lemon peel oil, limonene and citral are not listed by name in Annexes II, III, VI (version 2026-1) or VII (version 2025-2); Annex III reads “67 to 92 — Entries left intentionally blank”, so there is no separate naming threshold, and the ASEAN labeling guideline allows the generic words “perfume” or “fragrance”. EU exports: Regulation (EU) 2023/1545 requires Citrus Limon Peel Oil (entry 353), Limonene (entry 88) and Citral (entry 70) to be named above 0.01% in rinse-off products, with a limonene peroxide value below 20 mmol/L; non-compliant goods could be placed on the EU market only until 31 July 2026 (passed). Limonene and citral from other fragrances and oils go into the same calculation.
Three formulation directions
Three lemon oil hand wash lines
Clear lemon hand wash gel
Sulfate–betaine system thickened with salt, a solubilizer for the oil; clear gels need clarity testing at several temperatures and odor tracking through aging.
Sulfate-free lemon hand wash
Glucoside–sarcosinate–betaine system thickened with xanthan gum, plus glycerin and panthenol; a gentle positioning for frequent hand washing — mildness tested on the finished product.
Lemon foaming hand wash
A thin base for foaming pumps: glucoside with betaine, the oil pre-solubilized with Polysorbate 20; viscosity low enough not to clog the foaming mesh.
Packaging must be designed with the formula
Pump bottles, foaming bottles, refill pouches and large canisters for offices; plastics, gaskets and pumps must withstand the essential oil (compatibility testing), and light-protective bottles help keep the scent. Large canisters opened many times need thorough preservative efficacy testing.
Parameters we monitor
What our R&D team measures on every sample
Below is the set of parameters Butter-C monitors during formula development and scale-up. Specific limits are agreed with you on the approved sample and then written into the product’s in-house specification.
- Incoming oil dossier
- Scientific name (Citrus limon), peel as plant part, extraction method (cold-pressed, distilled, furocoumarin-free), furocoumarin content where available, peroxide value, fragrance allergen declaration, IFRA certificate — for every lot.
- Sensory and odor
- Compared with the reference sample at each stability point; a lemon scent losing freshness or shifting character signals oxidation and needs rechecking.
- pH
- Measured at 25 °C, at release and after aging; kept within the agreed range for mildness and preservative performance.
- Viscosity and clarity
- Rotational viscometer at 25 °C; the oil shifts the viscosity curve, so thickness is adjusted last; the clear gel and foaming versions are checked for clarity at cold, room and warm temperatures.
- Foaming
- Foam height and stability; the foaming version is tested in the actual foaming bottle.
- Stability
- Freeze–thaw cycling, storage at 40 °C and under light; watch for separation, color and odor change and viscosity drift.
- Microbiology and preservative efficacy
- Tested at a GLP / ISO 17025-accredited laboratory; preservative efficacy (challenge) test per ISO 11930. The ASEAN Annex VI preamble notes that many essential oils have anti-microbial properties but are not included in the preservatives list — lemon oil does not replace the preservative system.
- Fragrance allergen calculation
- Limonene, citral, linalool and others summed from the oil and fragrance per supplier declarations; EU exports checked against the 0.01% rinse-off threshold.
- Packaging compatibility
- Filled into the actual bottles, pouches and canisters; check pump force, leakage, plastics and gaskets softened by the oil, staining and scent loss.
Claims
Claims for a hand wash with lemon peel oil
A hand wash is a cosmetic when it claims cleansing; lemon peel oil is a fragrance ingredient. Claims about microorganisms move the product into a different dossier category (see the hand sanitizer gel page). Butter-C reviews the wording on labels and marketing materials when preparing the notification dossier.
Cleanses the hands, fine lather, rinses quickly
Instead of: claims to act on bacteria, figures such as “removes 99.9% of bacteria”.
Fresh lemon scent when washing hands
Describes the scent. Instead of: removes fishy or bad odors from hands thanks to the oil, enhances emotions.
Contains lemon peel oil (Citrus limon) for fragrance
Instead of: “natural, so it won’t cause allergies”, “all-natural”, “natural preservative”.
Hands feel soft, not tight, after washing (with sensory testing)
Instead of: whitens hands, fades dark spots thanks to lemon.
Lemon and skin: read in context
We have not found a controlled human trial of lemon peel oil applied to the skin for a cosmetic benefit; data on reduced melanin formation are in vitro, on a CO2 extract of lemon peel, not commercial essential oil. Conversely, lemon juice on skin in the sun caused burn-like injuries in a 7-year-old girl, who was hospitalized for 4 days (Matthews 2017). As summarized by CIR, lemon oil at 1% in water, occluded for 1 hour then exposed to UVA, caused phototoxic reactions with irritation in 4 of 5 women, with none at 0.1% or below (Kejlova 2010) — worth remembering if the same line includes a leave-on hand cream.
Label warnings
Avoid contact with eyes; stop use if redness, itching or stinging occurs; people already allergic to fragrance should choose fragrance-free products. In patch-test studies of referred patients (not the general population): oxidized limonene was positive in 0.3–6.5% depending on the clinic among 2,273 people (Matura 2002); limonene hydroperoxides 0.3% were positive in 5.0% of 4,731 people (Audrain 2014). Keep out of reach of young children.
Manufacturing specifications
Current capabilities
- Textures
- Clear liquid gel, pearlescent gel, ready-made foam; lemon scent as strong or soft as required.
- Lemon oil material
- Lemon peel oil (Citrus Limon Peel Oil) is in Butter-C’s current ingredient list; each lot comes with a certificate stating the scientific name, extraction method and peroxide value.
- Pack formats
- Pump bottles, foaming bottles, refill pouches, large canisters. Volume agreed when selecting packaging.
- Minimum order quantity
- Agreed per order and per scent.
- Testing
- Tested at a GLP / ISO 17025-accredited laboratory, with a certificate of analysis delivered with every batch.
- Documentation
- Product Information File (PIF) and cosmetic product notification dossier prepared by Butter-C, with a fragrance allergen calculation for EU exports.
- Packaging
- Label design, printing and packing run in parallel with formulation.
Suggested product concept
Sulfate-free moisturizing lemon hand wash
One product concept to help you picture the possibilities — not a ready-made product for sale. The actual formula is developed around your brand’s positioning and price range.
Glucoside–sarcosinate–betaine system
Decyl glucoside, sodium lauroyl sarcosinate, cocamidopropyl betaine; fine lather, quick rinse, can be labeled “sulfate-free”.
Lemon peel oil as the named ingredient
Added in the cool-down phase with tocopherol; level set by scent intensity and the lot’s IFRA certificate; certificate states Citrus limon, extraction method and peroxide value.
Glycerin, panthenol
So hands do not feel dry after frequent washing; softness and lack of tightness assessed on the finished product.
Light-protective 500 ml pump bottle with a refill pouch
Label with eye-contact directions; EU exports name Citrus Limon Peel Oil, Limonene and Citral above the threshold.
Customization options
What you can specify
The same product type can serve very different customers. Tell us your requirements in the areas below and our pharmacists will develop a matching formula.
Lemon oil grade
Cold-pressed (fresh scent, contains furocoumarins) or distilled (softer scent); furocoumarin-free or deterpenated grades are separate commercial products — process and specifications per the TDS and certificate. The deterpenated grade caused phototoxic reactions at a lower level than the regular oil (0.1% in humans, per CIR) — important for leave-on use.
Source of the lemon scent
Lemon peel oil only, blended with fragrance, or blended with other citrus oils (orange, grapefruit, lime, bergamot) — label the true sources; for leave-on products, per IFRA as cited by CIR, phototoxic substances must be summed.
Cleansing system
With or without sulfates; rich lather or gentle; gel or ready-made foam.
Sales channel
Homes, offices, restaurants, hotels — decides large canisters, refill pouches and cost per wash.
Product line coordination
Hand cream and body wash with the same lemon scent: leave-on products need their own oil grade and furocoumarin certificate. Lemon dishwashing liquid is a household product and does not follow the cosmetic dossier.
Ingredient direction
Vegan, paraben-free, colorant-free — please state this from the start, as it affects the formula base.
Further reading
Related knowledge
Lemon peel oil (Citrus Limon Peel Oil) in cosmetics
Cold-pressed and distilled grades, furocoumarins, oxidized limonene and allergy, ASEAN and EU rules (in Vietnamese).
Liquid hand wash manufacturing
General page on cleansing, moisturizing and pack formats for hand washes; this page focuses on lemon peel oil.
Hand sanitizer gel manufacturing
Waterless, alcohol-based format; the claim decides the dossier category.
Sweet orange oil body wash manufacturing
A rinse-off product named after another citrus oil, with the same limonene and furocoumarin questions.
Hand cream manufacturing
Hand care after frequent washing — a leave-on product, so the lemon oil grade is recalculated.
Contact dermatitis from cosmetics
Why people already allergic to fragrance should choose fragrance-free products (in Vietnamese).
How we work
From idea to finished batch
Eight steps and three milestones signed off by both sides: approved sample, notification number, finished batch. Step-by-step details (in Vietnamese) →
Get started
Tell us about the product you plan to launch
Send us your product direction and expected volume. Our team will get back to you during business hours (Vietnam time, GMT+7).
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