Menthol Crystal Bold (Edible Grade) is a 99% pure, mint-flavoured crystalline form of menthol extracted from Mentha arvensis (peppermint) oil, used to give a cooling, tingling sensation to balms, lip care, cooling gels, scalp treatments and confectionery. It comes as clear-to-white waxy crystals that melt easily into oils, and Azlok stocks it in packs from 50 grams up to 20 kilograms.
What is menthol crystal bold?
These are colourless to slightly foggy hexagonal crystals concentrated from peppermint oil. The oil is slowly cooled, refrigerated to crystallise, spun in a centrifuge and then dried, so what you get is highly concentrated menthol rather than a diluted liquid. The "bold" refers to the larger crystal size, and the edible grade means it meets a higher purity standard suitable for food-contact and cosmetic work.
A few quick specifics worth knowing: the chemical formula is C10H20O, CAS number 89-78-1, molecular weight around 156.26 g/mol, and a melting behaviour that lets it liquefy in warm oil. Purity is 99% and the typical shelf life is 24 months when stored well.
Common uses
- Balms and ointments: chest rubs, muscle balms and pain-relief salves rely on menthol for that cool, soothing feel.
- Lip care: a tiny pinch gives lip balms a fresh, tingly finish.
- Cooling gels and after-sun gels: pairs well with aloe-based gels for a chilled sensation.
- Scalp and hair oils: adds a refreshing tingle to scalp treatments and oils.
- Soaps and bath products: gives cold-process soap and shower bars a mint kick.
- Confectionery and food flavouring: being edible grade, it is used sparingly in mints, syrups and similar products.
How to melt and use it
Menthol crystals dissolve readily into carrier oils, alcohol and melted waxes, but not into plain water. Here is a simple approach:
- Weigh your crystals accurately. Menthol is potent, so measure in grams rather than eyeballing it.
- Warm your carrier oil or wax base gently on a low double boiler.
- Add the crystals and stir until fully dissolved and clear.
- Remove from heat, blend in any other actives or fragrance, and pour into your containers.
For usage levels, a light cooling effect usually sits around 0.5–2% of the total recipe. Muscle balms may go higher, while leave-on face and lip products should stay on the lower side. Always start conservative and test — you can add more, but you cannot take it out.
Safety and dilution notes
Menthol is strong, so treat it with respect.
- Never apply neat. Undiluted menthol can irritate or burn skin. Always dissolve it in a base first.
- Patch-test any new formulation on a small area before regular use.
- Keep away from eyes and mucous membranes. The vapour is intense; work in a ventilated space.
- Avoid on infants and very young children, especially near the face and nose.
- For food use, stick to tiny, measured quantities and follow proper food-safety practice.
- Store safely and keep out of reach of children. The flash point is around 93 °C, so keep crystals away from open flame during melting.
Buying and storage tips
Buy a pack size that matches how quickly you will use it — a little goes a long way, so 50 or 100 grams is plenty for home hobbyists, while soap makers and small businesses may prefer the bulk 1 kg to 20 kg packs. Azlok offers edible-grade menthol crystal bold across all these sizes.
To protect the crystals, keep them in an airtight container away from heat, light and strong odours. Menthol sublimates and can escape as vapour if the container is left open, which weakens the product over time. Stored correctly, it holds well for up to 24 months. Ask for the COA and MSDS if you need them for compliance or record-keeping.
FAQ
Is edible-grade menthol crystal safe to eat?
Edible grade means it meets a purity standard suitable for food use, but only in very small, measured amounts as a flavouring. It is not meant to be consumed on its own. Follow food-safety guidance and never use it as a substitute for medicine.
How do I dissolve menthol crystals?
Dissolve them in warm carrier oil, melted wax or alcohol — not water. Gentle warmth and stirring will turn the crystals into a clear liquid that blends into your recipe.
How much menthol should I add to a balm?
A common range is about 0.5–2% of the total weight for a noticeable cooling effect. Start low, test the feel, and increase gradually. Leave-on products for face and lips should stay at the lower end.
Why do the crystals look slightly foggy?
A clear-white, slightly foggy appearance is normal for bold edible-grade menthol. It does not indicate any problem with quality or purity.
How long do menthol crystals last?
Around 24 months when kept in an airtight container away from heat and light. Because menthol evaporates when exposed to air, always reseal the pack tightly after use.