Colourants and tints in lip balm: what is approved and how to disperse it

Colour additives for lips sit on restricted lists in the US and EU. Which pigments work, how to disperse them in an anhydrous base, and why plant colours fail.

Colour is the one balm ingredient where the regulation comes first and the chemistry second. Every other component of a balm is governed by general safety rules. Colourants are governed by positive lists: a pigment is permitted for a specific use because a regulator has listed it for that use, and if it is not on the list it is not permitted, however natural, however traditional and however many suppliers sell it.

Get that order right and the rest of the topic is mostly a dispersion problem, which is solvable with castor oil and patience.

The regulatory reality, first

In the United States, colour additives are handled separately from every other cosmetic ingredient. They must be listed by FDA for the intended use, and the listings in 21 CFR Parts 73 and 74 state exactly which uses are allowed. Many entries read "for coloring externally applied cosmetics", which explicitly excludes lips, because a lip product is ingested in part. Some colours must also be certified batch by batch, which is why certified lakes carry a lot number tied to an FDA certificate.

In the EU and UK, Annex IV of Regulation 1223/2009 lists the permitted colourants along with the field of application (whether a colourant may be used in all cosmetic products, only in products that do not come into contact with mucous membranes, only in rinse-off products, and so on) plus any purity and concentration conditions. A lip balm contacts mucous membrane, so it sits in the strictest applicable band.

Two practical consequences. First, the lists are not identical between markets, so a pigment can be perfectly legal in one and prohibited in the other. Second, the burden of proof is yours: you have to be able to show which listing covers each pigment in your product. That documentation is part of the file described in selling balms in the UK and EU and the US labelling duties in labelling cosmetics in the US.

Why "cosmetic grade mica" is not a lip approval

Mica sold to makers is rarely just mica. A commercial pearlescent pigment is a mica platelet coated with titanium dioxide, sometimes with iron oxides for a bronze or copper tone, sometimes with tin oxide, and frequently blended with other colourants to hit a shade. The regulatory status of the finished pigment is the intersection of the statuses of everything in it. Mica plus titanium dioxide is generally fine for lips. Mica plus a dye that is external-use only is not.

"Cosmetic grade" is a marketing phrase. It has no defined meaning and it does not distinguish lip from eye from external use. The questions to put to a supplier, and to keep the answers to, are: what is the full composition with CI numbers, is it approved for lip use in my market, what are the heavy metal specifications, and can you supply a certificate of analysis for the batch. A supplier who cannot answer those is selling soap colourant.

The pigment families

Iron oxides (CI 77491 red, 77492 yellow, 77499 black) are the workhorses. They are opaque inorganic pigments, extremely lightfast, heat stable, and available in every earth tone from a warm brown-red to a near-black. Almost every "natural tinted balm" that actually holds its colour is coloured with iron oxides. They are strong, so use levels are low.

Titanium dioxide (CI 77891) is the white. It is not usually used alone in lip products but as an opacifier that turns a transparent stain into an opaque colour and lightens a shade toward a pastel. Too much makes a balm look chalky and feel dry. Note that titanium dioxide is also a sunscreen active in the US, so a colour-level use is fine but any sun protection claim moves the product into a different category, as discussed in SPF in lip balm.

Micas and effect pigments (mica is CI 77019) give shimmer rather than colour. The optical effect comes from thin-film interference in the coating, so shade depends on coating thickness and particle size. Larger platelets give more sparkle and a coarser feel; smaller ones give a satin sheen. They contribute very little coverage, so a shimmer balm still needs iron oxide underneath it if you want colour.

Carmine (CI 75470) is the classic true red, extracted from cochineal insects. It gives a blue-toned crimson that iron oxides cannot match. It is not vegan, it must be declared on the label, and it is one of the few colour additives with documented allergic reactions, so it is a considered choice rather than a default.

Approved organic lakes are synthetic dyes precipitated onto an insoluble substrate so they behave as pigments. In the US these are the certified D&C colours, and only some are permitted for lips. They give bright, clean shades that mineral pigments cannot reach, at the cost of poorer lightfastness and, in some cases, staining.

Dispersion, and why castor oil

Pigment particles arrive as agglomerates held together by surface forces and air. Colour development requires wetting each particle, breaking the agglomerates, and keeping them apart. Stirring powder into a molten balm does none of these things properly, which is why the result is speckled and drags.

Castor oil is the classic wetting agent for this job because ricinoleic acid carries a hydroxyl group, which makes the oil unusually polar for a triglyceride and unusually viscous. The polarity lets it wet the polar surface of a mineral pigment and displace air; the viscosity means shear from grinding is transmitted to the agglomerates instead of the oil simply flowing around them. That mechanism is set out in more detail in castor oil.

1. Make a masterbatch. Weigh pigment and castor oil at roughly 1:3 to 1:1.5, giving a 25 to 40% pigment paste. Start thick: it is easier to thin than to grind a slurry.
2. Grind it. Work the paste on a glass tile with a spatula, a glass muller or a pestle. Five minutes of real work, not thirty seconds of stirring.
3. Check on glass. Draw the paste down thinly with a spatula edge. Streaks, specks and gritty lines mean it is not finished. A properly dispersed paste draws down as an even film.
4. Add to the melt. Stir the paste into the molten oil phase before the wax has begun to set, then keep stirring gently while it cools toward pour temperature so the pigment does not settle.
5. Swatch and adjust. Judge colour on skin from a cooled sample, never from the pot. Molten balm always looks darker and more saturated than the set stick.

Undispersed pigment is the direct cause of three complaints. Colour is patchy along the stick because agglomerates settled unevenly. The stick drags, because hard particles act as an abrasive between the balm and the lip, which is the mechanism described in drag and poor glide. And payoff is weak, because a fraction of the pigment surface is never exposed to light. Pigments also raise the viscosity of the oil phase and settle if you pour slowly, so hold to the ranges in pour temperatures and pour promptly.

Use levels and a worked example

Worked example for a sheer red tinted stick, weight percent of the total, totalling 100, for a 100 g batch: 14 g beeswax, 20 g shea butter, 12 g castor oil (of which 3 g is used to make the pigment paste), 42 g jojoba, 9 g fractionated coconut oil, 2 g red iron oxide, 1 g titanium dioxide. The pigment paste is therefore 3 g of iron oxide and titanium dioxide combined in 3 g of castor oil, a 50% paste, ground before anything is melted. That fills about twenty standard 4.7 g tubes. If the colour is too weak, raise the iron oxide to 3 g and drop the jojoba to 41 g rather than adding pigment to a finished batch.

Why plant colours do not work

The appeal is obvious and the failure is consistent. Beetroot's betanins and hibiscus's anthocyanins are water-soluble glycosides, so an oil infusion extracts almost none of them, and what does transfer degrades within weeks under light and warmth. Anthocyanins also shift colour with pH, so a pink balm goes brown or grey. Alkanet is the interesting case: its pigments genuinely are oil soluble, it produces a good red-purple in a herbal infused oil, and it still fails, because the colour is fugitive, shifts with pH on the lip, and the root carries pyrrolizidine alkaloids.

Then there is the regulatory point that almost nobody makes: in both the US and the EU, a substance used to impart colour is a colour additive regardless of its origin. A plant extract used to colour a lip balm has to be on the list, and most are not. A handful of botanical-derived colourants are listed for cosmetic use, which is exactly why the listed ones are worth knowing and the unlisted ones are not a legal shortcut. If you want a natural-looking tint that survives a year on a shelf, iron oxides are both the honest and the natural answer: they are mineral pigments, and they are the reason ochre has coloured things for forty thousand years.

Sun, heat and how tints age

Mineral pigments do not fade. Iron oxides and titanium dioxide are already fully oxidised and thermally stable well beyond any temperature a balm sees, so a stick tinted with them looks the same after a summer on a desk as it did on day one. Organic lakes are less durable and will shift and lighten with UV exposure. Plant colours are the worst case, often visibly weaker within a month.

Two second-order effects are worth knowing. Uncoated titanium dioxide is photocatalytic, meaning that under UV it can generate radicals that accelerate oxidation of the surrounding oils, which is why cosmetic grades are usually surface-treated and why an uncoated grade can shorten the life of a balm. And pigment-loaded balms are darker, so they absorb more radiant heat in a window or a car, compounding the ordinary problem described in rancidity and oxidation. Neither is a reason to avoid tints. Both are reasons to buy coated pigment and to store product away from light.

Getting a tinted balm right

Work in this order. Confirm the approval status of every pigment for lip use in your market and file the evidence. Buy documented pigment with a certificate of analysis. Build a pigment paste in castor oil and grind it properly. Formulate the base for glide first, because a tinted balm exposes drag that a clear one hides, and castor oil at 5 to 15% helps both the dispersion and the payoff. Then adjust colour by remaking, not by adding to a finished melt. The base process is in how to make lip balm, and if you are adding flavour as well, disperse the pigment first and add the flavour last off the heat, for the reasons in lip balm flavour and sweeteners.

Reviewed and updated 6 September 2026. Spotted an error? Tell us and we will fix and log it.