Illipe, sal and ucuuba butter: three hard butters and where each belongs

Illipe melts at 34 to 38 C, sal at 33 to 40 C and ucuuba at 49 to 53 C. Fatty acid profiles, cocoa butter equivalence and honest use levels of 3 to 20 percent.

People buy these three butters for one of two reasons: to get cocoa butter hardness without the chocolate scent, or to get a fat that is still genuinely solid at body temperature. Illipe and sal do the first job, ucuuba does the second, and treating them as interchangeable hard butters is how a batch ends up either bland or unusable. This page gives the melting data with the method attached, the triglyceride reason behind it, and the percentages that work.

• INCI: Shorea Stenoptera Seed Butter
• Illipe stearic 40-47%
• Ucuuba melts 49-53 C
• Ucuuba myristic 70%+
• Low iodine value, 8-45

What the three materials actually are

Illipe butter is the seed fat of Shorea stenoptera and related dipterocarps from Borneo, pressed from the nuts sold locally as tengkawang and known in the fats trade as Borneo tallow. Sal butter is the seed fat of Shorea robusta, a dominant forest tree across northern and central India, collected as a seasonal minor forest product. The two are close botanical cousins and behave alike, which is why they appear together in almost every specification sheet.

Ucuuba butter is a different kind of fat entirely. It comes from the seeds of Amazonian Virola trees, usually Virola surinamensis or Virola sebifera, and it is dominated by myristic acid rather than stearic. That single compositional fact drives everything else about it: the high melt, the brittle break, the fast set, and the fact that a body balm carrying 15 percent ucuuba will not melt on your skin.

All three are sold refined and unrefined. Unrefined illipe and sal are pale cream to beige with a faint waxy, nutty smell; refined grades are near white and near odourless. Unrefined ucuuba is a tan to reddish brown with a smoky character most people find intrusive in a lip product, so the deodorised grade is the practical choice for anything worn on the face. The trade is the usual one set out in butters compared: refining costs you minor components and buys you consistency.

Melting ranges and what they mean on skin

Butter melting figures are slip melting points or open capillary values (AOCS Cc 3-25 and Cc 1-25), not sharp transitions, because a natural fat is a mixture of triglycerides that softens over a band. Suppliers quote whatever their own lot measured, so expect a couple of degrees of spread between two sacks of the same material.

The practical consequence sits in the gap between the melt figure and skin temperature. Skin surface runs around 32 to 34 C, so illipe and sal are straddling it: part of the fat is liquid on contact, part is not, and the balm feels dense at first then releases. Cocoa butter sits slightly below and melts more completely. Ucuuba sits fifteen degrees above and does not melt at all on skin, so what you feel is the film the rest of the formula makes, with hard fat crystals suspended in it. The underlying idea, that what matters is solid fat content at 32 C rather than the melting point printed on the sack, is worked through in solid fat content.

Fatty acids, and why the profile predicts the feel

Three things fall straight out of that table. Illipe and sal are stearic and oleic fats with very little polyunsaturate, which is the classic recipe for a firm butter that does not oxidise quickly; the general mechanism is set out in stearic acid. Sal is unusual in carrying 6 to 11 percent arachidic acid, a C20 saturate that pushes its upper melting band above illipe and makes its behaviour a little less predictable from lot to lot. And ucuuba is not really in the same family at all: a fat that is three quarters myristic acid is closer in chemistry to the lauric palm butters covered in murumuru and tucuma butter, except that trimyristin melts far higher than trilaurin, which is why ucuuba is hard where murumuru is snappy.

Why illipe and sal are traded as cocoa butter equivalents

A cocoa butter equivalent is not a marketing phrase, it is a defined class of fat. To substitute for cocoa butter in a chocolate without softening it, a fat has to carry the same symmetrical monounsaturated triglycerides: a saturated acid at each end of the glycerol backbone and oleic acid in the middle. The industry shorthand is SOS, standing for stearic-oleic-stearic, with POP and POS as the palmitic variants. Cocoa butter is roughly 80 percent of these three species combined.

Illipe is the purest natural source of SOS in commerce, running higher in that single triglyceride than cocoa butter itself, with POS making up most of the remainder. Sal is close behind, with an extra fraction of arachidic-containing analogues. That structural match is why the two are miscible with cocoa butter in any proportion without the eutectic softening you get when you mix cocoa butter with, say, a lauric fat. Both are named in the European chocolate directive as vegetable fats permitted at up to 5 percent of a finished chocolate alongside palm, shea, kokum and mango kernel, which is as close to an official statement of equivalence as the category has.

For a balm maker the useful reading is this. If you replace part of the cocoa butter in a formula with illipe or sal, you keep the hardness, keep the crystal behaviour and lose the chocolate note, which is the whole point for a fragranced product. If you replace it with kokum butter you get a slightly harder, less brittle result. If you replace it with coconut oil or a lauric butter you get a softer product than either parent fat, because the triglycerides do not co-crystallise.

Ucuuba, the butter that behaves like a wax

At 49 to 53 C, ucuuba melts in the same territory as soy wax and only ten degrees below beeswax. Solid fat content stays high right through the range a balm gets used at: a fat this rich in trimyristin retains most of its crystal mass at 35 C and only collapses in the high forties. That is unique among widely traded plant butters. Kokum is often called the hardest butter, and among the stearic butters it is, but ucuuba melts a full ten degrees higher than kokum and is the only one of them that will not turn liquid in a hot car.

Use that as structure, not as a butter. At 2 to 5 percent of an anhydrous formula, ucuuba adds hardness and a faster set with much less of the drag a hard wax brings, because the crystals it forms are fat crystals rather than a wax network. It is a genuinely useful way to firm a body balm for summer distribution without pushing the total wax load up, and it partners well with the softer plant waxes for the same reason. Push past 8 to 10 percent and the balm stops melting on contact: it feels chalky, it rubs into a crumbly residue, and the complaint that comes back is the one described in cracked and crumbly balm.

Use levels, with two worked examples

All percentages below are weight percent of the finished anhydrous formula. Treat them as starting windows, not as limits, and change one variable at a time.

Worked example one, a lip balm for a warm climate, by weight: beeswax 12%, illipe butter 12%, shea butter 10%, castor oil 12%, jojoba 24%, sweet almond oil 30%. That totals 100. On a 60 g batch, which fills about a dozen 4.25 g tubes with overage, the illipe is 7.2 g. Against the same formula with cocoa butter in place of illipe you get a comparable hardness and no chocolate note fighting the flavour. The base method and the general percentage windows are in lip balm ratios, and the wax ratio calculator will re-cut the batch size for you.

Worked example two, a summer body balm: shea butter 40%, sunflower oil 30%, coconut oil 12%, beeswax 8%, sal butter 6%, ucuuba butter 4%. Also 100. The sal adds density, the ucuuba raises the temperature at which the tin softens without adding a fifth wax, and the total wax stays at 8 percent so the balm still spreads. Swap the ucuuba for another 4 points of beeswax and you get a harder but draggier tin, which is the trade the whole formula exists to avoid.

Bloom, polymorphism and the tempering that reduces it

SOS-rich fats crystallise in several forms, and the form you get depends on how the melt was cooled. Cocoa butter has six named polymorphs, and its familiar bloom is the slow conversion of the desirable form V into the coarser, higher-melting form VI, which pushes fat to the surface as a grey dusty film. Illipe and sal share the same triglyceride architecture, so they share the same tendency. Anything you know about bloom in cocoa butter applies to them, and the mechanism is set out in fat crystal polymorphism.

Ucuuba is a different problem. Myristic-rich fats favour the beta-prime form, which is fine-crystalled and stable enough in practice, but the alpha form crystallises first on a fast cool and then converts, and the conversion is what produces a gritty batch a fortnight after pouring. In both cases the failure is the same one seen in grainy shea butter, arriving by a slightly different route.

The handling that reduces both:

1. Melt fully, and mean it. Take illipe and sal to 55 to 60 C and hold for five minutes; ucuuba to 65 to 70 C. Anything below the highest-melting crystal in the fat leaves seed crystals that template the coarse form as it sets.
2. Cool fast through the setting window. Pour into containers and move them somewhere cool. Fast cooling favours many small crystals over few large ones, which is the whole argument in crystallisation and cooling rate.
3. Do not chill to freezing. A freezer drives the alpha form and buys you a conversion later. A refrigerator or a cold worktop is enough.
4. Let it settle before you judge it. These fats reach final hardness over 24 to 48 hours. A balm assessed twenty minutes after pouring reads soft, and correcting at that point over-hardens the next batch.

Pour temperature matters as much as melt temperature, because pouring too cool traps partly set fat in the container and pouring too hot slows the cool through the critical window. The ranges are in pour temperatures.

Oxidative stability and realistic shelf life

Iodine value counts double bonds, and double bonds are what oxidise. Illipe at 29 to 38 and sal at 31 to 45 are in the same band as cocoa butter, and ucuuba at 8 to 15 is close to inert. Combined with linoleic acid contents of 3 percent or less, that puts all three among the most stable fats you can put in a balm. Eighteen to 24 months from manufacture is a realistic unopened shelf life for the refined grades stored cool and dark, and the fat is rarely what fails first; the fragrance, an infused herb or a polyunsaturated carrier oil in the same formula will usually go before it does.

Two caveats. Unrefined grades carry more minor components and more variable handling history, so treat a supplier's date as the ceiling rather than the expectation. And ucuuba's short-chain saturates hydrolyse rather than oxidise: if water gets into a batch, the failure mode is a soapy off-note from free myristic and lauric acid rather than the cardboard smell of rancidity. That is worth knowing because it looks nothing like ordinary rancidity, and because the same moisture is what allows the growth covered in mould in balm. Keep water out, following moisture control, and the risk stays theoretical.

Supply, sustainability and what they cost

None of these is a commodity in the way shea or cocoa is, and the supply stories differ.

Illipe comes from dipterocarp forests in Borneo, and the genus fruits irregularly, with heavy mast years separated by two to four thin ones. That makes availability and price genuinely volatile in a way that has nothing to do with cosmetic demand. Several Shorea species, including Shorea stenoptera, are on the IUCN Red List, and the trees are also worth money as timber, so the argument for buying the seed fat is that it gives a standing tree a recurring value.

Sal is the most abundant of the three. Sal seed is collected at scale across the Indian sal belt as a minor forest product, much of it through state forest corporations and collector cooperatives, and it feeds a large industrial trade in cocoa butter equivalents. Cosmetic volumes are a rounding error on that, which is why sal is the cheapest of the three.

Ucuuba carries a real conservation argument. Virola trees have long been felled for plywood and broom handles, and seed collection is promoted in the Amazon as a use that pays more from a living tree than a felled one. The claim depends entirely on the specific supply chain, so verify it rather than repeat it. The questions to ask are in sourcing ingredients.

On cost, in rough bands: sal is usually at or below refined cocoa butter per kilogram, illipe runs above cocoa butter and roughly level with kokum, and ucuuba sits well above all of them. That last gap matters less than it sounds, because you use ucuuba at 3 percent rather than 20, so compare cost per finished unit rather than cost per kilogram.

Labelling, allergens and what to declare

The INCI names are Shorea Stenoptera Seed Butter, Shorea Robusta Seed Butter and, most commonly, Virola Sebifera Nut Butter or Virola Surinamensis Seed Butter. Confirm the exact name the supplier's documentation uses rather than assuming, because several Virola species are traded under the single word ucuuba and the INCI names are not interchangeable.

All three are seed or nut fats from species with no established position on the major allergen lists, which is not the same as an assurance of safety. There is very little clinical literature on sensitisation to any of them, and the ucuuba INCI name contains the word nut. If you are formulating for people who avoid tree nuts, the honest position is that these are not the botanical nuts that allergen labelling law is written around, that the evidence base is thin, and that a customer with a serious allergy should be told what is in the product rather than reassured about it. The general problem is set out in nut oil allergy.

Which one to buy, and when not to bother

The decision rule is short. Buy sal if you want cocoa butter hardness cheaply and can live with lot-to-lot variation. Buy illipe if you want the same thing tighter, and will pay for it and tolerate irregular availability. Buy ucuuba only for a specific structural problem, meaning a product that must hold its shape above 35 C, and then buy the smallest quantity your supplier will sell.

The honest limits. None of the three brings a sensory quality you cannot get elsewhere: they are structure, not character, and a reader looking for slip, cushion or an interesting skin feel should be reading about cupuacu butter instead. Illipe and sal are functionally so close to cocoa butter that if the chocolate note is not a problem for your product, they are a cost and a supply risk for no gain. Ucuuba's high melt is a liability in every product meant to melt on contact, which is most of them. And all three are niche enough that a supplier change can mean a real change in behaviour, so a formula built around one of them needs a re-test when the sack changes, not just a substitution on paper.

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