Reading the INCI on a Melt and Pour Soap Base

Melt and pour makers are in an odd spot compared to cold process soapers. You didn't formulate the base yourself, so you can't just calculate your saponification values and know exactly what's in your bar. You bought a pre-made base, melted it, added your own scent and colorant, and poured it. That base has its own INCI panel from the manufacturer, and understanding what's actually in it, rather than treating it as a black box, is the part a lot of makers skip past.

Start with the base's actual INCI list

Every reputable melt and pour base supplier provides an ingredient declaration, either on their own packaging, their SDS, or their product spec sheet. This is your starting point, not an assumption based on the base's marketing name. "Clear Glycerin Soap Base" or "Goat Milk MP Base" are trade descriptions, not INCI declarations, and you need the real one from the supplier before you can build your own notification on top of it.

What a typical base INCI list actually contains

A common clear glycerin melt and pour base often includes something like this kind of ingredient set (always confirm against your specific supplier's actual documentation rather than assuming this matches yours exactly):

Typical INCI entry	Common function
Sodium Stearate	Saponified base surfactant
Propylene Glycol or Glycerin	Humectant, clarity agent
Sorbitol	Humectant, supports clarity
Sodium Laureth Sulfate	Co-surfactant, lathering
Water (Aqua)	Solvent
Stearic Acid	Structuring
Sodium Chloride	Viscosity adjustment
Titanium Dioxide	Opacifier, only in white or opaque bases

Some bases branded around "true soap" characteristics lean more heavily on saponified fatty acid salts like sodium tallowate or sodium cocoate, while glycerin-forward clear bases lean more on humectants and clarity agents. Goat milk bases add milk-derived ingredients to that list. Every supplier's formula is genuinely different, which is exactly why you need their specific declaration rather than assuming one base's list applies to another.

Carrying the base list onto your own notification

Once you know what's in the base, your notification needs to reflect the finished bar you're actually selling, meaning the base's ingredients plus whatever you added. That typically includes:

• Fragrance or essential oils: added at your own percentage, on top of the base
• Colorants: whether synthetic or natural, at your own usage rate
• Any additives: exfoliants, botanical inclusions, extra oils or butters melted in

The base's own ingredients get listed at their concentration within the base, adjusted for how much base makes up your finished bar. If your finished bar is 92% base and 8% your own additions (fragrance, colorant, botanical), each base ingredient's real concentration in your finished product is its percentage within the base multiplied by that 92%, not its raw percentage as it existed in the base alone.

Fragrance oils need the same allergen attention as anywhere else

If you're adding a fragrance oil to your melt and pour base, don't treat it as exempt from allergen disclosure just because the base itself is pre-made. Fragrance oils and essential oils commonly carry limonene, linalool, citronellol, geraniol, eugenol, or coumarin, and Canada's disclosure requirements are phasing in on a clear schedule: List 1 allergens become mandatory on the CNF and label starting April 12, 2026, and List 2 follows August 1, 2026. For soap, which is rinse-off, the disclosure threshold is above 0.01% (100 ppm). Calculate your fragrance's allergen content at your actual use rate in the finished bar, not at the fragrance oil's own concentrated form.

Is it actually a cosmetic, or does "true soap" apply

This is worth stating plainly since melt and pour makers ask it constantly: a soap sold with only a cleansing claim, made as an alkali salt of fatty acids, can be treated differently from a cosmetic in some frameworks. But melt and pour bases blended with glycerin, sulfates, and other non-saponified ingredients often aren't "true soap" in that narrower sense to begin with, and the moment you add a claim like moisturizing, exfoliating, or skin-softening beyond basic cleansing, you're squarely in cosmetic territory regardless of the base's composition. Most melt and pour bars on the market are marketed with exactly those kinds of claims, which means most melt and pour soapers are filing as a cosmetic, not skipping notification under a true-soap exemption.

Getting from base label to filed notification

The tedious part isn't understanding that you need the base's real ingredient list. It's doing the percentage math correctly once you combine a pre-made base with your own additions, and making sure your fragrance's allergen content is calculated at your actual finished-bar concentration. Cosmetic Comply takes your base's INCI declaration and your own additions, works out the real finished-product concentrations, screens everything against the Cosmetic Ingredient Hotlist, and files your Cosmetic Notification Form with a reviewer checking the math before it goes out.