Ingredient · Occlusive Lipid
Mineral Oil
INCI · Paraffinum Liquidum
Related names and forms: Mineral Oil. This list does not indicate synonyms or exact ingredient matches.
Mineral oil (INCI: Paraffinum Liquidum; Mineral Oil) is an inert hydrocarbon mixture obtained from petroleum and refined to high purity. It is not a single molecule, but a hydrocarbon fraction brought to a defined purity grade. Cosmetics use it as an occlusive or emollient associated with reducing signs of moisture loss at the surface. Mineral oil is one of the ingredients most subject to misleading generalisations: 'harmful because it is petroleum-derived' usually draws on unrefined crude industrial oil. Cosmetic-grade mineral oil, however, is highly refined and assessed within a regulatory framework with defined purity conditions for cosmetic use. Klaris considers it in the context of cosmetic purity, not alarm. Labels list 'Paraffinum Liquidum' or 'Mineral Oil'. As a defined mixture or fraction, it has no single INCI-equivalent compound CID in PubChem. A compound/name query returns 404; compound/name queries for petrolatum and paraffin also return 404, meaning none of these terms is a single-compound equivalent. The reference framework is provided through evidenceNotes.
i. Cosmetic Functions
Frequently Discussed Effects
The following headings summarise areas of effect frequently discussed in the literature; visible results in each area require regular use and a suitable formula.
Occlusive Film
Forms a thin film on the skin's surface, associated with reducing signs of transepidermal moisture loss.
Inert and Odourless
Its non-reactive structure makes it common in formulas for sensitive profiles and in baby care.
Texture and Stability
A foundational lipid adding slip and long-term shelf-life stability to a formula.
Mechanism
What Happens Within the Skin?
The following points summarise mechanisms from dermocosmetic literature in plain English. Klaris presents them as background information to help readers understand the context, not as medical claims.
Step 1
Occlusive Film
Forms a thin film on the skin's surface, associated with reducing signs of transepidermal moisture loss.
Step 2
Inert and Non-Reactive
Its non-reactive, odourless structure makes it common in formulas for sensitive profiles and baby care.
Step 3
Hydrocarbon Fraction (Mixture)
Not a single molecule, but a hydrocarbon mixture refined to a particular purity grade.
Step 4
Refining and Purity Grade
Cosmetic grade is highly refined and assessed under defined purity conditions for cosmetic use, separately from crude industrial fractions.
Step 5
Texture and Shelf Life
A foundational lipid that adds slip and long-term shelf-life stability to a formula.
ii. Role in the Formula
How Is It Read on a Label?
Cosmetic-grade mineral oil is refined to high purity and assessed against defined purity conditions for cosmetic use. It features as an occlusive or emollient in creams, lotions, cleansers and baby care. The important label-reading distinction is that refined cosmetic-grade oil and crude industrial oil are not the same and are assessed separately.
A Closer Look · pH, Stability, Synergy
Mineral oil provides a reliable occlusive or emollient foundation in formulation. Its inert, odourless structure and practical resistance to oxidation make it common in formulas for sensitive profiles and baby care. Purity grade is the most critical consideration. Much of the 'mineral oil is harmful' narrative is based on unrefined crude industrial petroleum fractions; cosmetic-grade mineral oil is highly refined, and the regulatory framework defines purity conditions for cosmetic use. 'Petroleum-derived means harmful' is therefore a categorical generalisation. Klaris assesses cosmetic purity with restraint, without turning it into alarm. This also does not mean the ingredient is 'perfect under every condition': its occlusive nature may warrant extra care in heavy formulas for very oily or congestion-prone profiles. A second common misconception centres on 'natural versus synthetic'. Mineral oil is one of the most generalised-about examples, yet suitability for a profile depends on purity, formulation role and target profile, not whether the source is natural or synthetic. As a defined hydrocarbon mixture, mineral oil is assessed through its ingredient family and formula context, not a single chemical CID record. Klaris considers purity context, texture and target profile as a whole.
Typical Concentration Range
1% - 30% (depending on product type)
Ingredient Family
Oils and Lipids
iii. Sensitivity Advisory
A Note on Extra Care in Context
Its occlusive nature may warrant extra care in heavy formulas for very oily or congestion-prone profiles, while high-purity cosmetic mineral oil is generally described as low-irritation. The common narrative that mineral oil is unsuitable for cosmetics is usually a generalisation based on unrefined industrial oil; cosmetic grade is assessed separately.
A sensitivity advisory is not an instruction for use; where individual health circumstances, pregnancy or known sensitivities are involved, discussing the decision with your doctor may be a more contextual approach.
Common Misconceptions
Frequently Confused Points
Common Belief
Mineral oil is harmful to skin because it is petroleum-derived.
A More Contextual Reading
The 'harmful' narrative usually draws on unrefined crude industrial oil. Cosmetic-grade mineral oil is highly refined and assessed under defined purity conditions for cosmetic use. Cosmetic grade and crude industrial oil are not the same.
Common Belief
Mineral oil clogs pores and 'suffocates' skin.
A More Contextual Reading
It is an occlusive lipid and may warrant extra care in heavy formulas for very oily or congestion-prone profiles. High-purity cosmetic mineral oil is generally described as low-irritation. 'Suffocates' is a categorical generalisation, not a contextual assessment.
Common Belief
Mineral oil contributes nothing to skin; it just sits on top.
A More Contextual Reading
An occlusive film has a functional role associated with reducing signs of transepidermal moisture loss. 'Just sits on top' dismisses that function. Function and 'nourishment' are different things.
Common Belief
Because it is synthetic, it is worse than natural oils.
A More Contextual Reading
Suitability is determined by purity, formulation role and target profile, not the natural/synthetic distinction. Mineral oil is one of the most generalised-about examples in this debate.
Scientific Basis
Sources and Their Scope
The following headings indicate areas of research; they are not citations of a specific publication or confirmation that every statement on this page has been verified. The links provided should be read with their individual scope in mind.
- International INCI / CosIng database
- Regulatory authority documents (EU SCCS, TİTCK)
- Cosmetic ingredient safety assessment groups
TİTCK, SCCS and similar regulatory authorities are mentioned in the context of publicly available regulation; Klaris has no official endorsement, partnership or collaboration with these institutions.
Starting Points for Independent Research
These links lead to official databases and serve as starting points for searches.
iv. Related Ingredients
Ingredients Often Read Together
v. Oils and Lipids Family
Other Ingredients in the Same Family
Explore ingredients in the same functional family to deepen your reading of formulas.
vi. Academy · Related Reading
For a Closer Look
Klaris · Example Analyses
How Does Mineral Oil Feature
in Your Products?
Explore product examples to see the ingredient list, general assessment and match score that changes with the example profile together.
Masked products and example profiles, not a personal analysis. Profile matching in the app is part of Klaris Premium. The app is currently available in Turkish. An English version is in preparation.