The Ultimate Cosmetic Ingredient Usage Guide: Practical Maximum Use Levels for Skin Care Formulators
Whether you are a beginner cosmetic chemist, an R&D scientist, a freelance formulator, or developing products for your own skin care brand, one of the most common questions is:
"How much of each ingredient should I use?"
There is no single universal answer. Every ingredient has a recommended use range, a practical maximum, and in some cases a legal maximum established by cosmetic regulations.
Many ingredients technically work at much higher concentrations than what commercial products use. However, excessive levels often lead to poor texture, instability, irritation, crystallization, high cost, or manufacturing difficulties.
This guide compiles the most commonly used cosmetic ingredients into one practical reference for formulators. It is intended for creams, lotions, serums, gels, cleansers, masks, and toners.
Important: The percentages below are practical formulation guidelines based on commercial cosmetic formulations. Always verify supplier recommendations and comply with the cosmetic regulations in the country where your products will be sold.
Understanding the Three Types of Maximum Levels
Before selecting ingredient levels, understand these three concepts.
Recommended Use Level
The concentration where an ingredient performs efficiently while maintaining good aesthetics.
Practical Maximum
The highest concentration commonly used in commercial formulations before texture, stability, or cost become problematic.
Regulatory Maximum
The legal limit established by cosmetic regulations. Some ingredients have strict legal limits, while others have no specific maximum.
Best Humectants and Moisturizers for Skin Care Formulation
Humectants attract water into the skin and help improve hydration.
| Ingredient | Typical (%) | Practical Maximum (%) |
|---|---|---|
| Glycerin | 2–10 | 20 |
| Propylene Glycol | 2–8 | 15 |
| Butylene Glycol | 2–8 | 10 |
| Pentylene Glycol | 1–5 | 5 |
| 1,3-Propanediol | 2–8 | 15 |
| Sorbitol | 2–8 | 15 |
| Betaine | 1–5 | 10 |
| Sodium PCA | 0.2–2 | 5 |
| Sodium Lactate | 1–3 | 5 |
| Urea | 2–10 | 20 |
| Trehalose | 1–5 | 10 |
| Erythritol | 1–5 | 10 |
| Xylitol | 1–5 | 10 |
Practical Notes
- Glycerin above 15–20% often becomes sticky.
- Propylene glycol improves penetration but may increase irritation in sensitive skin.
- Betaine provides hydration with a lighter skin feel.
Hyaluronic Acid Ingredients for Cosmetic Formulations
These polymers provide hydration while also modifying viscosity.
| Ingredient | Typical Use Level (%) | Practical Maximum (%) |
|---|---|---|
| Sodium Hyaluronate | 0.05–0.3 | 1 |
| Hydrolyzed Sodium Hyaluronate | 0.05–0.2 | 0.5 |
| Hyaluronic Acid | 0.05–0.2 | 0.5 |
| Sodium Acetylated Hyaluronate | 0.02–0.2 | 0.5 |
| Crosslinked Hyaluronic Acid | 0.05–0.3 | 0.5 |
| Hydrolyzed Hyaluronic Acid | 0.05–0.2 | 0.5 |
| Sodium Hyaluronate Crosspolymer | 0.05–0.3 | 0.5 |
| Potassium Hyaluronate | 0.05–0.3 | 0.5 |
| Hydrolyzed Sodium Hyaluronate Crosspolymer | 0.02–0.2 | 0.5 |
| Hydrolyzed Hyaluronic Acid Crosspolymer | 0.02–0.2 | 0.5 |
| Dimethylsilanol Hyaluronate | 0.05–0.5 | 1 |
| Hyaluronic Acid Dimethylsilanol | 0.05–0.5 | 1 |
| Sodium Hyaluronate Dimethylsilanol | 0.05–0.5 | 1 |
| Hyaluronic Acid + Sodium Hyaluronate Blend | 0.05–0.5 | 1 |
| Multi-Molecular-Weight Hyaluronic Acid Blend | 0.05–0.5 | 1 |
Natural Gums Used as Cosmetic Thickeners
These are widely used to thicken aqueous formulations.
| Ingredient | Typical (%) | Practical Maximum (%) |
| Xanthan Gum | 0.15–0.5 | 1 |
| Guar Gum | 0.1–0.5 | 1 |
| Sclerotium Gum | 0.2–1 | 1.5 |
| Tara Gum | 0.2–1 | 2 |
| Locust Bean Gum | 0.2–1 | 2 |
| Konjac Gum | 0.2–1 | 2 |
Notes
Higher gum levels generally produce slimy textures and reduce spreadability.
Cellulose Thickeners for Skin Care Products
| Ingredient | Typical Use Level (%) | Practical Maximum (%) |
|---|---|---|
| Hydroxyethyl Cellulose (HEC) | 0.2–1 | 2 |
| Hydroxypropyl Methylcellulose (HPMC) | 0.2–1 | 2 |
| Hydroxypropyl Cellulose (HPC) | 0.2–1 | 2 |
| Sodium Carboxymethyl Cellulose (Sodium CMC) | 0.2–1 | 2 |
| Methylcellulose (MC) | 0.2–1 | 2 |
| Carboxymethyl Cellulose (CMC) | 0.2–1 | 2 |
| Hydroxyethyl Methylcellulose (HEMC) | 0.2–1 | 2 |
| Hydroxypropyl Guar | 0.1–1 | 2 |
| Cellulose Gum | 0.2–1 | 2 |
| Ethylcellulose | 0.5–3 | 5 |
| Microcrystalline Cellulose | 0.5–5 | 10 |
| Hydroxypropylcellulose (High Viscosity Grade) | 0.2–1 | 2 |
| Hydroxyethylcellulose (High Viscosity Grade) | 0.2–1 | 2 |
Note: Actual use levels depend heavily on polymer viscosity grade, particle size, hydration method, electrolytes, surfactants, pH, and the desired final viscosity.
Acrylic Polymers for Modern Cosmetic Formulations
Modern cosmetic formulations rely heavily on synthetic polymers because they produce elegant textures.
| Ingredient | Typical (%) | Practical Maximum (%) |
| Carbomer | 0.15–0.5 | 1 |
| Acrylates Copolymer | 0.5–3 | 5 |
| Sodium Polyacrylate | 0.2–1 | 2 |
| Polyacrylate Crosspolymer-6 | 0.2–1 | 2 |
| Acrylates/C10-30 Alkyl Acrylate Crosspolymer | 0.15–0.5 | 1 |
| Ammonium Acryloyldimethyltaurate/VP Copolymer | 0.2–1 | 2 |
| Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer | 0.2–2 | 3 |
Common Emulsifiers Used in Creams and Lotions
| Ingredient | Typical Use Level (%) | Practical Maximum (%) |
|---|---|---|
| Glyceryl Stearate | 1–4 | 5 |
| Glyceryl Stearate SE | 2–6 | 8 |
| PEG-100 Stearate | 1–4 | 5 |
| Ceteareth-20 | 1–5 | 8 |
| Olivem 1000 | 2–8 | 10 |
| Montanov 68 | 2–8 | 10 |
| Polysorbate 20 | 0.5–3 | 5 |
| Polysorbate 60 | 0.5–5 | 10 |
| Polysorbate 80 | 0.5–5 | 10 |
| Cetearyl Glucoside | 1–5 | 8 |
| Cetyl Glucoside | 1–5 | 8 |
| Sorbitan Olivate | 1–5 | 8 |
| Sorbitan Stearate | 0.5–3 | 5 |
| Sorbitan Oleate | 0.5–3 | 5 |
| PEG-40 Stearate | 1–5 | 8 |
| Steareth-20 | 1–5 | 8 |
| Glyceryl Oleate | 0.5–5 | 8 |
| Polyglyceryl-3 Methylglucose Distearate | 1–5 | 8 |
| Polyglyceryl-6 Distearate | 1–5 | 8 |
| Polyglyceryl-3 Stearate | 1–5 | 8 |
| Polyglyceryl-4 Oleate | 1–5 | 10 |
| Behenyl Alcohol/Glyceryl Stearate/Stearyl Alcohol blend | 2–8 | 10 |
Fatty Alcohols and Waxes in Skin Care Formulations
| Ingredient | Typical Use Level (%) | Practical Maximum (%) |
|---|---|---|
| Cetyl Alcohol | 0.5–4 | 6 |
| Stearyl Alcohol | 0.5–4 | 6 |
| Cetearyl Alcohol | 1–5 | 8 |
| Behenyl Alcohol | 0.5–3 | 5 |
| Myristyl Alcohol | 0.5–3 | 5 |
| Lauryl Alcohol | 0.5–3 | 5 |
| Cetostearyl Alcohol | 1–5 | 8 |
| Isostearyl Alcohol | 0.5–5 | 8 |
| Oleyl Alcohol | 0.5–5 | 10 |
| Behenyl Behenate | 1–5 | 10 |
| Beeswax | 1–10 | 20 |
| Candelilla Wax | 1–8 | 15 |
| Carnauba Wax | 0.5–5 | 10 |
| Rice Bran Wax | 1–5 | 10 |
| Sunflower Wax | 1–5 | 10 |
| Synthetic Beeswax | 1–10 | 20 |
| Microcrystalline Wax | 1–10 | 20 |
| Paraffin Wax | 1–10 | 20 |
| Ozokerite | 1–10 | 20 |
| Hydrogenated Castor Oil | 1–10 | 20 |
| Japan Wax | 1–5 | 10 |
Popular Cosmetic Emollients for Skin Care Products
| Ingredient | Typical Use Level (%) | Practical Maximum (%) |
|---|---|---|
| Caprylic/Capric Triglyceride | 2–15 | 40 |
| Squalane | 2–10 | 30 |
| Triheptanoin | 2–15 | 30 |
| Coco-Caprylate/Caprate | 2–15 | 30 |
| Isopropyl Myristate | 1–5 | 10 |
| Isopropyl Palmitate | 1–5 | 10 |
| C12-15 Alkyl Benzoate | 2–15 | 30 |
| Dimethicone | 0.5–5 | 20 |
| Cyclopentasiloxane | 2–10 | 30 |
| Mineral Oil | 2–20 | 80 |
| C13-14 Isoparaffin | 1–10 | 20 |
| Hydrogenated Polyisobutene | 1–10 | 30 |
| Polyisobutene | 1–10 | 30 |
| Isohexadecane | 1–10 | 20 |
| Dicaprylyl Carbonate | 2–15 | 30 |
| Dicaprylyl Ether | 2–15 | 30 |
| Ethylhexyl Palmitate | 1–10 | 20 |
| Ethylhexyl Stearate | 1–10 | 20 |
| Ethylhexyl Cocoate | 1–10 | 20 |
| Cetearyl Ethylhexanoate | 1–10 | 20 |
| Neopentyl Glycol Diheptanoate | 1–10 | 20 |
| Dibutyl Adipate | 1–10 | 20 |
| Diisopropyl Sebacate | 1–10 | 20 |
| Coco-Caprylate | 2–15 | 30 |
| Jojoba Esters | 1–10 | 20 |
| Jojoba Oil | 1–10 | 20 |
| Argan Oil | 1–10 | 20 |
| Sweet Almond Oil | 1–10 | 30 |
| Sunflower Seed Oil | 1–15 | 30 |
| Rosehip Seed Oil | 1–10 | 20 |
| Safflower Seed Oil | 1–15 | 30 |
| Grapeseed Oil | 1–10 | 20 |
| Olive Fruit Oil | 1–15 | 30 |
| Shea Butter | 1–15 | 30 |
| Mango Seed Butter | 1–15 | 30 |
| Cocoa Seed Butter | 1–15 | 30 |
| Hydrogenated Polydecene | 1–10 | 30 |
Common Cosmetic Preservatives and Their Usage Levels
| Ingredient | Typical Use Level (%) | Regulatory / Practical Maximum (%) |
|---|---|---|
| Phenoxyethanol | 0.5–1 | 1 |
| Ethylhexylglycerin | 0.2–0.8 | 1 |
| Sodium Benzoate | 0.2–0.5 | 1 |
| Potassium Sorbate | 0.1–0.3 | 0.6 |
| Benzyl Alcohol | 0.3–1 | 1 |
| Dehydroacetic Acid | 0.1–0.6 | 0.6 |
| Caprylyl Glycol | 0.2–1 | 1 |
| Chlorphenesin | 0.1–0.3 | 0.3 |
| Benzoic Acid | 0.1–0.5 | 0.5 |
| Sorbic Acid | 0.1–0.3 | 0.3 |
| Propylparaben | 0.1–0.3 | 0.14 |
| Methylparaben | 0.1–0.4 | 0.4 |
| Ethylparaben | 0.1–0.4 | 0.4 |
| Propylene Glycol | 1–5 | 10 |
| Phenylpropanol | 0.2–1 | 1 |
| Sodium Dehydroacetate | 0.1–0.6 | 0.6 |
| Potassium Benzoate | 0.1–0.5 | 1 |
| Triclosan | 0.1–0.3 | 0.3 |
| Iodopropynyl Butylcarbamate (IPBC) | 0.01–0.05 | 0.05 |
| Benzisothiazolinone (BIT) | 0.01–0.05 | 0.05 |
| Sodium Hydroxymethylglycinate | 0.2–0.5 | 0.5 |
| Hydroxyacetophenone | 0.1–1 | 1 |
| 1,2-Hexanediol | 0.5–2 | 5 |
| Caprylhydroxamic Acid | 0.1–0.5 | 0.5 |
| Glyceryl Caprylate | 0.2–1 | 1 |
| Glyceryl Undecylenate | 0.1–1 | 1 |
| Sodium Levulinate | 0.2–1 | 2 |
| Potassium Levulinate | 0.2–1 | 2 |
| Sodium Anisate | 0.1–1 | 2 |
| Pentylene Glycol | 1–5 | 10 |
Chelating Agents Used in Cosmetic Formulations
| Ingredient | Typical (%) | Practical Maximum (%) |
| Disodium EDTA | 0.05–0.2 | 0.5 |
| Tetrasodium EDTA | 0.05–0.2 | 0.5 |
| Sodium Phytate | 0.05–0.2 | 0.5 |
| Phytic Acid | 0.05–0.2 | 0.5 |
Common Vitamins Used in Skin Care Products
| Ingredient | Typical Use Level (%) | Practical Maximum (%) |
|---|---|---|
| Niacinamide | 2–5 | 10 |
| Panthenol | 0.5–2 | 5 |
| Tocopherol | 0.2–1 | 5 |
| Tocopheryl Acetate | 0.5–2 | 5 |
| Ascorbic Acid | 5–20 | 20 |
| Sodium Ascorbyl Phosphate | 1–5 | 5 |
| Magnesium Ascorbyl Phosphate | 3–10 | 10 |
| Ascorbyl Glucoside | 1–5 | 10 |
| 3-O-Ethyl Ascorbic Acid | 1–5 | 10 |
| Tetrahexyldecyl Ascorbate | 0.5–3 | 5 |
| Ascorbyl Palmitate | 0.1–2 | 5 |
| Retinol | 0.05–0.5 | 1 |
| Retinal | 0.01–0.1 | 0.2 |
| Retinyl Palmitate | 0.1–1 | 2 |
| Retinyl Acetate | 0.1–1 | 2 |
| Biotin | 0.01–0.1 | 0.5 |
| Riboflavin (Vitamin B2) | 0.01–0.1 | 0.5 |
| Pyridoxine HCl (Vitamin B6) | 0.01–0.5 | 1 |
| Thiamine HCl (Vitamin B1) | 0.01–0.1 | 0.5 |
| Folic Acid (Vitamin B9) | 0.01–0.1 | 0.5 |
| Cyanocobalamin (Vitamin B12) | 0.001–0.05 | 0.1 |
| Tocopheryl Linoleate | 0.1–2 | 5 |
| Tocopheryl Nicotinate | 0.1–2 | 5 |
Formulation note: Vitamin use levels can vary substantially depending on the derivative, purity, delivery system, stability, and intended claim.
Effective Brightening Ingredients for Skin Care Formulations
| Ingredient | Typical Use Level (%) | Practical Maximum (%) |
|---|---|---|
| Alpha-Arbutin | 1–2 | 2 |
| Arbutin | 1–3 | 5 |
| Kojic Acid | 1–2 | 2 |
| Kojic Dipalmitate | 1–5 | 10 |
| Tranexamic Acid | 2–5 | 5 |
| Glutathione | 0.1–2 | 5 |
| N-Acetyl Glucosamine | 2–5 | 10 |
| Azelaic Acid | 5–10 | 20 |
| Niacinamide | 2–5 | 10 |
| Licorice Root Extract | 0.2–2 | 5 |
| Dipotassium Glycyrrhizate | 0.1–1 | 2 |
| Undecylenoyl Phenylalanine | 0.5–2 | 5 |
| Phenylethyl Resorcinol | 0.1–0.5 | 1 |
| 4-Butylresorcinol | 0.1–0.5 | 1 |
| Hexylresorcinol | 0.1–1 | 2 |
| Alpha-Lipoic Acid | 0.1–1 | 2 |
| Magnesium Ascorbyl Phosphate | 3–10 | 10 |
| Sodium Ascorbyl Phosphate | 1–5 | 5 |
| Ascorbyl Glucoside | 1–5 | 10 |
| 3-O-Ethyl Ascorbic Acid | 1–5 | 10 |
| Tetrahexyldecyl Ascorbate | 0.5–3 | 5 |
| Mulberry Extract | 0.5–5 | 10 |
| Bearberry Extract | 0.5–5 | 10 |
| Morus Alba Root Extract | 0.5–5 | 10 |
| Rumex Extract | 0.5–5 | 10 |
| Alpha-Melight | 0.5–2 | 5 |
Exfoliating Acids Commonly Used in Skin Care
| Ingredient | Typical Use Level (%) | Practical Maximum (%) |
|---|---|---|
| Glycolic Acid | 3–10 | 20 |
| Lactic Acid | 2–10 | 15 |
| Mandelic Acid | 5–10 | 15 |
| Salicylic Acid | 0.5–2 | 2 |
| Azelaic Acid | 5–10 | 20 |
| Gluconic Acid | 1–10 | 15 |
| Gluconolactone | 1–10 | 20 |
| Lactobionic Acid | 1–10 | 15 |
| Malic Acid | 1–5 | 10 |
| Tartaric Acid | 1–5 | 10 |
| Citric Acid | 0.5–5 | 10 |
| Pyruvic Acid | 1–5 | 10 |
| Capryloyl Salicylic Acid (LHA) | 0.1–1 | 2 |
| Hydroxycaprylic Acid | 1–5 | 10 |
| Hydroxyethylpiperazine Ethane Sulfonic Acid (HEPES) | 1–5 | 10 |
| Succinic Acid | 0.5–5 | 10 |
| PHA Blend | 2–10 | 20 |
| AHA Blend | 3–10 | 20 |
| BHA Blend | 0.5–2 | 2 |
Formulation note: For acids, concentration alone does not determine exfoliating strength. pH, free-acid concentration, pKa, buffering, neutralization, contact time, and product type can substantially change performance and irritation potential.
Popular Botanical Extracts for Cosmetic Formulations
Most botanical extracts are used at relatively low concentrations.
| Ingredient | Typical Use Level (%) | Practical Maximum (%) |
|---|---|---|
| Green Tea Extract | 0.5–5 | 10 |
| Aloe Vera Extract | 1–10 | 20 |
| Centella Asiatica Extract | 0.5–5 | 10 |
| Licorice Extract | 0.2–2 | 5 |
| Chamomile Extract | 0.5–5 | 10 |
| Calendula Extract | 0.5–5 | 10 |
| Cucumber Extract | 1–5 | 10 |
| Rose Extract | 0.5–5 | 10 |
| Turmeric Extract | 0.1–2 | 5 |
| Ginger Extract | 0.1–2 | 5 |
| Ginseng Extract | 0.5–5 | 10 |
| Gotu Kola Extract | 0.5–5 | 10 |
| Witch Hazel Extract | 1–10 | 20 |
| Chamomile Flower Extract | 0.5–5 | 10 |
| Calendula Flower Extract | 0.5–5 | 10 |
| Rosemary Extract | 0.1–2 | 5 |
| Sage Extract | 0.1–2 | 5 |
| Green Coffee Extract | 0.5–5 | 10 |
| Hibiscus Extract | 0.5–5 | 10 |
| Pomegranate Extract | 0.5–5 | 10 |
| Grape Seed Extract | 0.1–2 | 5 |
| Bilberry Extract | 0.5–5 | 10 |
| Cranberry Extract | 0.5–5 | 10 |
| Blueberry Extract | 0.5–5 | 10 |
| Papaya Extract | 0.5–5 | 10 |
| Pineapple Extract | 0.5–5 | 10 |
| Licorice Root Extract | 0.2–2 | 5 |
| Mulberry Root Extract | 0.5–5 | 10 |
| Bearberry Extract | 0.5–5 | 10 |
| Neem Extract | 0.5–5 | 10 |
| Moringa Extract | 0.5–5 | 10 |
| Oat Extract | 0.5–5 | 10 |
| Marshmallow Root Extract | 0.5–5 | 10 |
| Calendula Extract | 0.5–5 | 10 |
| Lavender Extract | 0.5–5 | 10 |
| Eucalyptus Extract | 0.1–2 | 5 |
| Tea Tree Extract | 0.1–2 | 5 |
| Caffeine-Rich Green Coffee Extract | 0.5–5 | 10 |
Important: Botanical extract concentrations vary greatly depending on the extraction solvent, extract ratio, carrier, standardization, dry-matter content, and supplier specification. Therefore, these should be treated as formulation starting ranges rather than universal maximum limits.
Common Surfactants Used in Facial Cleansers and Body Washes
Suitable for facial cleansers and body washes.
| Ingredient | Typical Use Level (%) | Practical Maximum (%) |
|---|---|---|
| Sodium Methyl Cocoyl Taurate | 5–15 | 30 |
| Sodium Cocoyl Isethionate | 5–15 | 30 |
| Cocamidopropyl Betaine | 3–10 | 20 |
| Decyl Glucoside | 5–15 | 30 |
| Coco Glucoside | 5–15 | 30 |
| Lauryl Glucoside | 2–10 | 20 |
| Disodium Laureth Sulfosuccinate | 5–20 | 35 |
| Sodium Lauroyl Sarcosinate | 5–15 | 30 |
| Sodium Cocoyl Glutamate | 5–15 | 30 |
| Disodium Cocoyl Glutamate | 5–15 | 30 |
| Sodium Lauroyl Glutamate | 5–15 | 30 |
| Sodium Lauroyl Methyl Isethionate | 5–20 | 30 |
| Sodium Lauroyl Sarcosinate | 5–15 | 30 |
| Sodium Lauroyl Lactylate | 1–10 | 20 |
| Sodium Cocoamphoacetate | 5–20 | 30 |
| Disodium Cocoamphodiacetate | 5–20 | 30 |
| Sodium Coco-Sulfate | 5–20 | 30 |
| Sodium Lauryl Sulfoacetate | 5–15 | 30 |
| Sodium C14-16 Olefin Sulfonate | 5–20 | 30 |
| Sodium Lauroyl Methyl Isethionate | 5–20 | 30 |
| Sodium Lauryl Ether Sulfate (SLES) | 5–20 | 30 |
| Sodium Lauryl Sulfate (SLS) | 1–10 | 15 |
| Ammonium Lauryl Sulfate | 5–20 | 30 |
| Ammonium Laureth Sulfate | 5–20 | 30 |
| Sodium Lauroamphoacetate | 5–20 | 30 |
| Cocamide MEA | 1–5 | 10 |
| Cocamide MIPA | 1–5 | 10 |
| Cocamide DEA | 1–5 | 10 |
| Sodium Methyl Oleoyl Taurate | 5–15 | 30 |
| Sodium Cocoyl Methyl Taurate | 5–15 | 30 |
| Sodium Lauroyl Methyl Taurate | 5–15 | 30 |
| Sodium Cocoyl Glycinate | 5–15 | 30 |
| Potassium Cocoyl Glycinate | 5–15 | 30 |
| Sodium Lauroyl Glycinate | 5–15 | 30 |
| Sodium Cocoyl Sarcosinate | 5–15 | 30 |
| Sodium Methyl Cocoyl Taurate | 5–15 | 30 |
| Caprylyl/Capryl Glucoside | 2–10 | 20 |
| Caprylyl/Capryl Glucoside (and) Coco-Glucoside | 2–10 | 20 |
| Sodium Cocoyl Isethionate (and) Sodium Lauroyl Methyl Isethionate | 5–20 | 30 |
Important: Surfactants are usually compared more meaningfully by active matter (ASM) rather than raw-material percentage. A 10% addition of a 30% active surfactant solution provides only about 3% active surfactant. This distinction is especially important when developing cleansers and comparing formulations.
pH Adjusters Commonly Used in Cosmetic Formulations
| Ingredient | Typical Use Level (%) |
|---|---|
| Sodium Hydroxide | q.s. |
| Potassium Hydroxide | q.s. |
| Citric Acid | q.s. |
| Lactic Acid | q.s. |
| Triethanolamine | q.s. |
| Aminomethyl Propanol | q.s. |
| Aminomethyl Propanediol | q.s. |
| Sodium Citrate | 0.05–1 |
| Potassium Citrate | 0.05–1 |
| Sodium Lactate | 0.1–5 |
| Potassium Hydroxide Solution | q.s. |
| Sodium Bicarbonate | 0.1–2 |
| Sodium Carbonate | 0.05–1 |
| Potassium Carbonate | 0.05–1 |
| Tromethamine | q.s. |
| Arginine | 0.1–2 |
| AMP-95 | q.s. |
| Gluconic Acid | q.s. |
| Phosphoric Acid | q.s. |
| Hydrochloric Acid | q.s. |
| Acetic Acid | q.s. |
| Malic Acid | q.s. |
| Tartaric Acid | q.s. |
| Sodium Hydroxymethylglycinate | 0.1–0.5 |
| TEA (Triethanolamine) | q.s. |
| Sodium Lactate Solution | 0.1–5 |
Formulation note: q.s. means quantum satis — sufficient quantity to reach the desired pH. The amount required depends on the formulation's buffering capacity, acid/base strength, polymer system, and target pH.
Fragrance and Essential Oils Used in Skin Care Products
| Ingredient | Typical (%) | Practical Maximum (%) |
| Fragrance | 0.1–1 | 2 |
| Lavender Oil | 0.1–1 | 2 |
| Tea Tree Oil | 0.2–1 | 2 |
| Peppermint Oil | 0.05–0.5 | 1 |
| Lemon Oil | 0.05–0.5 | 1 |
How to Use This Guide
When developing a formulation:
- Start with the middle of the recommended use range.
- Increase only if testing shows a clear performance benefit.
- Evaluate viscosity, pH, stability, skin feel, and preservative efficacy after each adjustment.
- Confirm compatibility between ingredients, especially electrolytes, polymers, and surfactants.
- Verify regulatory limits for your target market before commercialization.
Successful cosmetic formulation is not about maximizing ingredient percentages. It is about balancing efficacy, stability, safety, sensory properties, and cost.
Many of the world's best-selling creams and serums achieve excellent performance using moderate concentrations because every ingredient is selected to work synergistically. A well-designed formula considers pH, processing method, raw material quality, compatibility, preservation, packaging, and stability—not just the concentration of individual ingredients.
Use this guide as a practical starting point, then refine your formulations through laboratory testing, stability studies, microbiological challenge testing, and real-world performance evaluations. Over time, building your own formulation database with observations on each raw material will become one of your most valuable assets as a cosmetic chemist.