Shampoo formulation ingredients work together to clean the scalp and hair. Some remove oil and dirt. Others help control foam, thickness, scent, and how the hair feels after washing.
A useful formula starts with a clear goal. A daily shampoo for fine hair may need a light feel. A shampoo for dry hair may need more conditioning. The same ingredient list will not suit every product.
In this guide, we explain the main ingredient groups, show a sample formula, and cover the steps brands can take before launch.
What Are the Main Shampoo Formulation Ingredients?
Most liquid shampoos use water and a blend of cleansing agents. They may also contain ingredients that improve hair feel, protect the product, or create a certain look.
The table below shows the main groups found in many shampoo formulas.
| Ingredient group | What it does | Examples |
|---|---|---|
| Water | Acts as the main carrier. | Purified water, deionized water |
| Primary surfactants | Help remove oil, dirt, and buildup. | Sodium laureth sulfate, sodium lauroyl sarcosinate |
| Secondary surfactants | Help adjust foam, cleansing, and texture. | Cocamidopropyl betaine, sodium cocoamphoacetate |
| Conditioning agents | Help hair feel smoother and easier to comb. | Polyquaternium-10, conditioning guar |
| Humectants | Help attract and retain water. | Glycerin, propanediol |
| Thickeners | Adjust the thickness of the product. | Sodium chloride, hydroxyethylcellulose |
| Preservatives | Help protect the product from microbial contamination. | Phenoxyethanol-based blends |
| pH adjusters | Bring the formula into its intended pH range. | Citric acid, sodium hydroxide solution |
| Chelating agents | Bind metal ions that may affect the formula. | Disodium EDTA, sodium gluconate |
| Fragrance and color | Give the shampoo its scent and appearance. | Cosmetic fragrance, permitted colorants |
Not every shampoo needs every group. A fragrance-free shampoo does not need perfume. A clear shampoo may not need an ingredient that creates a pearl-like look.
The goal is not to use as many ingredients as possible. Each one should have a reason to be in the formula.
How Do Shampoo Surfactants Work?
Surfactants are the main cleansing agents in shampoo. They help lift oil and dirt so that water can rinse them away. They also affect the amount and feel of the foam.
Most shampoos use a blend of surfactants. One may provide much of the cleansing. Another may help adjust the foam or thickness.
Primary Surfactants
Primary surfactants do much of the cleaning. Sodium laureth sulfate is a common example. Other options include sodium lauroyl sarcosinate and sodium cocoyl isethionate.
The right choice depends on the desired cleansing level and the type of shampoo. Cost, supply, and the other ingredients also matter.
A formulator does not judge a shampoo by one cleanser alone. The full blend determines how the product performs.
Secondary Surfactants
Secondary surfactants support the main cleanser. Cocamidopropyl betaine is one example. It is often used to help adjust foam and thickness.
Other options include sodium cocoamphoacetate and certain glucosides. Each material has its own properties. The supplier’s raw material details can help the formulator choose a suitable grade.
What Does Surfactant Active Matter Mean?
Some surfactants are supplied as a mix of active material and water. The amount added to the formula is therefore not always the same as the amount of active cleanser.
For example, imagine adding 10% of a surfactant solution that contains 30% active matter. That solution adds 3% active surfactant to the finished formula.
This matters when comparing two raw materials. Two products may have the same ingredient name but different active levels. Ask the supplier for the details before comparing their cost or use level.
For more on surfactants and product design, see Stepan’s shampoo formulation guide.
Are Sulfate-Free Surfactants Always Milder?
No. A sulfate-free label tells you that certain ingredients are absent. It does not prove how mild the finished shampoo will feel.
In the same way, a sulfate in a formula does not automatically make the product too harsh. The blend, concentration, other ingredients, and way it is used all matter.
Start with the needs of the target customer. Then test the finished shampoo for its cleansing performance and feel.
What Are Conditioning Ingredients in Shampoo?
Many people want a shampoo that cleans well and leaves hair easy to manage. Conditioning ingredients help support that second goal.
They may improve wet combing, reduce static, or make the hair feel smoother. The effect depends on the ingredient and the full formula.
Conditioning Polymers
Conditioning polymers can help reduce friction between hair strands. Examples include polyquaternium-10 and guar hydroxypropyltrimonium chloride.
The formulator should check how these materials work with the surfactants. Too much conditioning material may affect clarity or make fine hair feel heavy.
Silicones and Plant Oils
Some shampoos use silicones, such as dimethicone, to help hair feel smooth. A silicone-free shampoo can use other conditioning agents to create a different feel.
Plant oils can also be used in some products. Oil does not mix easily with water, so the formula may need a way to keep it evenly dispersed.
More oil is not always better. Too much can affect foam, clarity, or the feel of fine hair. Test the amount in the complete shampoo.
Humectants and Proteins
Glycerin and propanediol are common humectants. They help attract water. Panthenol and hydrolyzed proteins are also used in some shampoos to improve the feel of hair.
For more on products designed for dry hair, read our guide to hydrating shampoo.
What Other Ingredients Help a Shampoo Work?
Thickeners
Thickeners control how a shampoo pours and spreads. Salt can thicken some surfactant blends. Other formulas use polymers or gums.
Salt does not work the same way in every shampoo. In some blends, adding too much can make the product thinner. A formulator should test the full formula before setting the amount.
Preservatives
Water-based shampoos need a suitable preservation strategy. Preservatives help protect the product from bacteria, yeast, and mold during storage and use.
The right system depends on the formula, pH, packaging, and target market. Adding a preservative is only the first step. The finished shampoo also needs suitable testing.
The FDA’s guide to microbiological safety explains how cosmetics can become contaminated and why preservation matters.
pH Adjusters
Citric acid and other pH adjusters help bring the shampoo into its intended range. Many shampoos are mildly acidic, but no single pH suits every formula.
The chosen range must work with the surfactants and the preservative system. Measure the pH of the finished product. Check it again during stability testing.
Chelating Agents
Chelating agents bind certain metal ions that may enter a formula through water or raw materials. This can help support product stability.
Disodium EDTA and sodium gluconate are examples. The formulator should choose an option that suits the rest of the shampoo.
Fragrance, Color, and Appearance
Fragrance and color help a shampoo match a brand’s style. Some brands prefer a clear gel. Others want a creamy or pearl-like product.
These choices can affect the formula. A fragrance may change thickness or clarity. Test the exact scent and color with the final base before approving the product.
How to Choose Ingredients for Different Shampoo Types
Start with the intended user and the result they want. Then choose a cleansing and conditioning system that supports that goal.
Daily Shampoo
A daily shampoo should provide the level of cleansing the target user needs. It should also leave hair comfortable to manage after repeated washes.
Consider the target hair type, the amount of styling product users apply, and how often they wash. Test foam, rinse feel, and hair feel over more than one wash.
Shampoo for Dry Hair
A shampoo for dry hair may use a conditioning system to improve softness and combing. Humectants, polymers, or oils may be part of the formula.
The blend still needs to cleanse well. Test whether the product rinses easily and whether the hair feels smooth without unwanted residue.
Shampoo for Fine Hair
Fine hair may need a lighter finish. A brand can ask the formulator to test a lower level of conditioning material or a different conditioning system.
Compare samples after the hair has dried. A product that feels rich in the shower may feel too heavy once the hair is styled.
Shampoo for Oily Hair
A shampoo for oily hair should remove the amount of oil and buildup expected for its target users. The aim is a clean feel without making the scalp uncomfortable.
Do not choose a surfactant based only on its reputation as “strong” or “mild.” Test the full blend and the suggested washing routine.
Shampoo for Color-Treated Hair
For color-treated hair, decide what the product should do and what claims you want to make. The team may test cleansing and conditioning alongside color-related performance.
A sulfate-free claim alone does not prove that a shampoo protects color. Ask what testing supports the finished product’s claims.
Anti-Dandruff Shampoo
An anti-dandruff product may require specific active ingredients and a different review from an ordinary cosmetic shampoo. The rules depend on the country where it will be sold.
Discuss the intended market and claims with your manufacturer at the start. Do not assume that adding a plant extract is enough to support a treatment claim.
Example Shampoo Formula
The table below shows how a basic liquid shampoo formula can be organized. The amounts are percentages by weight.
This is an educational example, not a finished commercial formula. A qualified formulator must review the raw materials, process, pH, and test results before production.
| Ingredient | Function | Amount by weight |
|---|---|---|
| Purified water | Carrier | 77.4% |
| Sodium laureth sulfate solution, 30% active matter | Primary surfactant | 15.0% |
| Cocamidopropyl betaine solution, 30% active matter | Secondary surfactant | 5.0% |
| Glycerin | Humectant | 1.0% |
| Phenoxyethanol and ethylhexylglycerin preservative blend | Preservation | 1.0% |
| Sodium chloride | Thickness adjustment | 0.5% |
| Disodium EDTA | Chelating agent | 0.1% |
| Total | 100.0% |
The two surfactant solutions provide 6% total active surfactant. The first contributes 4.5%, and the second contributes 1.5%.
The example has no added fragrance or color. If a pH adjuster is needed, the formulator must calculate its amount and reduce the water accordingly. The final formula must still total 100%.
The salt level is only an example. It may not give the desired thickness with every blend. The preservation system must also be checked in the finished product.
How Is Shampoo Manufactured?
The exact process depends on the formula and the factory equipment. A project may follow these broad steps:
- Prepare the water phase: Measure the water and add suitable water-phase ingredients.
- Add the surfactants: Add the cleansers in the order set by the formulator.
- Add supporting ingredients: Mix in the conditioners and other selected materials.
- Check pH and thickness: Measure the batch and make needed adjustments.
- Complete quality checks: Confirm that the batch meets the agreed specifications before filling.
Some ingredients need heat or special mixing. Others should be added after the batch cools. Follow the instructions for the raw materials and the approved formula.
Mixing can also change when a sample moves from a small beaker to a large tank. The team should review mixing speed, temperature, and processing time during scale-up.
For the wider process, read our OEM shampoo guide for private label brands.
How to Test a Shampoo Formula
A good-looking sample is only the start. The finished shampoo should be checked in its intended pack and under suitable storage conditions.
- Appearance: Check color, clarity, odor, and signs of separation.
- pH: Confirm that the product stays within its target range.
- Viscosity: Measure thickness using an agreed method and temperature.
- Stability: Observe changes over time and under selected conditions.
- Microbial quality: Check that the product meets suitable microbial limits.
- Preservative efficacy: Assess the preservation system in the finished formula.
- Pack compatibility: Check for leaks and unwanted changes to the bottle or product.
- Performance: Assess cleansing, foam, rinsing, combing, and hair feel.
Agree on the test plan and pass criteria with your manufacturer. The right tests depend on the formula, packaging, claims, and sales markets.
How to Compare Shampoo Samples
Ask the manufacturer what differs between samples. One may use a different surfactant blend. Another may have a lighter conditioner or a different scent.
Compare each sample under the same conditions. Use the same amount, the same water temperature, and a similar washing routine. Record how the product looks and feels.
Check the foam during washing. Note how easily the shampoo rinses out. Then check wet combing and how the hair feels once dry.
Also use the intended bottle or a similar pack. A formula that pours well from an open cup may be hard to dispense through a small opening.
Share clear feedback with the manufacturer. Instead of saying “make it better,” explain the change you want. For example, ask for less scent, a thinner texture, or a lighter feel after drying.
Common Shampoo Formulation Problems
Why Did the Shampoo Become Too Thin?
Salt, fragrance, temperature, or a change in surfactants can affect thickness. Review recent changes and test the complete blend. Adding more salt is not always the answer.
Why Did a Clear Shampoo Turn Cloudy?
Fragrance, oils, or other ingredients may not mix fully with the base. Temperature and pH can also affect clarity. The formulator may need to adjust the ingredients or process.
Why Does the Shampoo Feel Too Drying?
The cleansing blend may not suit the target user or washing routine. Review the surfactants, their total level, and the conditioning system. Test the revised shampoo as a complete product.
Why Does the Shampoo Separate?
Some ingredients may not work well together, or they may not have been mixed well enough. Storage conditions can also reveal a stability problem. Review the formula and process before making changes.
How to Brief a Private Label Shampoo Manufacturer
A clear brief helps your manufacturer choose a starting point. Before asking for a quote or sample, prepare these details:
- Your target customer and hair type
- The main purpose of the shampoo
- The claims you want to make
- Ingredients you want to include or avoid
- Your preferred scent, texture, and appearance
- The bottle size and packaging style
- Your sales markets and planned order quantity
- Your target cost and launch date
Share the brief with a private label shampoo manufacturer. The team can review your formula goals, packaging, tests, and production plan.
Ask which test reports and product documents will be available. If you plan to sell in several countries, review the formula, label, and claims for each market.
Ingredients and packaging both affect the final price. Our guide to OEM shampoo cost explains the main points to include in your budget.
If you are comparing suppliers, read how to choose a hair care manufacturer for questions about samples, production, and support.
Frequently Asked Questions
What is the main ingredient in liquid shampoo?
Water is often the largest ingredient by weight. Surfactants provide the main cleansing function. Their type and amount vary by formula.
Can shampoo be made without sulfates?
Yes. A formulator can choose a sulfate-free surfactant blend. The finished shampoo still needs tests for cleansing, foam, stability, and user experience.
Are natural shampoo ingredients always gentler?
No. Natural origin alone does not determine how a product will feel. Both natural and synthetic ingredients should be selected and tested as part of the full formula.
Does shampoo need a preservative?
A water-based shampoo generally needs a suitable preservation system. The system should be checked through testing of the finished product.
How many ingredients should a shampoo contain?
There is no ideal number for every shampoo. A formula should contain what it needs for its intended performance, stability, and user experience. Each ingredient should have a clear role.
Can I use the example formula to sell shampoo?
The example explains formula structure. A qualified formulator must review and develop it before commercial use. The finished product also needs suitable testing and review for each target market.
