Formulating Manual Dishwash Detergents

By Shoaib Arif, Pilot Chemical Co., Cincinnati, OH | March 4, 2011

An optimum hand dishwash liquid formula can be developed by using LAS, SLES and cocamidopropyl betaine and perhaps some cocamide DEA. Read on to learn how to develop a variety dishwash detergents.

Foaming and grease cutting are just a few requirements for detergents.Foam, viscosity and grease cutting power are some of the basic requirements for manual dishwash detergent. Go a little further than the basic formula and it may require good foam stability and a certain pH range. Still not satisfied? Try adding performance in hard water and cold temperatures. Want still more? Throw in quick rinsing and drying. For even more discerning consumers, add mildness and moisturizing effects. Or, how about adding benefits such as naturally-derived, DfE-approved and readily bio-degradable? Last, but not least, some formulators add aromatherapy and antibacterial effects.

Foaming and grease cutting are just a few requirements for detergents.
Let’s start with the basics—foam, viscosity and grease cutting—and create a very economical formula, one with the raw material cost of 5-10 cents per 16oz. So, if you can get a bottle, cap and label and the labor for about 15-25 cents, the total cost of a 16oz. dishwash detergent in a bottle ready to be shipped to a customer can be between 20-35 cents. The formula is simple. It has 95% water, 0.63% sodium hydroxide (50% solution), 2.4% DDBSA (Pilot’s Calsoft LAS-99), 1.2% cocamide DEA (Pilot’s Calamide C), 0.77% sodium chloride and preservatives and dye as required. The blending procedure is easy. Add the ingredients in the order listed with continuous mixing until a clear, smooth and homogenous batch is obtained that is free of lumps and particles. Adjust the pH to 8-9 with DDBSA or sodium hydroxide.

To make an economy formula, start with economy ingredients. DDBSA is one of the lowest cost anionic surfactants in its class, as is cocamide DEA. Together, these two ingredients bring the essentials of a manual dishwash performance attributes to the formula. DDBSA is generally sold as 95% plus active material. With today’s high shipping costs it is an obvious advantage. Cocamide DEA is also a high active material with no water or solvent in it. Neutralized DDBSA is an excellent foamer with good detergency and oily soil removal capabilities. Cocamide DEA adds foam enhancement and stability, emulsification and viscosity building properties. The formula listed above has a viscosity of 200 cp. at 70°F, as measured by Brookfield RV viscometer using spindle number 3 at 20 RPM. We can develop a wide range of formulas using essentially the DDBSA, sodium hydroxide and cocamide DEA and perhaps some tetrasodium EDTA or sodium citrate as builders for water softening. So, for example, using the two surfactants, caustic soda neutralized DDBSA (also called sodium alkyl benzene sulfonate) and cocamide DEA and, optionally, some EDTA and salt, we can build formulas for hand dishwash liquids with increasing active contents to fit various categories on a retailer’s shelf. The categories can include economy, medium grade and premium. Also, the same formulas with little modifications can be used for pots and pan cleaners in I&I applications. The formulas are listed in Table 1 on the following page. All amounts are listed in weight percents.

The most economical way to add sodium alkyl benzene sulfonate is to neutralize the DDBSA while making the batch. Make sure your mixing tank and agitator are constructed of a material that can take pH extremes. The preferred procedure for neutralization of DDBSA is to add the formula amount of water into the mixing tank and start mixing. Add the formula amount of sodium hydroxide 50% solution and then slowly add the DDBSA. Adjust the mixer speed so that it will mix the contents well but at the same time will not generate excessive foaming. Remember, you are handling strong alkali and strong acid, so be careful as these are corrosive material, read MSDS and take appropriate precautions. Also, this neutralization reaction is exothermic. It generates a considerable amount of heat. So also take precautions to accommodate the heat generation, particularly if you are manufacturing a large batch with big amounts of DDBSA and sodium hydroxide. Alternatively, you can buy pre-neutralized material as well. It will probably cost more but may be worthwhile in some instances. Pre-neutralized materials or the sodium salts of DDBSA, also called sodium linear alkyl benzene sulfonate or sodium LAS, are available in 30-, 40-, 50- and 60% active varieties. Some of these materials may contain a hydrotrope (sodium xylene sulfonate) to reduce the viscosity and make the product easier to handle. Others that do not contain a hydrotrope, may come in a paste or gel form. These high viscosity versions need special handling and storage.

The foam height data listed in Table 1 shows that the national brand commercial product has better foam stability than the premium formula made with LAS and alkanolamide. So, the obvious question is, how to increase the foam stability? We tried adding lauramine oxide and cocamidopropyl betaine to the medium formula. First we added 3% active lauramine oxide to the “medium” formula. The initial foam height increased to 130mm but it dropped 120mm after five minutes. When 3% active cocamidopropyl betaine was added to the “medium formula” the initial foam height increased to 135mm and after five minutes it dropped to 130mm. This shows that in LAS-based formulas, the cocamidopropyl betaine may be a better choice as a secondary surfactant than lauramine oxide. Polymers like cellulose ethers (hydroxypropyl methylcellulose, for example) can also be used as foam stabilizers although they may not be as economical as amine oxides and betaines, will take longer to process and will not add to the foam volume in any considerable quantity.

We then tried using sodium lauryl sulfate and sodium laureth-2 sulfate as primary surfactants in dishwash formulas. We chose the medium formula and replaced the LAS with equal amount of active SLS. The initial foam height, as well as the height after five minutes, was the same as those listed for the LAS based formula (initial, 120mm and after 5 min., 105mm).

Next we made a modification to the medium formula by replacing LAS with an equal active amount of SLES (2 mole EO). This formula showed a slight reduction in initial foam height compared to the LAS formula but an improvement in the foam stability (foam height after five minutes). The initial foam height was 115mm and after five minutes it dropped to 110mm.

In light of these experiments and their results, an optimum hand dishwash liquid formula can be developed by using LAS, SLES, and cocamidopropyl betaine and perhaps some cocamide DEA. Let us develop a 15% active formula using these surfactants. A starting formula can be made using 6% active LAS, 4% active SLES, 3% active cocamidopropyl betaine and 2% cocamide DEA. This formula, when diluted 0.1% with deionized water, gave an initial foam height of 135mm and five minutes later the foam went down to 133mm (Ross Miles foam test). In contrast, when lauramine oxide was substituted for cocamidopropyl betaine in the above-mentioned formula, the initial foam height was 120mm and after five minutes it went down to 115mm. That means cocamidopropyl betaine is a better secondary surfactant in an LAS/SLES formula than lauramine oxide.

One or two percent of tetrasodium EDTA or sodium citrate can be added to this formula as a builder; viscosity can be reduced by adding SXS, propylene glycol or denatured ethyl alcohol. A naturally-derived product can be formulated using SLES, cocamide DEA and cocamidopropyl betaine. SLES will give better foam stability than LAS, particularly in hard water. A DEA-free formula can be developed by using LAS, SLES and cocamidopropyl betaine. A sulfate-free and DEA-free formula can be developed using LAS and cocamidopropyl betaine. Both surfactants are listed on the Cleangredients’ database used by EPA’s Design for Environment.

Alkyl diphenyloxide disulsonates (ADPODS), such as Calfax DB-45 from Pilot Chemical Co., is an

Some formulations feature essential oils such as lavender or rosemary for a green way to clean.
excellent additive to improve cold water efficacy and low streaking and spotting properties in hand dishwashing formulas. These powerful anionic surfactants have excellent hydrophilic properties and act as hydrotropes as well as surfactants. ADPODS can also help create ultra concentrated detergents. They reduce the viscosity of high active surfactant solutions and, unlike sodium xylene sulfonate, also add to percent active surfactant in the formula.

To create mild and skin friendly dishwashing liquids, use SLES with three moles of EO like Pilot’s Calfoam ES-303. Cocamidopropyl betaine can be added for improved mildness. Other amphoterics like sodium lauroamphoacetate can also be used for mildness. Aloe vera, vitamin E, panthenol, glycerin and other herbal extracts can be added to the formula for skin care benefits in premium products. Essential oils, such as lavender and rosemary, can be used for aromatherapy benefits. Triclosan is commonly used as an antibacterial agent. To claim antibacterial/antimicrobial efficacy, the product must be registered with appropriate regulatory agencies such as FDA and EPA.

About the Author

Shoab Arif is manager, applications & tech service, at Pilot Chemical Company.
Tel: 513-326-0618; Email: sarif@pilotchemical.com

Related End-User Markets:

Related Raw Materials:

blog comments powered by Disqus
  • Why Look Good, When You Can Look Perfect?

    Why Look Good, When You Can Look Perfect?

    Tom Branna, Editorial Director||April 4, 2016
    A new way to try-before-you buy is capturing the attention of consumers and the beauty industry.

  • From Greenville to Guangzhou

    From Greenville to Guangzhou

    Christine Esposito, Associate Editor||March 14, 2016
    South Carolina start-up BabyBlossom has big plans for its nontoxic baby products line...in China.

  • A Frosch Start in the US

    A Frosch Start in the US

    Christine Esposito, Associate Editor||January 18, 2016
    A trusted eco-savvy German household cleaning brand is now available in America.

  • Who Makes That?

    Who Makes That?

    Tom Branna, Editorial Director||April 1, 2016
    From concept and formulation to testing and filling, today’s contract manufacturers perform a range of services for marketers

  • Inspiring the Next Generation Of Personal Care Products

    Inspiring the Next Generation Of Personal Care Products

    March 1, 2016
    In-Cosmetics 2016 returns to Paris next month, April 12-14, 2016.

  • Testing for Sustainable Preservatives

    Adam P. Byrne, William Michael Hart-Cooper, Kaj Johnson, Larry H. Stanker, Dominic W. S. Wong, William J. Orts||January 4, 2016
    A rapid, inexpensive and qualitative protocol for determining microbial growth inhibition.

  • It’s All About Teamwork

    It’s All About Teamwork

    Melissa Meisel , Associate Editor||January 4, 2016
    Collaboration was the theme of the Consumer Specialty Products Association 2015 annual meeting.

  • Making Sense of Smells

    Making Sense of Smells

    Tom Branna, Editorial Director||January 1, 2016
    Household product perfumery is more complex than ever, with a variety of notes obtained from many different sources.

  • Pod Nation

    Pod Nation

    Christine Esposito, Associate Editor||January 1, 2016
    Laundry detergent sales remain steady, but where consumers are spending money and how they’re cleaning clothes is changing.

  • Silent Partners

    Silent Partners

    Christine Esposito, Associate Editor||December 2, 2015
    I&I suppliers are behind-the-scenes, but critical partners that help keep businesses running and consumers safe.

  • Cleansing Conditioners

    Cleansing Conditioners

    Denise Costrini and Christophe Toumit , Croda Personal Care North America||December 2, 2015
    Relying on consumer data, Croda researchers detail the drivers behind these successful formulas.

  • Just Wild About Harry’s Cosmeticology

    Just Wild About Harry’s Cosmeticology

    Tom Branna, Editorial Director||November 2, 2015
    The ninth edition, edited by Meyer Rosen, has been expanded and improved with an emphasis on the future of the industry.

  • Lush Is Flush with Novel Ideas

    Lush Is Flush with Novel Ideas

    Tom Branna, Editorial Director||November 2, 2015
    New products are the lifeblood of every company. Lush will launch more than 200 of them.

  • What Do You Mean by Clean?

    What Do You Mean by Clean?

    Tom Branna, Editorial Director||November 2, 2015
    Household cleaning has undergone many changes over the years and more are on the way, as suppliers develop novel ingredients.

  • Contract Manufacturing/Private Label Directory

    Contract Manufacturing/Private Label Directory

    October 1, 2015
    Our directory is your source to find a manufacturer to get your product to market.

  • Market Your Cosmetics In Europe with Safety

    Market Your Cosmetics In Europe with Safety

    Pascal Yvon, IDEA TESTS Group||October 1, 2015
    Compliance to European safety regulations for cosmetic products, final formulations and ingredients.

  • Talking Point

    Talking Point

    Christine Esposito, Associate Editor||October 1, 2015
    For its inaugural Sustainability Dialog in Frankfurt, Clariant gathered stakeholders that included a mix of customers, third

  • A Consumer Revolution

    A Consumer Revolution

    Melissa Meisel, Associate Editor||June 1, 2015
    IRI’s 2015 Summit celebrates the progression of information.

  • A Nod To The Nose

    A Nod To The Nose

    Christine Esposito, Associate Editor||January 6, 2015
    The right scent enhances the experience and adds some excitement in the workhorse household products sector.

  • A Dose of Reality?

    A Dose of Reality?

    Tom Branna, Editorial Director||January 6, 2015
    Unit dose formats have provided a shot in the arm for the laundry detergent industry, but issues remain.

  • The Next 100 Years

    The Next 100 Years

    Tom Branna, Editorial Director||January 6, 2015
    Its Centennial Celebration over, the Consumer Specialty Products Association charts a path for growth for another century. One thing is constant, however, CSPA will remain a trusted business partner for members, regulators, legislators, retailers and NGOs.

  • Never Ending Journey

    Never Ending Journey

    Melissa Meisel and Christine Esposito , Associate Editors||November 3, 2014
    Sustainability is the present and future of household and personal care packaging.

  • How Now, Kao?

    How Now, Kao?

    Tom Branna, Editorial Director||November 3, 2014
    The multinational consumer product giant is bringing its extensive product line to consumers around the world.

  • Find Your Niche

    Find Your Niche

    Tom Branna, Editorial Director||November 3, 2014
    Yes, the US household cleaning category is dominated by multinationals, but there’s still room for smaller, agile companies.

  • Trade Association Directory 2014

    February 7, 2014
    Following are the contact details of trade associations that serve various segments of our industry and are mentioned frequently in the pages of Happi. Associations that are not listed but wish to be included should contact Tom Branna, Happi/Rodman Media, Ramsey, NJ Tel: (201) 880-2223; Fax: (201) 825-0553; Email: tbranna@rodmanmedia.com.

  • As the World Turns…

    As the World Turns…

    Tom Branna, Editorial Director||September 4, 2013
    Surfactant suppliers must be agile to meet the needs of their customers whenever and wherever consumer demand takes them.

  • Expanding to India

    Expanding to India

    Gunjan Bagla, Amritt, Inc.||August 2, 2013
    Advice for international CPG companies on how to avoid pitfalls while taking advantage of opportunities in this fast-growing country.

  • Surfactants Provide Solutions

    Surfactants Provide Solutions

    Tom Branna, Editorial Director||August 2, 2013
    The global surfactant industry meets in Barcelona as the World Surfactant Congress attracts more than 1000 attendees from around the world.