Frequently Asked Questions

Q:Why have the ingredients changed on the bar soap?
A:Kirks Original Coco Castile Soap is a heritage product dating back to the 1800’s. We recognize that over the years our consumers have more desire to understand what is in their products. In 2015, Kirk’s Natural made the decision to offer full disclosure of ingredients in our Kirk’s Coco Castile Soaps. In an effort to be transparent, we want to bring this to your attention. The new wrappers that you will begin to see on your store shelves will have a simple and straightforward label. Please be assured that there have been NO changes made to your beloved soap! We’re happy to tell you what’s in ours! For example, “Coconut Soap” being an ingredient wasn’t very clear. Sodium Chloride when combined with coconut oil causes a chemical reaction that changes the product over to Sodium Cocoate. This process is known as saponification. Close
Q:What does Castile mean?
A:Today, Castile refers to soaps made without animal fats. Close
Q:What is coconut soap?
A:Coconut Soap is made by a centuries-old, time honored process mixing coconut oil with lye (sodium hydroxide). This begins what is called the saponification process. During the saponification process the coconut oil and lye (sodium hydroxide) are converted into coconut soap. All traces of residual lye (sodium hydroxide) are fully neutralized in our exclusive soap-making process. Close
Q:Does Kirk's soap or liquid products contain Phthalates?
A:Kirk’s Original Coco Castile bar soap, Fragrance Free bar soap and all liquid products are Phthalate-Free. Close
Q:Do Kirk's Natural products contain sodium lauryl sulfate?
A:Kirk’s Natural products contain no sodium lauryl sulfate. Close
Q:What is Kirk's pH?
A:9.6 in 1% solution water. Close
Q:If there are synthetic ingredients, why do the liquid product labels say natural?
A:The synthetic materials (preservatives and a portion of fragrance) are present in trace amounts. Kirk’s Liquid Products are 99%+ natural. Close
Q:Can Kirk's Products be used to wash delicates?
A:Absolutely! Kirk’s Castile soap and liquid soaps can be used for washing clothes, delicates and more. Kirk’s recommends hand washing delicates in the sink. Close
Q:Can Kirk's Liquid Soap be used as a dishwashing liquid?
A:Many customers do use Kirk’s Liquid Soap as a dishwashing liquid. There are no harmful ingredients in it and it does leave your dishes sparkling clean while being extremely mild on your hands. It can also be used for hand-washables. Close
Q:What kind of fragrance do you use in your soap?
A:The fragrance is less than 1% of the total ingredients in Kirk’s products. The fragrance is a combination of essential oils from the pine and citrus family and is Phthalate-Free. For those with highly sensitive skin we recommend our Kirk’s Original Coco Castile Fragrance Free Bar. Close
Q:What are the health effects of Kirk's soap?
A:Eye: The product is mild enough that no damage or irritation should occur. In the event that irritation does occur, warm water poured over the bridge of the nose for a couple of minutes should be enough. If symptoms persist, a doctor should be consulted. Ingestion: The product is not poisonous. If a large quantity is ingested, it may cause vomiting. Skin: The product contains no known irritants or allergens. An adverse reaction, while unusual, is most likely due to individual allergies. If adverse reaction occurs, please discontinue use of product immediately. Close
Q:Where can I purchase bars of Kirk's Natural soap?
A:Use our online Retailer map located at to find a retailer in your state. Close
Q:If the fragrance is synthetic, why does the bar soap label say natural?
A:Because 99% plus ingredients are natural and fragrance is mostly derived from natural materials. Close
Q:Where do I send Press & Media Questions?
A:We are happy to speak with members of the media regarding our Kirk’s Natural products! For further information, such as product requests, high-resolution images and more, please contact Close
Q:Does Kirk's Natural offer coupons?
A:Unfortunately, since we are a small company we are unable to offer coupons. However, if you Like Kirk’s Natural on Facebook, we are constantly doing product giveaways, specials and more! Close
Q:Do Kirk's Natural products contain soy?
A:There is no soy in any of our products. Close
Q:Are Kirk's Natural products Vegan?
A:All Kirk’s Natural products are Vegan. Close
Q:Is Kirk's biodegradable?
A:Kirk’s is completely biodegradable. All surfactants used in Kirk’s are biodegradable. This means all surfactants (sudsing/cleaning agents) are broken down into simpler compounds by natural biological action helping to eliminate sudsing/foaming problems in lakes and streams. Close
Q:Is Kirk's kosher?
A:Although Kirk’s doesn’t carry the “circle U” symbol for kosher products, it is animal free. There has not been sufficient consumer interest to warrant seeking Kosher certification, which entitles the traditional rabbinical code of manufacturing (regular inspection by a rabbi, etc.) Close
Q:Does Kirk's use any lye in Castile soap?
A:Yes, lye (sodium hydroxide)is used to convert coconut oil into soap. Kirk’s soap contains no free lye or lye residues in it. All traces of residual lye are fully neutralized in our soap-making process. Close
Q:Are Kirk's Natural products Gluten-Free & Corn Free?
A:All Kirk’s Natural products are Gluten-Free and Corn Free. Close
Q:What is the shelf life of Kirk's bar soap?
A:Kirk’s bar has an unlimited shelf life. The bar is still usable even if it has discolored after a very long storage period. Close
Q:What is the shelf life of Kirk's Liquid Products?
A:The liquid products have a shelf life of 5 years. Close
Q:How do we get added to your Find A Retailer map?
A:Send an email to Please list the states your stores are located and we will be sure to add it our list. Close
Q:What is the source of the vegetable glycerin in Kirk's Products?
A:Coconut Oil Close
Q:What are the ingredients in Kirk's bar soap?
A:Sodium Cocoate, Water, Glycerin, Sodium Chloride, Sodium Gluconate, Fragrance Close
Q:Is Kirk's Castile Soap antibacterial?
A:No, Kirk’s Castile soap is not antibacterial. However, coconut oil has anti-bacterial and anti-fungal properties. Close
Q:What is the purpose of Glycerin in the Kirk's soap?
A:Vegetable glycerin is a natural product made from vegetable oil, often coconut or palm oil. Glycerin is classified as a humectant, meaning it attracts moisture to the skin, and is thought to leave the skin moist and healthy. It has very emollient properties and can help soften and smooth the skin. Close
Q:What happened to your Premium Transparent Glycerin bars?
A:Unfortunately, the glycerin bars were discontinued in 2012. If you search online, many bars are still available. Close
Q:I have a septic system and am concerned whether my homemade laundry detergent will be safe for my septic?
A:Kirk’s Natural is your perfect solution! Critics state that many products are toxic to soil organisms when discharged from your septic system and aquatic environments when sewage treatment plants discharge into a river. Kirk’s Natural prides itself on being completely biodegradable. All surfactants used in Kirk’s are biodegradable. This means all surfactants (sudsing/cleaning agents) are broken down into simpler compounds by natural biological action helping to eliminate foaming problems in lakes and streams. Close
Q:Why do I experience stinging in my private areas when using Kirk's soap?
A:Other people have this same issue. You might be surprised to learn that skin does not have a neutral pH. In fact, pH can vary based on the part of the body, and even from person to person. Our Kirk’s Original Coco Castile Bar soap has a pH of 9.6. For some people, this may cause some irritancy in the private areas. If you experience discomfort, we recommend using a product with a very mild pH or a product that is specific to that area of the body. Close