
Mr Muscle is a brand of household cleaning products manufactured by S. C. Johnson & Son. The original product was an aerosol oven cleaner developed in 1986. The product lineup has since expanded and now includes bathroom and toilet cleaners, glass and surface cleaners, floor cleaners, kitchen cleaners, and degreasers. Mr Muscle products have been linked to several deep dermal and full-thickness skin burns. They contain toxic ingredients such as sodium hydroxide, isobutane, and ammonium chlorides. Household ammonia has a strong odour, so Mr Muscle uses ammonium hydroxide in combination with other ingredients to achieve the same cleaning results with less ammonia.
| Characteristics | Values |
|---|---|
| Ammonia | Mr Muscle products contain ammonium hydroxide, which has a strong odour similar to ammonia. |
| Toxicity | Mr Muscle products are toxic and contain ingredients such as sodium hydroxide, isobutane, and ammonium chlorides. |
| Health Hazards | Mr Muscle is rated as a 3 (serious) for health hazards by the US Department of Health and Human Services. |
| Flammability | It is rated as a 4 (severe) for flammability by the same department. |
| Neurological Symptoms | Potential side effects include headaches, dizziness, nausea, breathing difficulties, skin irritation, paralysis, and even death. |
| Allergens | Mr Muscle products contain known allergens that can trigger hay-fever-like symptoms. |
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What You'll Learn

Mr Muscle products are toxic and contain allergens
The United States Department of Health and Human Services (HHS) rates Mr Muscle as a scale 3 (serious) for health and a 4 (severe) for flammability. The brand includes hard-surface cleaners, bathroom and toilet cleaners, glass and surface cleaners, floor cleaners, kitchen cleaners, and degreasers. Mr Muscle products are also tested on animals, with chemicals dripped into the eyes, forced down the throats, or rubbed into the skin of rabbits, guinea pigs, mice, rats, and fish. These tests can cause symptoms such as blindness, skin lesions, vomiting, organ failure, and death.
The original Mr Muscle product was an aerosol oven cleaner developed in 1986. It contained a strong base, such as caustic soda, which attacked grease by saponification, and surfactants, which targeted both grease and food spills. An abrasive may have been included to help scour the oven. The product worked better on hot ovens, but the fumes made it unpleasant to use in enclosed spaces. The propellant in the aerosol is a blend of propane and isobutane.
Mr Muscle products contain chemicals that can be harmful to wildlife and the environment when released into ecosystems via wastewater systems. Some of the ingredients in Mr Muscle products, such as ammonium hydroxide, are combined with other ingredients to reduce the amount of ammonia used due to its strong odor. However, even with reduced amounts, ammonia is still present in Mr Muscle products and can contribute to their toxic nature. Overall, the presence of toxic ingredients, allergens, and harmful chemicals in Mr Muscle products raises concerns about their safety for both human use and the environment.
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The brand includes other hard-surface cleaners
Mr Muscle is a British brand of hard-surface cleaners, manufactured by S. C. Johnson & Son. The brand's original product was an aerosol oven cleaner, developed in 1986. Since then, the Mr Muscle product line has expanded to include a range of other hard-surface cleaners.
The brand's products include bathroom and toilet cleaners, glass and surface cleaners, floor cleaners, and kitchen cleaners and degreasers. Mr Muscle products are known for their effectiveness in removing grease and grime from surfaces. For example, the Mr Muscle Glass & Surface cleaner uses ammonium hydroxide in combination with other ingredients to achieve effective cleaning results while reducing the amount of ammonia used.
The brand also offers drain unblockers, oven cleaners, and stain remover sprays. The Mr Muscle Sink & Drain Gel, for instance, contains a powerful and corrosive alkali that removes congealed fats by severing the chemical bonds between glycerol and fatty-acid chains. This process produces water-soluble components that can be easily flushed away.
In addition to its range of cleaning products, Mr Muscle has similar product lines in other parts of the world, such as the United States, where it sells under the Duck and Scrubbing Bubbles brands. The brand has faced some controversies, including complaints about the potency of its cleaning agents and reports of skin burns associated with its oven cleaner.
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Mr Muscle products are tested on animals
Mr Muscle is a popular brand of household cleaning products, including kitchen cleaners, bathroom cleaners, oven cleaners, glass cleaners, and drain unblockers. The brand is owned by SC Johnson, a company that also owns cruelty-free brands like Method, Ecover, and Babyganics. However, Mr Muscle products are tested on animals.
According to SC Johnson, animal testing is required for new products. The company continues to introduce new products to the market and tests the ingredients on animals such as rabbits, guinea pigs, mice, rats, and fish. These animals are subjected to cruel experiments where chemicals are dripped into their eyes, forced down their throats, or rubbed into their skin. As a result, they may suffer from symptoms such as blindness, skin lesions, vomiting, organ failure, and even death.
In 2015, the UK government banned animal testing of household products. However, this ban only applies to finished products, and the ingredients that make up these products can still be legally tested on animals. This loophole allows companies like SC Johnson to continue introducing new products and testing their ingredients on animals.
The presence of toxic chemicals in Mr Muscle products, such as sodium hydroxide, isobutane, and ammonium chlorides, further underscores the need for alternatives to animal testing. These chemicals can cause severe neurological symptoms in humans, including headaches, dizziness, nausea, breathing difficulties, skin irritation, paralysis, and even death. Additionally, these chemicals can have detrimental effects on wildlife and the environment when released into ecosystems through wastewater systems.
While Mr Muscle may argue that their products are tested on animals when required by law, it is important to note that truly cruelty-free brands refuse to sell their products under such conditions. They prioritize their commitment to animal welfare over market expansion. Therefore, consumers who wish to support animal welfare can choose from a growing number of cruelty-free household cleaning products available in the market.
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Mr Muscle is rated as a scale 3 for Health and a 4 for Flammability
Mr Muscle is a British brand of hard-surface cleaning products, including bathroom cleaners, drain unblockers, toilet cleaners, kitchen sprays, oven cleaners, glass cleaners, floor wipes, and stain remover sprays. The original product was an aerosol oven cleaner developed in 1986.
The brand has been the subject of controversy due to the potency of its cleaning agents, which were thought to be unnecessarily high and potentially harmful to health. This controversy was sparked by a 1994 study in the United Kingdom, which found a causal link between Mr Muscle oven cleaner and a series of deep dermal and full-thickness skin burns admitted to the Welsh Regional Burns and Plastics Unit between January 1990 and July 1992.
Mr Muscle products are known to contain toxic ingredients such as sodium hydroxide, isobutane, and ammonium chlorides, which can cause various health issues, including neurological symptoms like headaches, dizziness, nausea, breathing difficulties, skin irritation, paralysis, and even death. The presence of ammonium chlorides in Mr Muscle products is notable, as ammonia is a known irritant with a strong odour. While the brand has not disclosed the exact amount of ammonia in its products, they have indicated that they use ammonium hydroxide in combination with other ingredients to reduce the amount of ammonia needed while still achieving effective cleaning results.
Given the presence of toxic chemicals and known allergens in Mr Muscle products, it is not surprising that they are rated as a scale 3 for Health and a 4 for Flammability. The health rating of 3 likely indicates that the products contain hazardous substances that can cause acute or chronic health issues with prolonged or repeated exposure. The flammability rating of 4 suggests that the products are highly flammable and could easily ignite under certain conditions. These ratings serve as a warning to users to exercise caution when using Mr Muscle products and to follow the necessary safety precautions, such as proper ventilation and avoiding contact with skin and eyes.
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Mr Muscle uses ammonium hydroxide to reduce ammonia content
Mr Muscle is a brand of household cleaning products manufactured by S. C. Johnson & Son. The original product was an aerosol oven cleaner, but the product lineup has since expanded to include bathroom and toilet cleaning, glass and surface cleaners, floor cleaners, kitchen cleaners and degreasers, and more. Mr Muscle products are known for their strong chemical formulae, which have been linked to deep dermal and full-thickness skin burns.
Mr Muscle products contain toxic ingredients such as sodium hydroxide, isobutane, and ammonium chlorides. They are also known to contain allergens that can produce hay-fever-like symptoms. The brand has also received criticism for its animal testing policies.
One of the challenges in developing effective cleaning products is achieving the right pH level. The pH of a formula can affect its performance, as well as how long it lasts within a container. Household ammonia is an effective cleaning agent, but it has a strong odour. To address this issue, Mr Muscle uses ammonium hydroxide in combination with other ingredients. This allows them to achieve the same cleaning results while using much less ammonia.
By using ammonium hydroxide, Mr Muscle can reduce the amount of ammonia in their products while maintaining their cleaning effectiveness. Ammonium hydroxide has similar properties to ammonia, allowing it to effectively remove grease and soils. This approach helps to minimise the strong odour associated with ammonia and improve the overall user experience.
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Frequently asked questions
Yes, Mr Muscle does contain ammonia. However, to reduce its strong odour, the manufacturer combines ammonium hydroxide with other ingredients to achieve the same cleaning results with less ammonia.
Ammonia is a powerful and corrosive alkali that removes congealed fats. It severs the chemical bonds between glycerol molecules and fatty-acid chains, producing water-soluble components that can be flushed away.
Yes, the manufacturer has found that monoethanolamine, a less volatile chemical with similar properties to ammonia, can be used as an alternative. However, monoethanolamine is a weak base and requires the addition of caustic soda, surfactants, and bentonite as a mild abrasive.











































