Petroleum jelly, petrolatum, white petrolatum, soft paraffin/paraffin wax or multi-hydrocarbon, CAS number 8009-03-8, is a semi-solid mixture of hydrocarbons (with carbon numbers mainly higher than 25), originally promoted as a topical ointment for its healing properties.
After petroleum jelly became a medicine chest staple, consumers began to use it for many ailments, as well as cosmetic purposes, including toenail fungus, genital rashes (non-STD), nosebleeds, diaper rash, and chest colds. Its folkloric medicinal value as a "cure-all" has since been limited by better scientific understanding of appropriate and inappropriate uses. It is recognized by the U.S. Food and Drug Administration (FDA) as an approved over-the-counter (OTC) skin protectant and remains widely used in cosmetic skin care.
- 1 History
- 2 Physical properties
- 3 Uses
- 3.1 Medical treatment
- 3.2 Skin and hair care
- 3.3 Product care and protection
- 3.4 Production processes
- 3.5 Other
- 3.6 Clean-up
- 4 References
- 5 External links
The raw material for petroleum jelly was discovered in 1859 in Titusville, Pennsylvania, United States, on some of the country's first oil rigs. Workers disliked the paraffin-like material forming on rigs because it caused them to malfunction, but they used it on cuts and burns because they believed that it hastened healing.
Robert Chesebrough, a young chemist whose previous work of distilling fuel from the oil of sperm whales had been rendered obsolete by petroleum, went to Titusville to see what new materials had commercial potential. Chesebrough took the unrefined black "rod wax", as the drillers called it, back to his laboratory to refine it and explore potential uses. Chesebrough discovered that by distilling the lighter, thinner oil products from the rod wax, he could create a light-colored gel. Chesebrough patented the process of making petroleum jelly by U.S. Patent 127,568 in 1872. The process involved vacuum distillation of the crude material followed by filtration of the still residue through bone char.
Chesebrough traveled around New York demonstrating the product to encourage sales by burning his skin with acid or an open flame, then spreading the ointment on his injuries and showing his past injuries healed, he claimed, by his miracle product.
Petroleum jelly is a mixture of hydrocarbons, having a melting point usually close to human body temperature, approximately 37 °C (99 °F). It is flammable only when heated to liquid; then the fumes will light, not the liquid itself, so a wick material like leaves, bark, or small twigs is needed to ignite petroleum jelly. It is colorless or has a pale yellow color (when not highly distilled), translucent, and devoid of taste and smell when pure. It does not oxidize on exposure to the air and is not readily acted on by chemical reagents. It is insoluble in water. It is soluble in dichloromethane, chloroform, benzene, diethyl ether, carbon disulfide and oil of turpentine.
Depending on the specific application of petroleum jelly, it may be USP, B.P., or Ph. Eur. grade. This pertains to the processing and handling of the petroleum jelly so it is suitable for medicinal and personal-care applications.
Comparison with glycerol
Because they feel similar when applied to human skin, there is a common misconception that petroleum jelly and glycerol (glycerine) are physically similar. Petroleum jelly is a non-polar hydrophobic (water-repelling) hydrocarbon and insoluble in water. Glycerol is an alcohol that is strongly hydrophilic (water-attracting): by continuously absorbing moisture from the air (humectant), it produces the feeling of wetness on the skin. This feeling of wetness is similar to the feeling of greasiness produced by petroleum jelly.
Most uses of petroleum jelly exploit its lubricating and coating properties.
Vaseline brand First Aid Petroleum Jelly, or carbolated petroleum jelly containing phenol to give the jelly additional antibacterial effect, has been discontinued. During World War II, a variety of petroleum jelly called red veterinary petrolatum, or Red Vet Pet for short, was often included in life raft survival kits. Acting as a sunscreen, it provides protection against ultraviolet rays.
The American Academy of Dermatology recommends keeping skin injuries moist with petroleum jelly to reduce scarring. A verified medicinal use is to protect and prevent moisture loss of the skin of a patient in the initial post-operative period following laser skin resurfacing.
There is one case report published in 1994 indicating petroleum jelly should not be applied to the inside of the nose due to the risk of lipid pneumonia, but this was only ever reported in one patient. However, petroleum jelly is used extensively by otolaryngologists—ear, nose, and throat surgeons—for nasal moisture and epistaxis treatment, and to combat nasal crusting. Large studies have assessed petroleum jelly applied to the nose for short durations to have no significant side effects.
Skin and hair care
Most petroleum jelly today is used as an ingredient in skin lotions and cosmetics, providing various types of skin care and protection by minimizing friction or reducing moisture loss, or by functioning as a grooming aid.
Preventing moisture loss
By reducing moisture loss, petroleum jelly can prevent chapped hands and lips, and soften nail cuticles.
This property is exploited to provide heat insulation: petroleum jelly can be used to keep swimmers warm in water when training or during channel crossings or long ocean swims. It can prevent chilling of the face due to evaporation of skin moisture during cold weather outdoor sports.
In the first part of the twentieth century, petroleum jelly, either pure or as an ingredient, was also popular as a hair pomade. When used in a 50/50 mixture with pure beeswax, it makes an effective moustache wax.
Petroleum jelly can be used to reduce the friction between skin and clothing during various sport activities, for example to prevent chafing of the seat region of cyclists, the nipples of long distance runners wearing loose T-shirts, and is commonly used in the crotch area of wrestlers and footballers.
Petroleum jelly is commonly used as a personal lubricant because it does not dry out like water-based lubricants, and has a distinctive "feel", different from that of K-Y and related methylcellulose products. However, it is not recommended for use with condoms during sexual activity because it swells latex and thus increases the chance of rupture. It is also not recommended for vaginal intercourse because it may increase the risk of yeast infection and bacterial vaginosis in women. It may be used safely for unprotected anal intercourse.
Product care and protection
Petroleum jelly can be used to coat corrosion-prone items such as metallic trinkets, non-stainless steel blades, and gun barrels prior to storage as it serves as an excellent and inexpensive water repellent. It is used as an environmentally friendly underwater antifouling coating for motor boats and sailing yachts. It was recommended in the Porsche owner’s manual as a preservative for light alloy (alleny) anodized Fuchs wheels to protect them against corrosion from road salts and brake dust. “Every three months (after regular cleaning) the wheels should be coated with petroleum jelly.”
It can be used to finish and protect wood, much like a mineral oil finish. It is used to condition and protect smooth leather products like bicycle saddles, boots, motorcycle clothing, and used to put a shine on patent leather shoes (when applied in a thin coat and then gently buffed off).
Petroleum jelly can be used to lubricate zippers and slide rules. It was also recommended by Porsche in maintenance training documentation for lubrication (after cleaning) of "Weatherstrips on Doors, Hood, Tailgate, Sun Roof". The publication states "…before applying a new coat of lubricant…" "Only acid-free lubricants may be used, for example: glycerine, Vaseline, tire mounting paste, etc. These lubricants should be rubbed in, and excessive lubricant wiped off with a soft cloth." It is used in bullet lubricant compounds.
Petroleum jelly is a useful material when incorporated into candle wax formulas. The petroleum jelly softens the overall blend, allows the candle to incorporate additional fragrance oil, and facilitates adhesion to the sidewall of the glass. Petroleum jelly is used to moisten nondrying modelling clay such as plasticine, as part of a mix of hydrocarbons including those with greater (paraffin wax) and lesser (mineral oil) molecular weights. It is used as a tack reducer additive to printing inks to reduce paper lint "picking" from uncalendered paper stocks. It can be used as a release agent for plaster molds and castings. It is used in the leather industry as a waterproofing cream. It can be used for tinder, lightly coated on a cotton ball. It has been used as a secondary ingredient in a Molotov cocktail, to make the flames stick to any surface they touch and to make large amounts of smoke. It is used as a multifunctional product.
Petroleum jelly is used by tattoo artists to lubricate the area being tattooed. The petroleum jelly facilitates the wiping away of pigment that remains on the surface of the skin. It also provides a barrier to stop bacteria from entering and infecting the newly opened skin surface.
Petroleum jelly is mixed with a high proportion of strong inorganic chlorates due to it acting as a plasticizer and a fuel source. An example of this is Cheddite C which consists of a ratio of 9:1, KClO3 to petroleum jelly. This mixture is unable to detonate without the use of a blasting cap.
It was used as a stabiliser in the manufacture of the propellant Cordite.
Mechanical, barrier functions
Petroleum jelly can be used to coat the inner walls of terrariums to prevent animals crawling out and escaping.
A stripe of petroleum jelly can be used to prevent the spread of a liquid. For example, it can be applied close to the hairline when using a home hair dye kit to prevent the hair dye from irritating or staining the skin. It is also used to prevent diaper rash.
Petroleum jelly is used to gently clean a variety of surfaces, ranging from makeup removal from faces to tar stain removal from leather.
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Petroleum jelly is used to moisturize the paws of dogs, and to inhibit fungal growth on aquatic turtles’ shells. It is a common ingredient in hairball remedies for domestic cats.
Petroleum jelly is very sticky and hard to remove from non-biological surfaces with the usual and customary cleaning agents typically found in the home. It may be dissolved with paint thinner or other petroleum solvents such as acetone, which dissolves many plastics.
Petroleum jelly is slightly soluble in alcohol. To avoid damage to plastics and minimize ventilation issues, isopropyl (rubbing) alcohol can be used to remove petroleum jelly from most surfaces. Isopropyl alcohol is inert to most household surfaces, including almost every plastic, and removes petroleum jelly efficiently. While alcohol causes fewer ventilation problems than petroleum solvents, ventilation is still recommended, especially if large surface areas are involved.
Petroleum jelly is also soluble in lower-molecular-weight oils. Using an oil to dissolve the petroleum jelly first can render it more soluble to solvents and soaps that would not dissolve pure petroleum jelly. Vegetable oils such as canola and olive oil are commonly used to aid in the removal of petroleum jelly from hair and skin.
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has a melting point just above body temperature
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Solubility--Insoluble in water; almost insoluble in cold or hot alcohol or in cold dehydrated alcohol; freely soluble in benzene, carbon disulfide, chloroform, or turpentine oil; soluble in ether, solvent hexane, or in most fixed and volatile oils, the degree of solubility in these solvents varying with the composition of the petrolatum.
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- This article incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). "Vaseline". Encyclopædia Britannica (11th ed.). Cambridge University Press.
|Wikisource has the text of the 1905 New International Encyclopedia article Petrolatum.|