Katrina Rosales
Incense is a smoke-emitting substance that has been used for thousands of years for spiritual purposes, to freshen the scent of indoor areas, and for health reasons. It is made from a variety of ingredients, including wood, resins, and powders, and contains fragrant materials and a combustible base. The combustible base allows the incense to burn with a self-sustained ember and releases a pleasant smell. However, the smoke released from burning incense also contains particulate matter, gases, and organic compounds that can be inhaled and may have negative health effects. While solid incense is not considered poisonous, liquid incense can be harmful if swallowed or inhaled, and it is important to seek medical help immediately if this occurs. In terms of solubility, water-soluble binders are used in incense mixtures to prevent crumbling, and small quantities of water are added to the incense base mixture to form a dough. Additionally, incense blanks are sometimes dipped in water or a water/glue mixture before being coated with incense powder. However, camphor, a substance sometimes used in incense, is not soluble in water.
| Characteristics | Values |
|---|---|
| Does incense dissolve in water? | No, incense does not dissolve in water. |
| Source | Camphor, a common incense ingredient, is not soluble in water. |
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What You'll Learn
Incense mixtures contain water
The amount of water added to the incense mixture is important. If too much water is added, the mixture will have an uneven distribution of air and an undesirable density, causing the incense to burn unevenly, too slowly, or too quickly. Water-soluble binders such as "makko" are also added to the mixture to ensure that the incense does not crumble when dry and to dilute the mixture.
The combustible base of a direct-burning incense mixture binds the fragrant material together and allows the incense to burn with a self-sustained ember. The base is chosen to have no perceptible smell. Commercially, the two predominant types of incense base are fuel and oxidizer mixtures and natural plant-based binders. Charcoal or wood powder provides fuel for combustion, while an oxidizer like sodium or potassium nitrate sustains burning. Fragrant materials are added to the base, along with essential oils.
In addition to its use in solid incense, water is also used in the production of cored incense in the form of thin bamboo or sandalwood slivers soaked in water or a thin water/glue mixture. This process is known as powder-coating and is used to produce larger coil or cored stick incense. The soaked sticks are then dipped into a tray of incense powder and rolled in the powder to create a thick layer of incense material.
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Camphor, an incense ingredient, is not water-soluble
Water solubility is a property of certain compounds that can be dissolved in water. Incense is a mixture of combustible bases, fragrant materials, and essential oils. While some incense ingredients are water-soluble, such as the natural binder "makko", camphor, an ingredient in incense, is not water-soluble.
Camphor is a waxy, colorless solid with a strong aroma. It is classified as a terpenoid and a cyclic ketone. Camphor has been used for centuries in traditional Chinese medicine and as a folk medicine. It is often found in the wood of the camphor laurel tree (Cinnamomum camphora), a large evergreen tree native to East Asia, and in the kapur tree (Dryobalanops sp.), a tall timber tree from Southeast Asia. Camphor can also be derived from other natural sources, such as rosemary leaves, camphorweed, and camphor basil.
The word "camphor" has an interesting etymology, deriving from the Old French "camphre" and Medieval Latin "camfora." Its earliest roots can be traced back to the Austronesian Malay word "kapur," meaning "lime" or "chalk." Camphor was historically extracted from the Borneo camphor trees (Dryobalanops aromatica) in the ancient port of Barus, located near modern-day Sibolga on the western coast of Sumatra.
Camphor is not water-soluble due to its chemical structure as a cyclic ketone. Ketones are organic compounds that contain a carbonyl group (C=O) bonded to two hydrocarbon groups. While some ketones may have limited solubility in water, camphor's specific structure likely makes it insoluble in water. This insolubility is important in the context of incense, as it means that camphor will not dissolve and separate from the other incense ingredients when exposed to water.
In incense, camphor likely serves as a fragrant material, contributing to the overall aroma of the incense mixture. Its insolubility in water is advantageous as it ensures that the camphor remains evenly distributed throughout the incense, helping to maintain consistent fragrance production during burning.
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Incense smoke contains harmful gases
Incense smoke contains a variety of harmful gases and organic compounds. The gaseous phase consists of carbon dioxide (CO2), carbon monoxide (CO), sulfur dioxide (SO2), formaldehyde, nitrogen dioxide (NO2), polycyclic aromatic compounds, and volatile organic compounds (VOCs). The burning of incense also produces benzene, toluene, and xylenes, as well as aldehydes and polycyclic aromatic hydrocarbons (PAHs). These gases and compounds are released into the air and can be inhaled, potentially causing respiratory system dysfunction and other negative health effects.
Carbon monoxide (CO), a colourless, odourless, and poisonous gas, is formed during the incomplete combustion of organic substances such as hydrocarbons, wood, incense, and fossil fuels. It has a much higher affinity for haemoglobin than oxygen, reducing the blood's ability to transport oxygen. Exposure to carbon monoxide can cause headaches, dizziness, weakness, and nausea at low concentrations, while high concentrations can be fatal.
Sulfur dioxide (SO2) and nitrogen dioxide (NO2) are also present in incense smoke. Exposure to these gases can have adverse effects on health, including reduced work capacity, aggravation of cardiovascular diseases, respiratory illnesses, lung irritation, and alterations in the lung's defence system.
Volatile organic compounds (VOCs) are chemicals that have low boiling points and easily evaporate at room temperature. Common VOCs found in incense smoke include benzene, toluene, and xylenes. Exposure to VOCs can irritate the eyes and respiratory system, and may have other toxic effects on the body.
In addition to the gaseous components, incense smoke also contains particulate matter (PM) that can be inhaled. These particles are small, inhalable, and may contain carcinogenic substances. Studies have associated incense smoke with an increased risk of cancer, asthma, and heart disease. However, it is challenging to isolate the health effects of specific components in incense smoke due to the complex mixture of gases and particles.
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Burning incense may cause respiratory issues
Burning incense is a popular practice worldwide, with a long history of use in spiritual and hygienic practices. However, recent research has revealed potential health drawbacks, particularly concerning respiratory issues.
Incense smoke contains a mixture of suspended particulates and harmful gases, which can be easily inhaled and cause respiratory system dysfunction. These particulates include volatile organic compounds (VOCs) such as benzene, toluene, and xylenes, as well as aldehydes and polycyclic aromatic hydrocarbons (PAHs). The combustion of incense also produces carbon monoxide (CO), a poisonous gas that can cause headaches, dizziness, weakness, and nausea in low concentrations, and can be fatal in high concentrations.
The inhalation of incense smoke pollutants has been linked to respiratory problems, including allergic contact dermatitis, chronic cough, and asthma. Studies have found that incense smoke can trigger chronic inflammation in the body, which may affect heart tissues and contribute to overall inflammation. Additionally, incense smoke has been associated with an increased risk of heart disease and cancer, particularly upper respiratory tract carcinomas and lung carcinomas.
The impact of incense burning has been observed to affect multiple vital organs, including the eyes, nose, throat, and skin. Prolonged exposure to incense smoke may result in higher concentrations of NOx, which can penetrate deeper into the lower airways, causing delayed-onset respiratory issues. This is particularly concerning for individuals who work in temples or religious places where incense burning is a common practice, as they are exposed to high levels of air pollutants.
While the use of incense has been a traditional practice for centuries, it is important to be aware of the potential health risks associated with burning incense, particularly the risk of respiratory issues and other negative health outcomes.
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Incense has been used in religious ceremonies
Incense, an aromatic biotic material that releases fragrant smoke when burnt, has been used in religious ceremonies and rituals for centuries. The use of incense in religious contexts is rooted in the traditions of Judaism and dates back to the time of the Second Jewish Temple. The smoke from burning incense is often interpreted as a symbol of prayer and purification in many religious traditions.
In East Asian Buddhist ceremonies and Chinese Taoist and Japanese Shinto rites, incense holds a significant role. Worshippers in these traditions light and burn sticks of incense, which they wave or raise above their heads while bowing to statues or plaques of deities or ancestors. The thick coils of incense are either hung from the ceiling or placed on special stands. The formula and scent of the incense sticks used in various temples throughout Asia vary, with some incense sticks lacking a supporting core and needing to be placed horizontally into censers filled with ash.
The use of incense in Christianity is inspired by passages in the Bible, and its symbolism is seen in Psalm 141 (140), verse 2: "Let my prayer be directed as incense in thy sight: the lifting up of my hands, as the evening sacrifice." Incense is employed in worship by various Christian denominations, including Roman Catholic, Eastern Catholic, Orthodox, Lutheran, Old Catholic, Liberal Catholic, and some Anglican Churches. Incense is also used in the Tahfidh graduation ceremony and the regular rite of purifying and cleansing the Ka'aba in Makkah in Islamic traditions.
The practice of burning incense has been prevalent in Ancient China since around 2000 BCE, with the earliest documented use of incense composed of herbs and plant products such as cassia, cinnamon, styrax, and sandalwood. Incense usage reached its peak during the Song dynasty, with buildings specifically erected for incense ceremonies. The introduction of Buddhism to China brought calibrated incense sticks and incense clocks, which were used for timekeeping.
In pre-Columbian Mexico and Peru, incense burners were made of terra-cotta or gold, and censers of precious metals with chains for hanging have been used in Christian churches since the 4th century. The burning of incense has also been practised in ancient Greece, pre-Columbian America, Morocco, and many other regions.
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Frequently asked questions
No, incense does not dissolve in water. Small quantities of water are added to the incense mixture to create a dough, which is then shaped and dried.
Incense is made from a combustible base, such as charcoal or wood powder, and a fragrant material. Natural plant-based binders like gum arabic or gum tragacanth are also added.
Swallowing liquid incense can be dangerous and is considered incense poisoning. If someone has swallowed liquid incense, give them water or milk right away and call the poison control centre.
Burning incense emits smoke, which contains particulate matter, gas products, and organic compounds. Research has shown that incense smoke contains carcinogens and irritants, which can lead to respiratory diseases and other health issues.
Some alternatives to burning incense include using an electric diffuser or a camphor burner. It is important to use incense correctly and in well-ventilated areas to reduce potential health risks.
