Shellac
Shellac
CAS: 9000-59-3
Molecular Formula:
Shellac - Names and Identifiers
| Name | Shellac |
| Synonyms | Shellac Schellack Shellac Flake SHELLAC ORANGE SHELLAC GUM, ORANGE SHELLAC WAX-FREE, PH EUR SHELLAC ORANGE BEST QUALITY |
| CAS | 9000-59-3 |
| EINECS | 232-549-9 |
Shellac - Physico-chemical Properties
| Density | 1.035-1.140 |
| Melting Point | 115-120° |
| Solubility | Practically insoluble in water, gives a more or less opalescent solution (wax containing shellac and |
| Storage Condition | 2-8°C |
| Stability | Stable. Incompatible with strong oxidizing agents. |
| MDL | MFCD03101446 |
| Use | Insect film, also known as shellac lacquer or shellac film, is obtained by dissolving impurities from shellac raw glue through hot melt or solvent. According to different requirements, the shellac lacquer film finally produced has different colors. shellac lacquer is a kind of biological products, used in furniture and home interior paint, with no pollution, no irritating smell, non-toxic, no allergic symptoms to the skin, is a high-grade paint. Covering on ordinary paints and coatings can prevent formaldehyde gas from leaking to cause harm to the human body and prevent toxic substances from directly contacting human skin. China's insect film is mainly used for polishing wood furniture or as a primer varnish. Due to the increase of new paint varieties and the improvement of quality in recent years, the demand for shellac has decreased. Secondly, the international market has fallen and the export situation is not optimistic. The price of insect film fell. |
Shellac - Risk and Safety
| WGK Germany | 3 |
| HS Code | 1301900190 |
Shellac - Upstream Downstream Industry
| Raw Materials | Ethanol Sodium chlorate Activated carbon,decolor white shellac,white lac |
| Downstream Products | LACCAIC ACID CIVETONE |
Shellac - Reference
| Reference Show more | 1. [IF=3.114] Song Guangshuang et al."Effects of Pine Needle Essential Oil Combined with Chitosan Shellac on Physical and Antibacterial Properties of Emulsions for Egg Preservation."Food Biophys. 2022 Feb;:1-13 2. [IF=7.514] Ming Yin et al."The dual effect of shellac on survival of spray-dried Lactobacillus rhamnosus GG microcapsules."FOOD CHEMISTRY. 2022 Sep;389:132999 |
Shellac - Nature
Open Data Verified Data
The main component is an ester of photoperiostearic acid (9,10,16-trihydroxypalmitic acid). The crude product is purplish red, and is refined into yellow or brown shellac and white shellac. Melting Point: 115~120 ℃; Relative density: 11 02~1.12. Soluble in ethanol, ether and alkali solution, partially soluble in methyl acetate, ethylene glycol and acetone, insoluble in acid, water, benzene and other aromatic solvents. Have a certain degree of moisture resistance.
Last Update：2025-06-10 22:55:16
Shellac - Preparation Method
Open Data Verified Data
after the shellac on the shellac tree smoked and digested the sap, a lot of secretions were left on the branches, which were collected and processed to obtain shellac.
Last Update：2025-06-10 22:55:16
Shellac - Application
Open Data Verified Data
used as a coating agent. Shellac products are non-toxic and no side effects of green products, widely used in food preservation, cosmetics and other aspects. China's provisions can be used for wafer biscuits, chocolate candy, the maximum use of 0. 20 g/kg. Chocolate after coating can prevent moisture, give bright luster.
Last Update：2025-08-19 16:24:40
Shellac - Nature
Basic information
Chinese name shellac lacquer foreign name Shellac
Molecular formula C60H90O5 molecular weight 964-1100
Magnetic susceptibility -0.30 × 10-6 softening point 65-70 ℃
Melting point 75-80 ℃ acid value 65-75
Saponification value 220-230 density g/cm3 1.143-1.207
main components shellac resin, shellac pigment, shellac wax, sugar, protein, etc.
the best solvent for soluble shellac paint is lower alcohols containing hydroxyl groups, such as methanol and ethanol. Insoluble in ethylene glycol and glycerin, soluble in lye, ammonia water, and also soluble in lower carboxylic acids, such as formic acid and acetic acid, insoluble in fats, aromatic hydrocarbons and their halogen derivatives, carbon tetrachloride, water, Aqueous solution of sulfur dioxide.
Viscosity The shellac solution is molecularly dispersed in the case of dilute, but in the case of concentrated solution, the resin is solvated and exhibits a larger viscosity. The solution viscosity of shellac paint sheet dissolved by double solvent is almost half lower than that dissolved by ethanol alone.
Safety shellac resin is degradable in natural environment. Drainage into the water will cause the increase of good oxygen content in the water body, make the water eutrophication, and make the water body red in the senses. At present, for the discharge of shellac waste in our country, it is recommended to be discharged into the sludge drying plant. After sand filtration, it enters the sewage treatment station and then discharges it after reaching the standard.
Last Update：2024-04-10 22:29:15
Shellac - Toxicity
Chinese traditional purple stem (called "purple grass antler") is used as a traditional Chinese medicine for clearing heat, cooling blood and detoxification, and no harmful effect has been found in long-term use.
ADI is allowed to be used (as currently used as coating agent and surface treatment agent is not toxic: FAO/WHO,2001).
permitted use (as currently used as coating agent, surface treatment agent is not toxic; FAO/WHO,2001).
Use limit
GB 2760-96: chocolate candy and wafer biscuit 0.20 g/kg.
EEC stipulates a limit of 0.4%(1990) for cake decorating, foaming orange juice and candy.
use limited GB 2760-96: chocolate candy and puffed chocolate 0.20 g/kg.
Last Update：2024-04-09 20:45:29
Shellac - Application
uses apple and citrus glazing coating agent, gum gum base, roasted coffee and coffee substitute glazing agent.
Application Coating agent (mainly used for candy), surface decoration agent, glazing agent (chocolate products, etc.), beverage turbidity agent.
The coating agent can be used in wafer biscuits and chocolate candy according to regulations in China, with a maximum usage of 0.20 g/kg. Chocolate coating can prevent moisture and give bright luster.
Last Update：2025-08-19 16:24:40
Shellac - Production method and identification
Production method
shellac is a resinous substance secreted by shellac worms parasitic on certain plants. There are two methods of extraction.
Thermal filtration
The secretions of shellac worms together with branches, I .e. purple stems, are broken, sieved and decolorized to obtain semi-finished products (containing water 10% ~ 20%); The product is obtained by hot filtration, glue washing, dehydration and tabletting.
Solvent method
The purple stem is broken, sieved, washed and dried to obtain semi-finished products, then dissolved in alcohol and filtered to remove insoluble substances. Then alcohol is recovered by decompression and concentration, and the residual liquid is tableted to obtain the product.
Production method
dissolve shellac (shellac, see "13106") in sodium carbonate solution, decolorize with activated carbon (the prepared from this is called decolorized purple film or decolorized white shellac), or bleach with sodium hypochlorite (the prepared from this is called bleached shellac or bleached shellac), then precipitate it with dilute sulfuric acid (if dewaxing is required, cool and filter first), separate it, and then dry it into granular or flaky finished products.
Production method The purple stem is crushed, sieved, washed and dried into granules, dissolved with alcohol and filtered, vacuum concentrated and pressed into flakes.
identification test
add drops of mixed solution of 1g ammonium molybdate and 3ml sulfuric acid to 50mg sample. It should be green and lavender when neutralized with ammonia test solution (TS-13).
Solubility is insoluble in water, easily soluble in ethanol (dissolution speed is very slow), slightly soluble in acetone and ether.
Acid value 68~89(FAO/WHO).
Last Update：2024-04-09 01:59:51
Shellac - Characteristics
features
Excellent properties such as moisture resistance, corrosion resistance, rust resistance, oil resistance, electrical insulation and thermoplastic
APPLICATION
Since the main component of shellac paint sheet is shellac resin, it has strong adhesion to smooth surfaces such as glass, metal, mica, etc., and its alcohol solution or alkali solution can adhere to various objects well The surface forms a smooth, bright and durable paint film, and it is non-toxic, so it can be widely used in food, medicine, military industry, electrical, ink, leather, metallurgy, machinery, wood, rubber and other industries.
The shellac lacquer in the wood industry is simple, easy to use, strong adhesion, rapid drying, smooth paint film, hard, transparent, elastic, uniform luster, and good for wood secretions, bulky amine colorants and asphalt. Isolation or sealing effect, etc. It has been widely used in the wood industry for a long time. Especially in recent years, due to the toxicity of formaldehyde finishing agents to human body. Many high-end wood and decoration have switched to shellac paint.
- the food industry is used for fruit preservation coating, which can form bright films, prolong the shelf life of fruits and improve their commodity value. Used for candy and pastry coating to improve brightness, prevent moisture recovery, and apply the inner wall of metal cans to prevent food from contacting metal.
- Leather industry bright and protective finishing agent, characterized by fast drying, strong filling force, can firmly adhere to the leather, making it softer and more elastic. And present a gorgeous luster.
- military industry is mainly used as coating agent, insulating material and blocking agent of gunpowder mixture. And used to make anti-ultraviolet and anti-radiation military equipment.
- electrical industry manufacturing insulation board, laminated mica board, grinding electrical insulation, insulation varnish, bulb, fluorescent lamp and tube welding mud.
- The rubber industry is mainly used as a surface coating or filler for rubber products. It can improve the beauty of rubber products and improve their wear resistance, oil resistance, acid resistance, water resistance and insulation. Slow down the aging process, extend the service life, and improve the physical, mechanical, and performance of rubber, such as strength, tension resistance, and tear resistance.
- paper industry manufacturing insulation paper, industrial packaging paper, but also as a decorative and protective coating agent used in coated paper, food packaging paper, lampshade paper, etc.
- Other aspects of medical equipment, matches, toothpicks, barrel making, hat making, mirror making, sporting goods, sculpture, jewelry processing adhesives.
Last Update：2024-04-09 01:59:51
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Raw Materials for Shellac
Downstream Products for Shellac