1,2-Diene-3-methylbenzene, although not mentioned in the name of precision in the era covered by Tiangong Kaiwu, its use can be deduced due to the alkenyl group and methylphenyl group contained in its structure.
The presence of alkenyl groups gives it a certain reactivity. In ancient chemical processes, it may be used as a raw material to participate in special chemical reactions. For example, in the production of pigments, compounds containing alkenyl groups can be combined with other pigment components to change the hue, luster and stability of pigments through ingenious processing. In fabric dyeing, its reactivity may be used to combine with fabric fibers to make dyeing more firm and lasting, and to present a unique color effect.
Its methyl phenyl part also has unique properties. The introduction of methyl groups affects the polar and spatial structure of the molecule, making the compound soluble and volatile to a certain extent. In ancient fragrance blending, or because of its special odor and volatility, it can be used as one of the fragrance components to add a unique aroma level. In drug processing, or due to the chemical properties of methyl phenyl groups, it participates in the transformation of pharmaceutical active ingredients to enhance or change the curative effect of drugs.
Although "Tiangong Kaiwu" does not directly describe 1,2-diene-3-methylbenzene, it is based on the principles of ancient chemical processes. Its potential uses in pigments, dyeing, fragrances, drugs, and many other fields may not be ignored, making a unique contribution to the development of ancient technologies.

1% 2C2-diene-3-methylindole, this substance is extremely rare and rare to see in the world. Its physical properties are very unique, let me tell you in detail.
Looking at its shape, under room temperature, it is mostly crystalline, white and radiant, just like the frost of a cold night, and like the dew newly formed in the morning, pure and flawless, under the sun, it reflects a strange brilliance and shines.
Talking about the melting point, about [X] degrees Celsius, when exposed to this heat, it is like ice melting in a spring stream, quietly turning into a flowing state. The boiling point is around [X] degrees Celsius, and at this time, it turns into a curling steam, rising between heaven and earth.
Its density is quite different from that of ordinary things, weighing about [X] grams per cubic centimeter, and it feels slightly sinking. And its solubility is also unique. In some organic solvents, such as fish in water, it can quickly blend with it, and it is seamless. However, in water, it is like oil floating in water, which is difficult to dissolve and clearly discernible.
In addition, the volatility of this substance is very small, and it has not been significantly reduced after being placed in a ventilated place for a long time. Its smell is also very unique. At first, there is a hint of elegant fragrance, just like the flowers of spring, leisurely entering the nose, and then under the fine taste, there is a faint hint of pungent taste, just like the bitter wood of cold winter, with a long aftertaste, which is unforgettable. This is the physical property of 1% 2C2-diene-3-methylindole, which is really a wonder of creation in heaven and earth.

1% 2C2-diene-3-methylindole, this physical property is unique. Its color may be light, at room temperature, or liquid or solid, depending on its structure and surrounding temperature and pressure conditions.
On the point of melting and boiling, it varies depending on the intermolecular force and structure. Intermolecular hydrogen bonds and van der Waals forces interact, resulting in different melting points. If the molecules are arranged regularly and the interaction is strong, the melting point will increase; otherwise, it will be low. The boiling point follows this principle, and is constrained by intermolecular forces. Those with strong forces have higher boiling points.
Its solubility is also interesting. In organic solvents, such as ethanol, ether, etc., or soluble. Due to the principle of "similar miscibility", organic solvents are close to the polarity of the compound and easily interact and dissolve. However, in water, because of its polarity, it is different from water, or insoluble.
In terms of chemical activity, 1% 2C2-diene-3-methylindole is active. At its double bond, it can play an addition reaction. When the electrophilic reagent approaches, the double bond electron cloud can act with it to form a new bond. The methyl group is connected to the indole ring, which affects the electron cloud distribution of the ring, so that the activity of the indole ring at a specific position becomes variable, or in the electrophilic substitution reaction, the specific position is preferred. Due to the density distribution of electron clouds in the structure and the interaction between atoms, it exhibits unique chemical properties and can be used as a key intermediate in the field of organic synthesis to participate in various reactions and produce many useful compounds.

The synthesis method of 1% 2C2-diene-3-methylnaphthalene is not directly recorded in "Tiangong Kaiwu", but the wisdom and methods of the ancients in chemical synthesis can be used for reference.
To make this product, you can start with the selection of raw materials. Ancient chemical industry, often local materials, this compound contains diene and methylnaphthalene structure, can be found containing alkenes and naphthalene substances at the beginning of the material. For example, some vegetable oils, after a specific refining method, may contain alkenyl groups. Naphthalene substances also exist in coal tar. Although the ancients did not know the exact composition of coal tar, they could extract naphthalene-like substances from coal tar by crude methods such as distillation based on their experience.
In the synthesis step, although the ancients did not have modern accurate equipment, they made good use of heat and time control. Using a kettle and pot as a device, under an appropriate heat, mix the selected raw materials. First adjust to a slow fire, so that the raw materials are slowly melted, and observe the change in color and smell during this period. After a little mixing and melting, gradually turn to the fire to accelerate the reaction. However, the control of the heat is very important. If the material is burnt and the reaction is excessive, if it is too late, the reaction will be slow and difficult to meet expectations.
The reaction time also needs to be accurately grasped, and it can be timed according to experience. Every once in a while, observe the state of the material, such as viscosity and fluidity. If the viscosity is too large or the reaction is excessive, the follow-up operation needs to be adjusted; if the fluidity is still strong, or the reaction is insufficient, it can be continued with an appropriate heat.
In terms of separation and purification, the ancient methods are mostly precipitation, filtration, distillation, etc. After the reaction is completed, let it stand to precipitate and remove its underlying impurities. Then filter with multiple layers of gauze to remove fine insolubles. Then by distillation, the target product 1% 2C2-diene-3-methylnaphthalene is separated according to different boiling points. During distillation, pay attention to the heat and condensation, so that the steam can be effectively condensed and recovered.
Although the ancient synthesis method is difficult to compare with today's precision science, its experience and wisdom are also of great significance in the exploration of chemical synthesis, which can provide different ideas for today's research.

For 1% 2C2-diene-3-methylindole, various precautions are of paramount importance during storage and transportation.
First, it is related to the storage environment. It is necessary to choose a cool and well-ventilated place, because the substance may be more sensitive to heat, and under high temperature, it may cause chemical reactions and cause it to deteriorate. And it must be kept away from fire and heat sources. Because of its flammability, it is easy to cause fire in case of open flames and hot topics. The storage place should be separated from oxidants, acids, etc., and must not be mixed with storage. If it encounters with such substances, it may cause severe chemical reactions, endangering safety. At the same time, the storage area should be equipped with suitable equipment to contain leaks, so as to prevent the leakage from happening in a timely and proper manner.
Second, when transporting, there are also many points. The transportation vehicle must ensure that the vehicle is in good condition and has reliable safety facilities and protective equipment to prevent accidents during transportation. The handling process needs to be light and light, and do not operate brutally, so as not to cause damage to the packaging and cause material leakage. During transportation, close attention should be paid to the weather conditions to avoid extreme weather such as high temperature and rainstorm. Due to bad weather or the impact on the stability of the substance. In addition, the transportation personnel must be professionally trained, familiar with the characteristics of the substance and emergency treatment methods. In the event of an emergency, they can respond quickly and correctly to ensure the safety of transportation. In this way, the safety of 1% 2C2-diene-3-methylindole during storage and transportation can be ensured to avoid accidents.