Do solid organic substances have a flash point?

Take a look at this answer on the forum. http://bbs.hcbbs.com/thread-256465-1-1.html

The solid itself does not have any; the vapors emitted by the solid are: handshake

I checked the link to the post on floor 2 on behalf of the original poster, and found this sentence: The flash point is the lowest temperature at which the vapor generated on the surface of a flammable liquid or solid, in a stable air environment, catches fire when exposed to a test flame； The flash point is the lowest temperature at which a flammable liquid or solid can release enough vapor to form a flammable mixture with air at the surface of the liquid or solid within its container

It should be there if you consider it carefully. I read a book on safety that discussed the flash point of solid combustibles. The solid itself does not possess it, but its dust does. Pay attention!

I can’t agree with what was said above. Dust is just dust. In my opinion, combustible solids that can sublimate have a flash point; those that don’t do not

The flash point is the lowest temperature at which a flammable liquid or solid can release enough vapor to form a flammable mixture with air at the surface of the liquid or solid within its container. Flash ignition of combustible solids: When a combustible solid is heated to a certain temperature, it will experience a flash ignition that occurs instantly and then dies out; the lowest temperature at which this flash ignition takes place is known as the flash point. Based on the above definition, it can be concluded that solids that sublimate easily generally have a flash point.

If it does not meet the requirements of those eight categories specified in GB13690-92, it is not considered a hazardous chemical.

I disagree with the person above; isn’t the determination of hazardous chemicals based on a list?

The poster mentioned in the post that \"this additive is a solid organic substance.\" The definition of organic substances states that \"there are many types of organic substances; they generally have high volatility, low melting and boiling points, and undergo reactions slowly (in a complex manner).\" It is soluble in organic solvents and can burn. ”It complies with the relevant provisions of Item 5 on hazardous characteristics in the Classification and Labelling of Commonly Used Hazardous Chemicals specified in GB 1690—92; therefore, I believe it constitutes a hazardous chemical.

A look at the definition of flash point will make this clear: The flash point is the lowest temperature at which, in a stable air environment, the vapor generated from the surface of a flammable liquid or solid ignites when exposed to a test flame. In other words, it is the lowest temperature at which a flammable liquid or solid can release enough vapor to form a flammable mixture with air at the surface of the liquid or solid within its container. The flash point of flammable liquids changes with their concentration. 　　The flash point, also known as the ignition point, is the temperature at which a mixture of vapor and air above the surface of a flammable liquid begins to emit sparks when in contact with fire. The flash point of various oils can be determined using standard instruments. The lowest temperature at which the vapor resulting from the evaporation of a liquid, mixed with air, can catch fire is determined using the closed-cup method. The flash point temperature is lower than the ignition point temperature. From a fire safety perspective, the flash point of a liquid is the lowest temperature at which it can cause a fire. The lower the flash point, the greater the risk of fire. As for whether it is a hazardous chemical, it depends on whether the conditions specified in the hazardous chemical classification are met. Category 1: Explosives. Explosives are substances that, under external influences such as heat, friction, or impact, can undergo violent chemical reactions, generating large amounts of gas and heat in an instant. This leads to a sharp increase in pressure, resulting in an explosion that causes damage and harm to the surrounding environment, equipment, and people. Explosives are classified into 5 categories in the **standards, of which 3 include hazardous chemicals, while the other 2 refer specifically to ammunition and similar items. 　　Item 1: Substances and items with a risk of overall explosion, such as perchloric acid. 　　Item 3: Substances and items with a burning hazard and a low explosion hazard, such as dicyanamide. 　　Item 4: **Substances and items without significant hazards, such as tetrazolo[1]-acetic acid. 　　Category 2: Compressed gases and liquefied gases, referring to gases that are compressed, liquefied, or dissolved under pressure. When such items are exposed to heat, impact, or severe vibration, the pressure inside the container increases sharply, causing the container to rupture and leading to leaks or explosions. It is divided into 3 items. 　　Item 1: Flammable gases, such as ammonia, carbon monoxide, methane, etc. 　　Item 2: Inert gases (including oxidizing gases), such as nitrogen, oxygen, etc. 　　Item 3: Toxic gases, such as chlorine (liquidated), ammonia (liquidated), etc. 　　Category 3: Flammable liquids. Substances in this category are volatile at room temperature, and their vapors, when mixed with air, can form explosive mixtures. It is divided into 3 items. 　　Item 1: Liquids with a low flash point, namely liquids whose flash point is below -18°C, such as acetaldehyde, propanol, etc. 　　Item 2: Liquids with a medium flash point, that is, a flash point of -18℃—

I’m not sure what the original poster aims to determine regarding hazardous chemicals; if it’s for a safety assessment, then check the \"List of Hazardous Chemicals 2002\" – if it’s listed there, then it is. If you just want to supervise it yourself, then it should be treated as a hazardous chemical. Some solids have a flash point; check the manual. Additionally, not all hazardous chemicals are determined by their flash point.

Solids or liquids have a saturated vapor pressure; therefore, the interface between them and air is a mixed gas. If this mixed gas reaches a certain concentration, it can ignite spontaneously, although the saturated vapor pressures of solids are generally very low.