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[Chemical Knowledge]：Specification for storage and transport of HDI

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In the field of chemical production raw materials, hexamethylene diisocyanate (HDI) is a common compound, which is widely used in polyurethane coatings, adhesives, elastomers and other fields. However, because HDI has certain toxicity and danger, it is necessary to strictly abide by relevant regulations during storage and transportation to ensure safety. This paper will detail the safe storage and transportation specification of HDI.

1. the physical and chemical properties of HDI

HDI is a colorless or slightly yellow transparent liquid with a strong pungent odor. It is an aliphatic diisocyanate, the molecule contains two active isocyanate groups, easy to react with active hydrogen containing compounds to generate the corresponding urethane. HDI is insoluble in water, but is miscible with many organic solvents.

2. the risk
of HDI
HDI has certain toxicity and risk, mainly in the following aspects:

1. Irritation: HDI has strong irritation to skin, eyes and respiratory tract, and may cause allergy, bronchitis, asthma and other diseases after exposure.

2. Toxicity: HDI has a certain degree of toxicity to the human body. Long-term exposure or inhalation of high concentrations of HDI vapor may cause damage to the nervous system, liver, kidneys and other organs.

3. Spontaneous ignition: HDI has a low spontaneous ignition point, and spontaneous combustion may occur under open flame, high heat and other conditions.

Therefore, during the storage and transportation of HDI, strict compliance with relevant regulations is required to ensure safety.

3. HDI security storage specification

In order to ensure the safety of HDI storage, the following measures need to be taken:

1. The storage place should choose a cool, dry, well-ventilated place, away from open flames, heat sources and other dangerous sources.

2. The storage container shall be a special container with good sealing performance to avoid HDI leakage and volatilization.

3. During the storage process, the sealing and integrity of the container should be checked regularly, and the abnormal situation such as leakage should be handled in time.

4. The storage site shall be provided with corresponding fire-fighting facilities and safety warning signs for emergencies.

4. the safety of HDI Transportation Regulations

In order to ensure the safety of HDI transportation, the following measures need to be taken:

1. The tightness and safety of transportation vehicles should be checked before transportation to ensure that there will be no accidents such as leakage during transportation.

2. During transportation, keep driving smoothly and avoid violent vibration and collision to avoid damage and leakage of the container.

3. Transportation vehicles shall be equipped with corresponding fire fighting equipment and safety protection equipment to deal with possible emergencies.

4. Relevant road traffic safety regulations shall be observed during transportation to ensure the safety and legality of transportation.
Emergency treatment measures for
5. HDI

If emergencies such as HDI leakage or fire happen carelessly, the following emergency treatment measures should be taken:

1. Immediately cut off the leakage source and absorb the leaked HDI with sand, dry lime and other adsorption materials.

2. For a small area of leakage, a large amount of water can be used to flush and dilute; for a large area of leakage, a cofferdam should be set for containment, and then transferred to a dedicated collector with a pump.

3. If there is a fire, extinguish the fire source with fire extinguishing equipment immediately, and cool the container with a large amount of water to prevent the container from breaking and exploding.

In short, HDI, as a common raw material for chemical production, needs to strictly abide by relevant regulations during storage and transportation to ensure safety. By taking scientific storage and transportation measures, the danger of HDI can be effectively reduced and the safety of people's lives and property can be guaranteed.

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