There is only one word difference between calcium carbonate and calcium carbide, please pay attention to the transportation declaration!

Two solids, two completely different things, two things with different chemical properties, just because there is only one word difference in their names, and because most people do not understand it, have been exploited by some people, causing serious accidents and property damage. loss.

Recently, a shipper's agent declared goods named "calcium carbonate" to be exported abroad. However, there was irrelevant information between the documents, and he was suspected of concealing the declaration matters. After the competent authorities opened the box and inspected it, they discovered something fishy. The box contains not calcium carbonate, but a white crystal.

After inspection, the goods were calcium carbide! Why hide it?

After checking, there is no calcium carbonate in the rules, but calcium carbide is clearly listed. Calcium carbonate is widely and safely found in nature, such as stalactites, which we can often see in various cave landscapes. At the same time, calcium carbonate is also one of the pharmaceutical ingredients for calcium supplements. It is a very stable salt and is friendly to humans. Calcium carbide is different. Its dangerous chemical properties determine that it cannot exist independently in nature, and its reactions are violent and terrifying. Safety measures must be taken during transportation and transported as dangerous goods.

It turned out that in order to reduce costs and evade supervision, the cargo owner teamed up with the agent to falsely declare the dangerous goods calcium carbide as ordinary goods calcium carbonate, in an attempt to hide the truth! Next, let’s talk about the dangers of calcium carbide in detail.

Calcium carbide, a solid, rapidly releases the highly flammable gas acetylene on contact with water, which can be ignited by the heat of the reaction. Acetylene can form highly explosive mixtures with some heavy metal salts. Reacts violently with acids.

Calcium carbide is transported in two forms:

01

Calcium carbide 1, 4.3 dangerous goods, UN1402, sp951, packaging category I, packaging regulations P403, PP31, IBC04, B1, stowage categories B, H1, SG26, SG35.

This entry is for calcium carbide in packaging category I, which belongs to Category 4.3 substances that release flammable gases when exposed to water. The packaging should comply with the requirements of the P403 guideline. Combination packaging or single packaging can be selected, but the maximum weight limit for a single packaging is 250kg. Composite packaging can also be used on a limited basis, but no matter what packaging is chosen, it must be airtight.IBCs can be selected, but they must be metallic and can only be selected from several forms defined in the list. For example, IBCs must be transported in closed cargo transport components or freight containers, and freight vehicles must have at least the height of IBCs. Rigid side walls or fences. If a bulk container is selected, it must have an air-tight opening and a nitrogen covering. This form of calcium carbide cannot be transported in movable tanks.

Cargo may be stowed on deck or in spaces, but shall be kept as dry as reasonably practicable. A minimum of two boxes shall be maintained in the transverse direction with Classes 2.1 and 3 when loaded on container ships, and in the transverse direction with Classes 2.1 and 3 when stowed on ro-ro ships 6 meters minimum. Keep away from SGG1 acids.

02

Calcium carbide 2, flammable solids of class 4.3, UN1402, sp951, packing group II, packing regulations P410, PP31, PP40, IBC07, B4, B21, stowage classes B, H1, SG26, SG35.

This entry is for calcium carbide in packaging class II, which still belongs to class 4.3 substances that emit flammable gases in contact with water. The packaging should meet the requirements of the P410 guidelines. Compared with 403, it is looser. Combination packaging, single packaging or composite packaging can be used. Yes, but bag packaging is not allowed, but no matter what packaging is selected, it must be an air seal.Optional medium bulk containers, optional metal, rigid plastic, composite packaging and wood, such as flexible, fiberboard or wood, must be anti-leakage, waterproof or have anti-leakage and waterproof lining. All selected IBCs must be transported in closed cargo transport components or freight containers, and freight vehicles must have rigid side walls or fences at least the height of IBCs. This form of calcium carbide also cannot be transported in removable tanks.

Stowage and segregation requirements are the same as for packing group I.