Repackaging Example

Referring to the questions in Chapter 3, Question 1 ( Is intentional chemistry performed at your facility ) can be answered NO for this example, since the unloading, storage and repackaging operation involves no intended chemical reactions. Likewise, Questions 2 and 3 can be answered NO, since mixing and physical processing are also not intended. Question 

4 should be answered YES, since propylene dichloride (1,2-dichloro-propane) is a flammable liquid, having a flash point of 60°F (16°C). 

Group compatibility data indicates no reaction between propylene dichloride and aluminum oxide (which would form an outside layer on the aluminum metal). However, heat generation, may cause pressurization and forms very unstable explosive metallic compounds are the results of combining propylene dichloride and aluminum powder (NOAA 2002). 

A literature review of previous incidents found a reported incident where an aluminum railcar filled with this material leaked from the railcar within 24 hours. Based on this information, it was decided that positive steps needed to be taken to  

If more severe consequences than a leaking railcar were found, then even greater precautions would likely be warranted. These precautions would need to ensure no material is received in an aluminum container. Also, aluminum must be excluded from the facility as a material of construction in pipes, tanks, valves, pumps, and especially any container in which product would be transferred to a customer. 

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Examples Paint formulating Powder mixing Diluting with solvent Blending Examples Size reduction Warehousing Repackaging... 

Water-reactive materials, screening methods, 47,49-50, 51 Worked examples, 119-134 combustor, 120, 122-124,125 intentional chemistry, 119-120,121 mixing, 128,130-132 oxygen system, 133-134 physical processing, 128,129 repackaging, 124,126-127... 

Nerve cells communicate by the release of chemicals (neurotransmitters) into the space between the cells (Figure 15.2). The neurotransmitter is typically stored in a small packet (synaptic vesicle) and then released in response to a signal that is transmitted down the cell axon. In the example in Figure 15.2, dopamine, an important neurotransmitter involved in movement disorders related to Parkinson s disease, is released into the gap (synaptic cleft) and reacts with specific receptors on the adjacent cell. This in turn causes a reaction in the adjacent cell. Dopamine in the gap can either be broken down or taken back up into the cell that released it and repackaged for future use. 

Are specific packaging/repackaging instructions (for example, specific container type, pounds) documented ... 

To prepare a synapse to respond to another signal, the neurotransmitter must be removed quickly from the synaptic cleft. In some cases, the transmitter is taken up by the presynaptic neuron and repackaged in synaptic vesicles in other cases, it is broken down by extracellular enzymes. Acetylcholine, for example, is hydrolyzed rapidly to choline and acetate by the enzyme acetylcholinesterase. 

Leading distributors offer a broad spectrum of these services. Brenntag, for example, as a full-line distributor of industrial and specialty chemicals, provides a one-stop shop of over 25,000 chemical products for more than 150,000 customers, combined with a broad range of related value-added services such as mixing, blending, repackaging, and technical services and support. 

Products on the market to date tend to be a repackaging of existing products, for example ISPs Index Chemicus subsets and the BIOSIS Information Transfer Subsystems (B-I-T-S). They are aimed at the end user, not the information specialist, and are priced at a level that the end-user can afford. They are packaged with retrieval software and the vendors are aiming for high volume production. 

As compared to non-adsorbent fabrics that could also be used to remove hazardous liquids contaminants from solid surfaces, the adsorptive properties of the activated carbon fabrics mitigates off-gassing from used wipes. When the used wipes are repackaged in a sealable hermetic envelope, the adsorptive properties provide a redimdant means of agent isolation. The used wipes can thus be safely handled imtil they are destroyed, for example, by incineration, or decontaminated by standard means, such as immersion in bleach solution. 

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