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The concern about the purity of HFC-134a arises from several factors that can negatively affect its performance and safety. Each of the aspects mentioned plays a crucial role in understanding why purity is essential.

Contamination with other refrigerants can introduce substances that change the chemical properties of HFC-134a, potentially leading to reduced efficiency and improper functioning of refrigeration systems. Different refrigerants have varying pressures and thermal properties, and mixed refrigerants can lead to system failures or even damage.

Moisture presence is another significant concern since the introduction of water can cause chemical reactions that lead to the formation of acids. These acids are corrosive and can harm various components within a cooling system, ultimately leading to system breakdown or reduced lifespan.

Incorrect storage conditions can also impact the purity of HFC-134a. Storing refrigerants in non-recommended environments can lead to the collection of impurities or changes in the refrigerant itself due to temperature fluctuations or exposure to contaminants.

Thus, recognizing that all of these factors contribute to concerns regarding the purity of HFC-134a is critical. Ensuring that HFC-134a is free from contamination, moisture, and stored properly is essential for maintaining its quality and the performance of systems using this refrigerant.