FEATURE WINTERSAFETY
Cold weather introduces distinct hazards when handling and storing chemicals, making it essential to fully understand and address these risks. Lower temperatures can affect chemical properties and storage conditions, potentially transforming stable substances into hazards. Below are the primary dangers to consider during the winter months:
CHANGES IN CHEMICAL PROPERTIES Many chemicals are highly sensitive to temperature fluctuations. Cold conditions can alter their viscosity, solubility, and reactivity, leading to increased risk. For instance, some materials may thicken or solidify, complicating their use and raising the likelihood of spills or leaks. In some cases, chemicals can crystallise, adding further danger during freezing and thawing cycles.
Dangers of crystallisation
When chemicals freeze, crystallisation can occur, which may increase their instability once they thaw. This can lead to:
● Chemical instability: Certain substances become shock-sensitive or start to decompose after freezing.
● Concentration effects: As liquids freeze, the concentration of reactive components may increase, raising their potential for hazardous reactions.
● Physical changes: Crystalline structures formed during freezing may heighten volatility or reactivity upon thawing.
INCREASED RISK OF FREEZING Some chemicals, especially aqueous solutions, are prone to freezing in low temperatures. Freezing can damage containers, leading to leaks or the unintentional release of hazardous substances. Moreover, some chemicals may expand as they freeze, further straining their storage containers.
VAPOUR DENSITY CHANGES In cold weather, the vapour density of volatile chemicals may increase, causing dangerous vapours to settle closer to the ground. This increases the risk of inhalation exposure and creates a higher potential for explosive atmospheres in poorly ventilated areas.
EQUIPMENT MALFUNCTION Freezing temperatures can compromise equipment used to store or handle chemicals. Valves, pumps, and seals may become brittle, increasing the risk of leaks and malfunctions.
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POOR VISIBILITY AND SLIPPERY CONDITIONS Winter conditions can reduce visibility and create slippery surfaces, heightening the risk of spills or accidents during the transportation and handling of chemicals. These environmental hazards necessitate extra caution to avoid accidents.
ESSENTIAL WINTER SAFETY TIPS To mitigate the risks associated with cold-weather chemical storage and usage, consider implementing the following safety measures:
Assess chemical compatibility
Before winter, review your chemical inventory. Consult Safety Data Sheets (SDS) to determine the temperature limits for each substance and make sure sensitive chemicals are stored in appropriate conditions.
Maintain proper storage temperatures
Utilise temperature-controlled environments for chemical storage. Insulated containers or heated warehouses can help keep chemicals above freezing and maintain their stability.
www.tomorrowshs.com
As wintertime approaches, industries that rely on the storage and use of chemicals face unique challenges. Mike Brodie, Managing Director of Chemstore UK, highlights the risks posed by colder temperatures and shares strategies for maintaining safety throughout the season.
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