Mineral spirits, a petroleum-distilled solvent used primarily for thinning oil-based paints and cleaning, does not effectively dissolve polypropylene. Polypropylene is a thermoplastic polymer highly resistant to a wide range of chemical solvents, including mineral spirits. This resistance is due to its non-polar nature, which makes it inert to many types of chemical attacks. While mineral spirits can clean some surfaces of polypropylene by removing greasy substances or contaminants, they do not have the chemical capacity to break down or dissolve the polymer itself. For tasks requiring the dissolution of polypropylene, more aggressive chemicals like chlorinated solvents would be necessary, although their use is generally discouraged due to health and environmental concerns.

Polypropylene, a versatile and durable plastic, is known for its resistance to various chemical solvents, bases, and acids, making it a popular choice in containers and pipework for chemical processes. One of its strengths lies in its stability across a wide pH range. Generally, polypropylene is stable and shows good resistance in the pH range of 1 to 14. This means it can handle most acidic and basic environments without significant degradation. However, its performance can be influenced by factors such as temperature, concentration, and the presence of other chemicals. It's always recommended to consult specific resistance charts or conduct tests under the intended service conditions to ensure polypropylene's compatibility with a particular chemical or environment.

Polyvinyl chloride (PVC) is a widely used plastic found in numerous products, including pipes, cables, and packaging. While stable in its finished form, concerns arise regarding its production and disposal phases. PVC manufacturing and incineration release dioxins, potent carcinogens that harm human health and the environment. Additionally, the plasticizers added to make PVC flexible, such as phthalates, can leach out and pose toxic risks. These substances have been linked to hormonal disruptions, reproductive issues, and other health problems in both wildlife and humans. Mitigating these effects involves proper handling and recycling of PVC products, and seeking safer material alternatives whenever possible.