Is paraffin wax harmful?

Paraffin is the common name for a mixture of solid high-level alkanes with the molecular formula CnH2n+2, where n=20~40. paraffin can be produced from the wax-containing fractions of natural or man-made oils by cold pressing or solvent dewaxing, sweating, etc.
Chemical Properties
Paraffin is a colorless viscous liquid, when burned, it generates toxic gas containing carbon monoxide. Paraffin wax is chemically stable, does not react with acids, alkalis, oxidizing agents, reducing agents, the color will turn yellow under ultraviolet radiation, can be burned and decomposed, stable at room temperature.

Uses
Paraffin is the main component of candles. Pure paraffin is a good insulator, with a resistivity of 1013-1017 ohm-meters, higher than most materials except certain plastics (especially Teflon).

Paraffin is also an excellent heat storage material, with a specific heat capacity of 2.14-2.9 J-g-1-K-1 and a heat of fusion of 200-220 J-g-1.

Hazard
Paraffin itself is harmless to the human body. Liquid paraffin, if used improperly, may cause skin hazards such as allergies, damage to the skin or clogging of pores . Therefore, you should be aware of possible skin reactions when using liquid paraffin and seek medical attention in case of discomfort.