PG vs VG: Which Produces More Carbonyls When Heated—and How ASDF Manages the Risk

How PG and VG behave under heat

Most e-liquids are built on two core carriers: propylene glycol (PG) and vegetable glycerin (VG). Both are widely used in food and pharmaceutical applications, but when exposed to excessive temperatures, either can break down and form carbonyl compounds. Studies indicate that PG tends to degrade more readily than VG under extreme heat, generating higher levels of reactive byproducts when temperatures exceed safe vaporization ranges.

This means the real risk is not simply the PG or VG ratio, but how hot the liquid is driven during use. Poor power regulation, coil hot spots, or aggressive wattage are the primary triggers for unwanted thermal degradation.

How ASDF controls carbonyl formation

At ASDF, carbonyl prevention focuses on temperature control rather than formulation shortcuts. Devices across the lineup are engineered with precise power management to keep vaporization within stable thermal limits, regardless of whether the e-liquid leans toward higher PG or higher VG.

High-capacity platforms such as Vapetape TEMPO use regulated output and mesh coil architectures to distribute heat evenly. This prevents localized overheating that can cause PG or VG to degrade, even during extended sessions.

Flavor freedom without thermal stress

Because temperature is kept below degradation thresholds, ASDF can offer a wide range of flavor profiles safely and consistently. Crisp fruit blends like Melon Lychee and Pineapple Blackcurrant perform cleanly in TEMPO, while richer profiles such as Butter Popcorn in Vapetape UNPLUG retain their intended depth without harsh notes.

The real takeaway

PG may form carbonyls more easily than VG at extreme temperatures, but controlled power and coil design matter far more than the ratio alone. By engineering devices to operate within safe vaporization windows, ASDF ensures that both PG- and VG-based formulations deliver flavor and satisfaction while staying aligned with global compliance and safety standards.

For more information, visit www.asdfworldwide.com