Safety and odorization in LPG distribution: Mercaptans are intentionally added to liquefied petroleum gas cylinders primarily to achieve what safety function?

Introduction / Context:
LPG is naturally odorless. To protect users, suppliers add trace odorants—commonly mercaptans (thiols)—to create a distinctive smell. Recognizing the reason for this practice is a key safety competency.

Given Data / Assumptions:

• Domestic cylinder use with regulators and stoves.
• Mercaptans added at ppm-level doses.
• Objective is immediate human detection without instruments.

Concept / Approach:
Odorization provides early warning of leaks before concentrations approach hazardous limits. It does not alter calorific value meaningfully or shrink flammability limits; the additive amount is tiny and chosen for odor potency, not energy content.

Step-by-Step Solution:

Verification / Alternative check:
Utility and refinery standards worldwide mandate odorization of otherwise odorless gases for domestic distribution to enhance safety and compliance.

Why Other Options Are Wrong:

Common Pitfalls:
Assuming odorization modifies combustion quality; its purpose is detection, not performance.

Final Answer:
Assist in checking and detecting cylinder leakage