While breathalyzers are primarily designed to detect ethanol (the alcohol found in alcoholic beverages), they can sometimes react to other alcohols and organic vapors, including methanol (wood alcohol) and isopropanol (rubbing alcohol). However, they are not specifically calibrated to measure these substances, and their accuracy in doing so is limited.

Here's why:

* Sensitivity: Breathalyzers are typically calibrated to detect ethanol at very low concentrations, often in the parts-per-million range. They may not be sensitive enough to accurately detect other alcohols, especially if present in smaller amounts.

* Specificity: Breathalyzers rely on chemical reactions specific to ethanol. Other alcohols, while sharing some chemical properties, may not react in the same way or produce a strong enough signal.

* Interference: Other organic vapors, such as those from paint thinner or acetone, can interfere with the breathalyzer's sensors, leading to false positive results.

Important: If you suspect someone has ingested methanol or isopropanol, it's crucial to seek immediate medical attention. These substances can be highly toxic and lead to serious health complications.

In summary: While breathalyzers might react to some other alcohols and organic vapors, they are not reliable for accurately measuring these substances. If you need to determine the presence of specific alcohols or other organic vapors, specialized testing methods are required.