Storage of butane/propane canisters

[peregrinator]

According to the labels, one of my butane/propane canister which should be stored below 40 degrees and a different brand shouldn't be exposed to temperatures above 50.

Either way, it's well known that if the outside temperature is, say 30 degrees, the temperature inside a car can be 50 or 60. So on those figures, I guess it might be unwise to leave a spare 230g canister in my car on a hot day. Should I hide my spare/s in the vegetation?

To put this in context, I've only recently replaced an ancient puncture-style stove with a threaded one. (And paying a lot more for the fuel, unfortunately.) I've left the old canisters in my car on numerous trips for years without any issues. But was so accustomed to the old style that I don't recall ever reading the label, so perhaps they also had a label warning. I can't find any useful information on canister storage anywhere so I hope someone can fill me in.

[peregrinator]

Sorry, I meant to post this on the Equipment forum!

[icefest]

I usually put them under a seat. They're unlikely to get too hot there.

Among the places not to store them:

Dashboard
Car seat
On top of the rest of the things in your boot.
In the oven
Near the fireplace
In the attic
..around here somewhere... I swear I put them there...

[north-north-west]

Coolest place in the car is in the pack with a bit of extra insulation on top/around. I usually have a spare sleeping bag & mat in there because I often overnight in the car prior to a walk - that's the extra insulation. Never had any trouble, even in the tropics.

[ggorgeman]

Slightly off topic but on a lads fishing trip, the fellows in charge of cooking had used a canister stove to heat the heatbeads for a spit. The canister in the stove exploded due to the heat. Fortunately, no-one was nearby. Not really comparable to a car scenario but does confirm that they need to be treated with care.