CDs in a metal case -- okay to leave in a car?

Factual Questions
1

I just bought a metal case for traveling with CDs. When I’m not traveling, I usually leave the case in the car – would there be a problem with storing CDs in a hot car in a metal case?

2

So … that would be “what difference would the metal case make?”

3

Polycarbonate melts at around 375°F.
Some phthalocyanine dyes used for CDR’s decompose at 600°F

You should be OK heat-wise.

4

Thanks!