you're right. I was thinking of a different product code, although in hindsight the pink cartridge is a dead giveaway. Only P100 filters are allowed to be pink.
That being said, there are many organic vapor / acid gas cartridges on the market that are NOT P100 rated particulate filters. The 3M 6001 filter cartridge is an excellent example (they're light grey) of one that is not certified for particulate filtration.
The morale of this story is to always check the individual filter you're using to see what it was designed to do. P100 is not meant for organic vapor, and organic vapor filters are not designed to stop fine particulates. There are combo filters out there, but don't assume.