The Vespiary

The Hive => Chemicals & Equipment => Topic started by: Vaaguh on June 25, 2004, 02:41:00 PM

Title: KMnO4 shelflife
Post by: Vaaguh on June 25, 2004, 02:41:00 PM

On the label from an old Merck KMnO4 can there is a shelflife date reading 31.10.01.

A quick test using a drop of motor oil with a little bit of the KMnO4 gave a small fire so the KMnO4 seems reactive.

Is there any non commercial reason why a shelf life like that is stated?

Title: nope
Post by: hest on June 25, 2004, 02:53:00 PM

nope, it will last longer than you

Title: Reasons in a consumer society?
Post by: Nicodem on June 26, 2004, 09:40:00 AM

Is there any non commercial reason why a shelf life like that is stated?

Yes, an excellent reason: They want you to buy a new package.

Title: Container lifetime ?
Post by: Chimitant on June 29, 2004, 11:45:00 PM

I think the plastic conatiners they sell chemicals in don´t have eternal life. Maybe that they may might degrade and become permeable to air ? On the other hand, I have a rather large collection of plastic containers filled with cehmicals and almost all are in perfect conditions despite their age (3-15 years old). Maybe Nicodem is right after all and is the only reason money (as always).