The Vespiary

The Hive => Chemicals & Equipment => Topic started by: dextro on July 26, 2004, 11:56:00 PM

Title: storage of benzaldehyd
Post by: dextro on July 26, 2004, 11:56:00 PM

can someone tell me how long BA can be stored, after the bottle is opened the first time?

thx

Title: cant give you a time limit.... but...
Post by: ApprenticeCook on July 27, 2004, 02:31:00 AM

cant give you a time limit.... but...

from the MSDS documentation...
Stability -Moderately stable. Oxidises readily. Oxidises in air to benzoic acid. This process is accelerated by light.
Materials to Avoid - Strong oxidising agents, strong reducing agents, strong bases, alkaline cyanide solution and heavy metal salts.
Storage Precautions - Store in cool place and out of direct sunlight. Store in well ventilated area. Store away from sources of heat or ignition. Store away from oxidizing agents. Keep containers securely sealed and protected against physical damage.

Hope that helped.
-AC

Title: Depends
Post by: jackhole on July 27, 2004, 03:16:00 PM

If you had some benzaldehyde that was from a reputable chemical supplier and came sealed in a dark bottle as it should have, it will be good several years after the seal is broken with proper storage. If you aren't sure, just distill it.

Title: Chemicals
Post by: hest on July 28, 2004, 06:12:00 AM

As usual It will last longet than you iff the lid is tight one. After some time you will see Benzoic accid in the lid, but that dosen't matter.
Moste pure chemicals last forewer.