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Unread 07-14-2003, 03:11 PM   #72
Cooling Neophyte
Join Date: Apr 2003
Location: C-ville, VA
Posts: 6

Originally posted by pHaestus
.....As for an effective long term biocide, look at sodium azide. It is not nice stuff to work with (wear gloves!) but it is packed along with dialysis tubing so that it can be stored moist (it cracks when it dries out) over many months. I cannot at this moment comment on its chemical activity but take a look at it. .....
Yikes! DO NOT use sodium azide! Aside from the fact that it is a poison to humans on par with cyanide, it can react with copper (and lead) to form explosive metal azides.

Most pertanant part:

"Reactivity and Incompatibility

Sodium azide should not be allowed to come into contact with heavy metals or their salts, because it may react to form heavy metal azides, which are notorious shock-sensitive explosives. Do not pour sodium azide solutions into a copper or lead drain. Sodium azide reacts violently with carbon disulfide, bromine, nitric acid, dimethyl sulfate, and a number of heavy metals, including copper and lead. Reaction with water and acids liberates highly toxic hydrazoic acid, which is a dangerous explosive. Sodium azide is reported to react with CH2Cl2 in the presence of DMSO to form explosive products."
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