We had an incident last April with a glass vacuum tube as you 
described.  You can find the incident at the following link:

http://risk.arizona.edu/healthandsafety/chemicalsafetybulletins/explosion042008.shtml

Cynthia A. Runkel-Grant
Chemical Hygiene Officer
Chemistry Preproom Manager
University of Arizona Chemistry Department
Koffler 315         520-621-9979

At 09:14 AM 9/11/2008 -0400, ILPI wrote:
>>Has anyone encountered accidents involving glass pressure tubes which
>>were commonly used for organic synthesis in research labs? One example
>>of this can be found from Ace glassware
>>http://www.aceglass.com/html/2008/html/index_html.php?page=714
>>
>>We recently had an accident involving such a pressure tube which was
>>used for an organic reaction involving phenylmalemide, triphenylphospine
>>and para-formaldehyde in 3.4ml acetic acid, injuring 2 students who are
>>working in front of the fumehood. We are still investigating the
>>accident but initial assessment points to lack of hazard analysis as
>>well as other safety lapses.
>>
>>
>>Regards
>>Khaiseng
>>Department of Chemistry
>>National University of Singapore
>>khaiseng**At_Symbol_Here**nus.edu.sg

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