Date: Wed, 5 Aug 2009 09:05:27 -0400
Reply-To: "Norwood, Brad" <Brad.Norwood**At_Symbol_Here**ARISTALABS.COM>
Sender: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
From: "Norwood, Brad" <Brad.Norwood**At_Symbol_Here**ARISTALABS.COM>
Subject: Re: Hypregolic Mixtures
In-Reply-To: <48A020E1942E024DB0F2A6B68A1312440774C3F052**At_Symbol_Here**>

rgin-top: 2.7pt;margin-right:2.7pt;margin-bottom:.7pt'>


I’m pretty sure that liquid hydrogen and liquid oxygen do NOT qualify as “hypergolic” – there IS an ignition source req uired to ‘start’ those engines (watch the next launch, and you’ll see the ‘sparklers&# 8217; going of just before main engine ignition).

With slightly clenched teeth, I’ll copy the link below


to the Wikipedia entry – there is a nice list (brief) of common hypergolic mixtures, plus some good history (if the writer knew what they w ere talking about, which is the caveat that always applies to Wiki entries̷ 0;)

Bradley K. Norwood, PhD

Laboratory Director

Arista Laboratories

1941 Reymet Road

Richmond, VA  23237

(804) 271-5572 ext. 307

(804) 641-4641 (cell)

brad .norwood**At_Symbol_Here**

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From: DCHAS-L Discu ssion List [mailto:DCHAS-L**At_Symbol_Here**] On Behalf Of Debbie M. Decker
Sent: Tuesday, August 04, 2009 8:28 PM
To: DCHAS-L**At_Symbol_Here**LIST.UVM.EDU
Subject: Re: [DCHAS-L] Hypregolic Mixtures

Red fuming nitric acid and hydrazine is another.  And the most familiar one of all – liquid oxygen and liquid hydrogen – the s pace shuttle fuel.



Debbie Decker

EH&S UCDavis


FAX (530)752-4527


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Better Place -- Visit and join the conspiracy

Birkett's hypothesis: "Any chemical reaction

that proceeds smoothly under normal conditions,

can proceed violently in the presence of an idiot."

From: DCHAS-L Discu ssion List [mailto:DCHAS-L**At_Symbol_Here**LIST.UVM.EDU] On Behalf Of William Crouse

Nitrogen tetro xide and hydrazine (or unsymmetrical dimethyl hydrazine) are two that I am aware of....




William E. Cro use, MS, CIH, CSP, CHMM
Director, Environmental Health and Safety
Wyeth Research
641 Ridge Road
Chazy, NY 12921-2420


518-846-6350 (office)
518-846-6527 (fax)

 >> > Suzanne Hamm <suzanne**At_Symbol_Here**POLYMERSOLUTIONS.COM> 8/4/2009 3:51:01 PM >>>

Does anyone have a list of chemicals that when combined cause hypergolic reactions? Just wondering because this warning came with our ICP , but have not been able to locate a list of common ones.

Suzanne Hamm

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