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Zyklon BQuestion:
Richard J. Green answers:Zyklon-B was hydrogen cyanide (HCN) impregnated in a porous solid support one of which was called Erco (a gypsum material), with a few other additives for stabilization and warning. See the articles below for more information: http://www.holocaust-history.org/auschwitz/chemistry/ http://www.holocaust-history.org/auschwitz/chemistry/not-the-science/ Best, Rich Green Another Question:
Harry W. Mazal OBE answers:Thank you for your very interesting query.I am one of the persons in the Holocaust History Project that responds to questions like yours. It is possible that you will receive other answers from my colleagues. You will have seen the various articles on our web-page, particularly Blausäure zur Schädlingsbekämpfung , and Die Einsatzfähigkeit der Blausäure-Durchgasung bei tiefen Temperaturen and Nochmals: Die Einsatzfähigkeit der Blausäure-Durchgasung bei tiefen Temperaturen If so, I would first refer you to:
AUSCHWITZ: Technique and Operation of the Gas Chambers Page 17: KL Auschwitz was supplied with Zyclon-B mainly by a firm called TESTA, and abbreviation for the Tesch und Stabenow Internationale Gesellschaft fuer Scaedlingsbekaempfung / international pest control company domiciled at Messberghoff, Hamburg 1. This company had the monopoly for distributing Zyclon-B in the eastern territories of the Reich (in fact to the east of the Elbe). But the Auschwitz SS, having at the same time to combat epidemics and carry out the 'special treatment' of Jews sometimes turned directly to Degesch (located in 1939-45 at 43, Schauminkai or 9, Weissfrauenstrasse, Franfurt am Main, then at 70, Kaserstrasse, Friedberg/ Hessen) to obtain quantities sufficient for their needs. For this reason a five ton truck with a trailer ran back and forth between Auschwitz and the factory producing Zyclon-B, the DESSAUER WERKE fuer Zucker - und Chemische Industrie, AG, 40, Askanische Strasse, Dessau (about 50 kilometers north of Leipzig). The 'reserve stocks' of the PMO have cans of Zyclon-B from both sources: Testa and Degesch (Dessauer Werke). Zyclon-B without a warning agent (ohne Warnstoff) or without irritant (ohne Reizstoff) was delivered by the Dessauer Werke as from August 1942. This was because of a LACK of the warning agent generally used, a bromoacetic ester. The Degesch laboratory people, who had remained at Frankfurt, would have liked to replace it by a chlorinated carbon xide [? HWM] ester (methyl chloroformiate) with a suffocating effect, but the Friedberg management decided to produce Zyclon-B with no warning agent. From the same book, page 201: Letter addressed to the staff and SS of the camp by its Commandant, Rudolf Hoess: [Cc list deleted for brevity - HWM] Pressac apparently believed that the warning agents were removed from the Zyklon-B because of a scarcity of the material. This does not make good sense to me as there were any number of other compounds that could have been used for that purpose. I believe that Hoess wished to spare his his S.S. staff the distress of seeing men, women and children suffer a horrible agony. Until Zyklon-B was obtained without the warning agent, the victims must have suffered greatly before succumbing to the hydrogen cyanide. The spectacle of victims dying a horrible death affected the S.S. guards. Without the agent, the victims would die quickly, suffer little, and not affect the minds of the S.S. guards. There are other views. From:
The Crime and Punishment of I.G. Farben
Joseph Borkin Page 123 There was still another episode that gave the officials of Degesch more than a hint of the dread purpose to which their Zyklon B was being put by the S.S. When manufactured as a pesticide Zyklon B contained a special odor or indicator to warn human beings of its lethal presence. The inclusion of such a warning odor was required by German Law. When the S.S. demanded that the new large order of Zyklon B omit the indicator, no one familiar with the workings of the S.S. could have failed to realize the purpose behind the strange request. The Degesch executives at first were unwilling to comply. But compassion was not behind their refusal. What troubled them was the fact that the S.S. request endangered Degesch's monopoly position. The patent on Zyklon B had long ago expired. However Degesch retained its monopoly by a patent on the warning odor. To remove the indicator was bad business, opening up the possibility of unwelcome competition [FN50). The S.S. made short shrift of this objection and the company removed the warning odor. Now the doomed wouldn't even know it was Degesch's Zyklon B. "[FN50] NI-1210, memorandum from Dr. Heinrich to Mr. Amend, dated June 21, 1944." I hope that this information assists you in writing your dissertation. If you need more information please do not hesitate to ask us for assistance. Yours sincerely, Harry W. Mazal OBE
Response from questioner:Dear Mr. Mazal Thank you for your help. It seems propable to me that in the first phase of using gas chambers with original Zyklon B the gas contained ethyl bromoacetate. The limit of insupportability of this chemical is 40 mg per cubic meter of air and the concentration of 10 mg per cubic meter of air provokes irritation of eyes. The physiology of this chemical was widely studied during and after the WWI, because it was used in gas shells. It was colorless and hard to detect. This type of chemicals were used, because they penetrated through gas masks and made the soldears to tear their gas masks off. In combination of more toxic war gases, like the phosgene, the irritants made the defence against gases harder. It is easy to understand that SS preferred not to use original Zyklon B with irritants and warning agents. I'm thankfull for your kind help. Here in Finland we don't have very detailed knowledge about the Holocaust. More detailed books are hard to find. It is not a part of our history because the Finns were not involved in it. Luckily this doesn't mean ignorance, and our schools teach the subject in a objective way. There have been no serious attempts of denying the Holocaust here. Thank's again. I wish you good luck.
Question:
Harry Mazal OBE responds:I am one of the persons in the Holocaust History Project who responds to questions from our readers. I apologize for the slowness in my response but I have been extremely busy for the past few weeks. The best source for obtaining information on Zyklon-B is in the United Kingdom. The Zykon-B Trial was held under the auspices of the British Military Court in Hamburg, much in the same way as the Belsen Trial, and over a dozen others:
Vol. I: The "Peleus" Trial* * Copies in my library. Although I have sought to purchase the other books, and especially the Zyklon-B Trial, I have not had any success. I have been told that these books were contracted out (Zyklon-B to J. Harcourt Barrington) but never published. This is most unfortunate because the trials were all extremely well documented and would have answered many of the questions which you (and many others) raise. The original papers, documents in evidence, and interrogatories must be held by some branch of HM's Government. You might try to obtain this information from the British Library. If you do find it please share it with us! I do have several volumes of the Law Reports of War Criminals: Selected and Prepared by the United Nations War Crimes Commission Volume 1 of which fortunately has a multi-page excerpt of the famous trial against Bruno Tesch, Karl Weinbacher, and Dr. Joachim Drosihn. You may view this excerpt in its totality by visiting my personal web site: and clicking on the Zyklon B Case link in "What's New on this Site." Other books that might be of use to you are:
Nazi Mass Murder: A Documentary History of the Use of Poison Gas*
I.G. Farben*
The Crime and Punishment of I. G. Farben
and, of course, the voluminous and seminal:
Trials of War Criminals before the Nuernberg Military Tribunals
under Control Council Law No. 10
A large number of the documents offered in evidence and
the testimonies of the witnesses refer to manufacturing
processes including those for 'poison gas.'
Could you please explain more fully what you wish to do with
this information?
I will continue to seek out more books on the subject. In
the meantime these few recommendations ought to be of
some assistance.
Yours sincerely,
Harry W. Mazal OBE
The short answer to your question, at least according to the courts and the proof, is that that they knew what
their product was intended for. According to remember.com,
Two German firms, Tesch/Stabenow and Degesch, produced Zyklon B gas after they acquired the patent from
Farben. Tesch supplied two tons a month, and Degesch three quarters of a ton. The firms that produced the gas already had extensive experience in fumigation. "In short, this industry used very powerful gases to exterminate rodents and insects in enclosed spaces; that it should now have become involved in an operation to kill off Jews by the hundreds of thousands is not mere accident."(Hilberg, Commandant, 567) After the war the directors of the firms insisted that they had sold their products for fumigation purposes and did not know they were being used on humans. But the prosecutors found letters from Tesch not only offering to supply the gas crystals but also advising how to use the ventilating and heating equipment. Hoess testified that the Tesch directors could not help but know of the use for their product because they sold him enough to annihilate two million people. Two Tesch partners were sentenced to death in 1946 and hanged. The director of Degesch received five years in prison. (Feig)
My colleague Harry W Mazal, OBE has addressed this question in our question and answer service at:
http://www.holocaust-history.org/questions/tesch-peters.shtml
and his personal site links to the Zyklon-B trial at:
http://www.mazal.org/archive/Zyklon-B%20Trial/
See the verdict at:
http://www.mazal.org/archive/Zyklon-B%20Trial/Zyklon-102.htm
In short, the firms knew what the Zyklon-B was being used for.
I hope this is helpful.
--
Best regards
Gord McFee
The long answer is explained in great detail in two essays by our member Dr. Richard Green (one of which
I co-authored). Please see:
http://www.holocaust-history.org/auschwitz/chemistry/
http://www.holocaust-history.org/auschwitz/chemistry/not-the-science/
In particular, in that second essay, scroll down to the line of argumentation that begins "How fast could a
lethal concentration be reached?" We address exactly this point.
http://www.holocaust-history.org/auschwitz/intro-columns/
The columns or "wire pillars" (which provided no structural support for the room, only protection for the
lowered basket) were described as having their outer layer of mesh made from 3 mm (1/8") diameter wire.
It is unlikely that the victims inside could do much to damage even that outer layer.
Keep in mind that as soon as they realized poison was being lowered in, the people nearest to the wire
columns died within a few seconds. Getting *to* the source of the poison, in order to futilely cause a little
easily-repaired damage to a wire column, would surely not be the immediate objective of the rest of the people
in the room.
It is easy for Holocaust-deniers to construct hypothetical scenarios, but one must take into account what
people would actually do: crowded naked into a concrete basement, locked in and helpless, confused, yet
led to believe that nothing would happen to them. When they realized the truth, they had moments to live.
This is not a scenario which would produce even a minimally successful rebellion. The Nazis had made sure
of that.
http://www.holocaust-history.org/auschwitz/body-disposal/
"Optimizing" the killing operation by making the gassing a few minutes faster would have been a waste of
time and resources. If it took 30 minutes instead of 20, nobody would have cared. It just would not have
mattered.
But -- you can probably think of answers to this question if you phrase it differently. Why were the gas
chambers underground, where it was cool? For one thing, that made it impossible for the victims to push
down the walls or otherwise cause significant damage to the room. For another, it hid the operation more
effectively from the sight and hearing of the rest of the camp. And from Allied overflights that might have
been looking for evidence of mass murder, perhaps (that is just speculation).
Finally, your question supposes that the temperature was a problem in the summer, when underground was
cooler. Please note that in the winter, the only time when Holocaust-deniers express concern about the
ambient temperature and the outgassing rate of Zyklon-B, it was
warmer underground.
So isn't underground exactly where such a room would have been constructed?
A few hours later, when it was completely spent, it could have been dealt with. Perhaps after the cremation
of the corpses was finished, or while it was still going on. The Zyklon could have been left where it was,
ground to dust under someone's heel, shoveled into a pit or the ditch a few dozen yards away, or any number
of other disposal methods. Most likely, it was just dumped into the ashes that remained of the victims, and
however they were disposed of, the Zyklon was as well -- as farm fertilizer, or dumped into the nearby river.
Bone fragments of the victims of Auschwitz-Birkenau litter the ground in places. But no dump full of Zyklon
has been found, that I know of. (Auschwitz was the only camp which used Zyklon in a large number of
homicidal gassings.)
I am not entirely sure what you are getting at regarding the delousing chambers. The same poison was used (but obviously there was no need for the wire mesh pillars, the doors with peepholes protected by wire mesh, etc.)
But again, I must question the relevancy of this question. The mass murder program in Nazi Germany evolved over time. Some methods of killing, at different times and places, were more capable than others. Since different methods were being tried, and different allocations of resources were more or less important at different places and stages of the war, it would not be at all surprising to find that, measured scientifically in retrospect, killing efficiency would go up and down.
But in this case, the engine-exhaust chambers of Belzec, Sobibor and Treblinka -- apparently some were diesel and some were not -- were followed the next year by the Zyklon chambers of Auschwitz, which were indeed more effective on a number of levels. If you find this surprising, I do not understand why.
And I repeat myself, but please note that questions about the "capability" of the poison gas are largely irrelevant, since the bottleneck of the operation was the disposal of the corpses.
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Last modified: January 3, 2004
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