Talk:1,4-Dichlorobenzene

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Untitled

How does it work? 69.140.164.142 03:37, 15 April 2007 (UTC) x —Preceding unsigned comment added by 71.211.143.181 (talk) 05:49, 3 December 2007 (UTC)[reply]

I've heard that there is no real benefit to using DCB in urinal cakes aside from the odor. Either how it works is not known, or it's known that it has no biocidal properties...can't say which. —Preceding unsigned comment added by 139.55.33.101 (talk) 15:28, 19 December 2007 (UTC)[reply]

This doesn't sound quite right: "Children should not be allowed to play with or drink toilet bowl water because it may contain p-DCB" —Preceding unsigned comment added by 208.54.15.246 (talk) 15:30, 19 December 2007 (UTC)[reply]

As though there isn't a more obvious reason!! I have removed it and improved the language so that it is more related to an article than a warning sticker--AssegaiAli (talk) 19:58, 19 December 2007 (UTC)[reply]

sublimate vs sublime

Normal chemical-speak is "sublimate", for both the noun and the verb. This is supported by some quick online checks, as well as my own (albeit limited) experience. The noun/verb distinction is made more clear in spoken form: the noun ("the flask is full of the sublimate") is spoken "sub-li-mit" ("mit", as in the thing you wear on your hand), while the verb ("it sublimates as we speak!") is spoken "sub-li-mate" (mate, as in partner, friend, etc).

And note that this is far from the only example in English: conflict, contest, contract, convert, convict, incline, insult, object, permit, present, product, project, protest, rebel, recall, reject, research, walk, etc ad nauseum. Indeed, checks on that subject show that not even English is unique in this noun-verb overlap.

So I've reverted the revert, and request that a Real Chemist be sworn to testify that "sublime" is normal chemical lingo before someone moves it back. mdf (talk) 05:01, 26 December 2007 (UTC)[reply]

Since I have a PhD in chemistry and I teach college chemistry I think I can say from experience in several countries that the accepted term for conversion from solid straight to gas is "sublime". I checked in the OED (shorter version) and this shows that both words are used as a verb in this meaning but sublime is of older currency while sublimate is well established as the noun but more recently is used as a verb possibly by back formation from the word sublimation. In this case sublime is more correct by prior usage. --AssegaiAli (talk) 19:46, 26 December 2007 (UTC)[reply]

References

Cathy A. McPherson, Armando Tanga, Peter M. Chapmana, Laura A. Taylorb and Stephen J. Gormicanc (2002). "Toxicity of 1,4-dichlorobenzene in sediments to juvenile polychaete worms". Marine Pollution Bulletin. 44 (12): 1405–1414. doi:10.1016/S0025-326X(02)00305-3.{{cite journal}}: CS1 maint: multiple names: authors list (link)
Hill RH Jr, Ashley DL, Head SL, Needham LL, Pirkle JL (1995). "p-Dichlorobenzene exposure among 1,000 adults in the United States". Arch Environ Health. 50 (4): 277–80. PMID7677426.{{cite journal}}: CS1 maint: multiple names: authors list (link)
Wang MJ, Bokern M, Boehme C, Jones KC, Harms H (1996). "Phytotoxicity, uptake and metabolism of 1,4-dichlorobenzene by plant cells". ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY. 15 (7): 1109–1114. doi:10.1897/1551-5028(1996)015<1109:PUAMOD>2.3.CO;2.{{cite journal}}: CS1 maint: multiple names: authors list (link)
Yoshida T, Andoh K, Kosaka H, Kumagai S, Matsunaga I, Akasaka S, Nakamura SI, Oda H, Fukuhara M (2002). "Inhalation toxicokinetics of p-dichlorobenzene and daily absorption and internal accumulation in chronic low-level exposure to humans". ARCHIVES OF TOXICOLOGY. 76 (5–6): 306–315.{{cite journal}}: CS1 maint: multiple names: authors list (link)
FISHER R, BARR J, ZUKOSKI CF, PUTNAM CW, SIPES IG, GANDOLFI AJ, BRENDEL K (1991). "INVITRO HEPATOTOXICITY OF 3 DICHLOROBENZENE ISOMERS IN HUMAN LIVER SLICES". HUMAN & EXPERIMENTAL TOXICOLOGY. 10 (5): 357–363. PMID1683550.{{cite journal}}: CS1 maint: multiple names: authors list (link)
Monferran MV, Wunderlin DA, Nimptsch J. "Biotransformation and antioxidant response in Ceratophyllum demersum experimentally exposed to 1,2- and 1,4-dichlorobenzene". CHEMOSPHERE. 68 (11): 2073–2079.{{cite journal}}: CS1 maint: multiple names: authors list (link)

Disinfectant

I searched with ISI and google scholar for anything proofing the disinfectant properties and found nothing. Has anybody any study or proof that this stuff does somthing besides smelling awful?--Stone (talk) 06:20, 26 June 2008 (UTC)[reply]

Ullmann's clearly states that disinfectants is the largest application. Possibly it does nothing, but people buy it now. Why did people buy naphthalene? I also cannot imagine any biological role (possibly a P450 inhibitor?). Regarding the above refernces, consider this fact: J. Phys Chem, just one of ca 30 journals from the Am Chem Soc, just one of possibly five major publishing units in just the chemical world, published 47,000 pages last year. So except for major discoveries, it is unrealistic to cite primary literature.--Smokefoot (talk) 12:26, 26 June 2008 (UTC)[reply]

I thought that somebody published something usefull on the disinfectant abilities, but no. The refs from above are the best I found on metabolism, which is important I think. The dichlorobenzene ends up in the urine as dichlorophenol. The toxicology says that it is not very toxic to liver cells. And whyt I find funny is that more than 90% of all americans contain significant amounts of p-dichlorobenzene and some upto 450 microgramm per liter urin. In the marine ocosystems it is used as marker for uncleaned sewage contamination in the sediment. So it might be nice to include this facts, if they benefit the article?--Stone (talk) 13:22, 26 June 2008 (UTC)[reply]

Does anyone know what the definition of...

CA登记号 is at http://product.cheminfo.gov.cn/J0116/J01160861.htm

http://www.google.cn/search?hl=zh-CN&newwindow=1&q=%22CA%E7%99%BB%E8%AE%B0%E5%8F%B7%E5%AE%9A%E4%B9%89%22+site%3Aproduct.cheminfo.gov.cn&btnG=Google+%E6%90%9C%E7%B4%A2&aq=f&oq=

http://www.google.cn/search?hl=zh-CN&newwindow=1&q=CA%E7%99%BB%E8%AE%B0%E5%8F%B7%E5%AE%9A%E4%B9%89+site%3Aproduct.cheminfo.gov.cn&btnG=Google+%E6%90%9C%E7%B4%A2&aq=f&oq= --222.64.222.141 (talk) 02:14, 11 August 2009 (UTC)[reply]

From the context and format, it sounds like CA登记号 means the CAS registry number. The value they list, 96384-17-7, does not match the one in our article, 106-46-7. Google-searching finds that both are used as the CAS# to refer to this chemical. I wonder if CAS renumbered it? I will ask around... DMacks (talk) 03:06, 11 August 2009 (UTC)[reply]

User:Beetstra found more info about the different CAS#s: there are for different isotopologues of the compound:

106-46-7 is the normal (natural abundance) form.
96384-17-7 has one of the chlorides labeled (C₆H₄Cl³⁸Cl).
84348-21-0 is C-14 labeled. Can't tell how many or which position(s) of the ring are ¹⁴C. (example refs doi:10.1002/jlcr.2580190703 and doi:10.1002/(SICI)1099-1344(199610)38:10<907::AID-JLCR909>3.0.CO;2-V).
3855-82-1 is the perdeuterated one (C₆²H₄Cl₂).

DMacks (talk) 15:49, 11 August 2009 (UTC)[reply]

Precursor to other chemicals section

This section contains an inaccurate statement, The chlorides on p-DCB can be substituted with oxygen,. You cannot substitute an oxygen (double bond) a substituent on an aromatic ring without loosing the aromaticity (in which case it would no longer be a benzene compound). Did the original author intend substituted with a hydroxl group (thus forming a phenol compound)? If we're going to have this section, I think it would also be useful to link to Friedel-Crafts as well (because this is the chief way that substitution is going to occur.--InsufficientData (talk) 14:45, 23 June 2010 (UTC)[reply]

I agree with the hydroxyl wording so have changed it.AssegaiAli (talk) 19:30, 28 June 2010 (UTC)[reply]

Dead link

During several automated bot runs the following external link was found to be unavailable. Please check if the link is in fact down and fix or remove it in that case!

http://monographs.iarc.fr/ENG/Classification/crthgr02b.php
- In 1,4-Dichlorobenzene on 2011-05-23 01:50:55, 404 Not Found
- In 1,4-Dichlorobenzene on 2011-05-31 15:28:39, 404 Not Found

--JeffGBot (talk) 15:29, 31 May 2011 (UTC)[reply]

Fixed. DMacks (talk) 17:42, 2 June 2011 (UTC)[reply]

Just an observation

The odor says "mothball-like", and it just so happens that this chemical is used in some mothballs, making that statement somewhat circular in logic. Someone should at least try to find a new description. 74.215.10.147 (talk) 20:54, 21 September 2015 (UTC)[reply]