Difference between revisions of "Butane-1,4-diol"

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|  FlashPt = 121 ºC (open cup)
 
|  FlashPt = 121 ºC (open cup)
 
|  Autoignition = 350 ºC
 
|  Autoignition = 350 ºC

Revision as of 09:30, 29 August 2009

1,4-Butanediol
1,4-butanediol.png
14bd3d.png
IUPAC name Butan-1,4-diol
Other names Tetramethylene glycol
Identifiers
InChI InChI=1/C4H10O2/c5-3-1-2-4-6/h5-6H,1-4H2
CAS number [110-63-4]
EC number 203-786-5
RTECS EK0525000
ChemSpider 13835209
SMILES
Properties[1][2]
Chemical formula C4H10O2
Molar mass 90.121 g/mol
Density 1.0171 g/cm3 (20 ºC)
Melting point

20.1 °C

Boiling point

235 °C

Solubility in water miscible
Solubility in ethanol soluble
Refractive index (nD) 1.4460 (20 ºC)
Hazards[2][3]
EU index number not listed
GHS pictograms Acute Tox. (oral) 4
GHS signal word WARNING
GHS hazard statements H302
GHS precautionary statements P264, P270, P301+312, P330, P501
Flash point 121 ºC (open cup)
Autoignition temp. 350 ºC
Related compounds
Other butanediols 1,2-Butanediol
1,3-Butanediol
2,3-Butanediol
Other compounds Succinaldehyde
Succinic acid
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

1,4-Butanediol is the organic compound with the formula HOCH2CH2CH2CH2OH. This colorless viscous liquid is derived from butane by placement of alcohol groups at each end of the chain. It is one of four stable isomers of butanediol.

Synthesis

In its industrial synthesis, acetylene reacts with two equivalents of formaldehyde to form 1,4-butynediol, also known as but-2-yne-1,4-diol. This type of acetylene-based process is illustrative of what is known as "Reppe chemistry", after German chemist Walter Reppe. Hydrogenation of 1,4-butynediol gives 1,4-butanediol.

It can also be manufactured on an industrial scale by the vapour phase hydrogenation of the esters and anhydrides of maleic acid and succinic acid.

Genomatica (a San Diego-based company) has genetically engineered E. coli to metabolize sugar into 1,4-butanediol. They expect to build and begin operating a pilot plant by the end of 2009. Genomatica CEO Christopher Gann said the process consumes 32,000 BTU per pound of 1,4-butanediol (75 MJ/kg), far less than the acetylene-based process, and does not have any by-products.[4][5]

Industrial use

1,4-Butanediol is used industrially as a solvent and in the manufacture of some types of plastics, elastic fibers and polyurethanes. In organic chemistry, 1,4-butanediol is used for the synthesis of γ-butyrolactone (GBL). In the presence of phosphoric acid and high temperature, it dehydrates to the important solvent tetrahydrofuran.[6] At about 200 °C in the presence of soluble ruthenium catalysts, the diol undergoes dehydrogenation to form butyrolactone.[7]

World production of 1,4-Butanediol is about one million metric tons per year and market price is about 2,000 USD (1,600 EUR) per ton (2005). Almost half of it is dehydrated to tetrahydrofuran to make fibers such as Spandex.[8] The largest producer is BASF.[9]

Health effects and use as a drug

FDA warning against products containing GHB and its prodrugs, such as 1,4-Butanediol.

It is also used as a recreational drug known by some users as "One Comma Four", "One Four Bee" or "One Four B-D-O". It exerts effects similar to γ-hydroxybutyrate (GHB), which is a metabolic product of 1,4-butanediol.[10][11]

Anecdotal reports indicate that 1,4-butanediol produces a strong toxic feeling not present with GHB when ingested.[12] These reports also indicate that it may cause damage to the liver as well as to other vital organs.[13] Abuse has also resulted in addiction and death.[14]

Pharmacokinetics

1,4-Butanediol is converted into GHB by the enzymes alcohol dehydrogenase and aldehyde dehydrogenase and differing levels of these enzymes may account for differences in effects and side effects between users.[15] Because these enzymes are also responsible for metabolizing alcohol there is a strong chance of a dangerous drug interaction.[15][16] Emergency room patients who overdose on both alcohol and 1,4-butanediol often present with symptoms of ethanol intoxication initially and as the ethanol is metabolized the 1,4-butanediol is then able to better compete for the enzyme and a second period of intoxication ensues as the 1,4-butanediol is converted into GHB.[15]

Pharmacodynamics

1,4-Butanediol seems to have two types of pharmacological actions. The major psychoactive effects of 1,4-butanediol are because it is metabolized into GHB; however there is some evidence that 1,4-butanediol may have inherent alcohol-like pharmacological effects that are not due to this conversion.[16]

Legality

While 1,4-butanediol is not currently scheduled federally in the United States, a number of states have classified 1,4-butanediol as a controlled substance. Additionally, individuals have been prosecuted for 1,4-butanediol under the Federal Analog Act as substantially similar to GHB. Scheduling of 1,4-butanediol on a federal level seems unlikely considering its legitimate industrial applications.

2007 contamination of Bindeez toy

See also: Bindeez

A toy called "Bindeez" ("Aqua Dots" in North America) was recalled by the distributor in November 2007 because of the presence of 1,4-butanediol. The toy consists of small beads that stick to each other by sprinkling water. 1,4-Butanediol was detected by GC-MS.[17] The production plant seems to have intended to cut costs by replacing less toxic 1,5-pentanediol with 1,4-butanediol. ChemNet China listed the price of 1,4 butanediol at between about US$1,350–2,800 per metric ton, while the price for 1,5-pentanediol is about US$9,700 per metric ton.[18]

References

  1. ↑ CRC Handbook of Chemistry and Physics, 62nd ed.; Weast, Robert C., Ed.; CRC Press: Boca Raton, FL, 1981; p C-190. ISBN 0-8493-0462-8.
  2. ↑ 2.0 2.1 1,4-Butanediol; International Chemical Safety Card 1104; International Labour Organization: Geneva, March 1999, <http://www.inchem.org/documents/icsc/icsc/eics1104.htm>.
  3. ↑ HSNO Chemical Classification Information Database, <http://www.ermanz.govt.nz/Chemicals/ChemicalDisplay.aspx?SubstanceID=12911> (accessed 29 August 2009), New Zealand Environmental Risk Management Authority.
  4. ↑ Ritch, Emma Genomatica develops novel bioplastic; Cleantech Group, 16 September 2008, <http://www.webcitation.org/5gm6ydrnf>. (accessed 12 May 2009).
  5. ↑ Sahler, Jason Scientists develop plastic-producing bacteria; Inhabit.com, 22 September 2008, <http://www.webcitation.org/5hAFnnoxO>. (accessed 28 May 2009).
  6. ↑ Karas, L.; Piel, W. J. Ethers. In Kirk-Othmer Encyclopedia of Chemical Technology; John Wiley: New York, 2004.
  7. ↑ Zhao, Jing; Hartwig, John F. Acceptorless, neat, ruthenium-catalyzed dehydrogenative cyclization of diols to lactones. Organometallics 2005, 24, 2441–46. DOI: 10.1021/om048983m
  8. ↑ Butanediol (price and demand in market). Chemical Week 12 April 2006, <http://www.accessmylibrary.com/coms2/summary_0286-15012128_ITM>. (accessed 21 November 2008).
  9. ↑ Malaysia: New 1,4-butanediol plant used below capacity. Asian Textile Business April 2004, <http://findarticles.com/p/articles/mi_qa5358/is_200404/ai_n21348316>. (accessed 21 November 2008).
  10. ↑ Satta, Rosalba; Dimitrijevic, Nikola; Manev, Hari Drosophila metabolize 1,4-butanediol into γ-hydroxybutyric acid in vivo. Eur. J. Pharmacol. 2003, 473 (2–3), 149–52. PMID 12892832. DOI: 10.1016/S0014-2999(03)01993-9.
  11. ↑ Carai, Maurio A. M.; Colombo, Giancarlo; Reali, Roberta; Serra, Salvatore; Mocci, Ignazia; Castelli, M. Paola; Cignarella, Giorgio; Gessa, Gian Luigi Central effects of 1,4-butanediol are mediated by GABAB receptors via its conversion into γ-hydroxybutyric acid. Eur. J. Pharmacol. 2002, 441 (3), 157–63. PMID 12063087. DOI: 10.1016/S0014-2999(02)01502-9.
  12. ↑ Itsuoda Nasty Headache: 1,4 BD, GBL & 5-MeO-DiPT; Erowid, 29 November 2003, <http://www.erowid.org/experiences/exp.php?ID=13226>. (accessed 11 August 2009).
  13. ↑ Andro 1,4-Butanediol Toxicity?; Erowid, 19 June 2009, <http://www.erowid.org/experiences/exp.php?ID=1929>. (accessed 11 August 2009).
  14. ↑ Zvosec, Deborah L.; Smith, Stephan W.; McCutcheon, J. Rod; Spillane, Joe; Hall, Bradley J.; Peacock, Elizabeth A. Adverse events, including death, associated with the use of 1,4-butanediol. New Engl. J. Med. 2001, 344 (2), 87–94. PMID 11150358. DOI: 10.1056/NEJM200101113440202.
  15. ↑ 15.0 15.1 15.2 Benzer, Theodore I.; Cameron, Scott; Russi, Christopher Scott Toxicity, Gamma-Hydroxybutyrate; eMedicine, 8 January 2007, <http://www.emedicine.com/emerg/topic848.htm>. (accessed 29 August 2009).
  16. ↑ 16.0 16.1 Poldrugo, Flavio; Snead 1,4 Butanediol, γ-hydroxybutyric acid and ethanol: Relationships and interactions. Neuropharmacology 1984, 59 (23), 109–13. PMID 6717752. DOI: 10.1016/0028-3908(84)90226-0.
  17. ↑ Wang, Linda Industrial Chemical Sullies Popular Children's Toy. Chemical & Engineering News 9 November 2007, <http://pubs.acs.org/cen/news/85/i46/8546news11.html>. (accessed 11 August 2009).
  18. ↑ US mother says her son began to stumble and vomit after eating Chinese-made toy, now recalled; Associated Press, 8 November 2007, <http://news.bostonherald.com/news/national/general/view.bg?articleid=1043462&srvc=next_article>.

External links


Template:GABAergics Template:Neurotransmitters

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