Acrolein

Source: Wikipedia, the free encyclopedia.
Not to be confused with
Propanal
.
Acrolein
Names
Preferred IUPAC name
Prop-2-enal
Other names
Acraldehyde[1]
Acrylic aldehyde[1]
Allyl aldehyde[1]
Ethylene aldehyde
Acrylaldehyde[1]
Identifiers
3D model (
JSmol
)
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard
 100.003.141 Edit this at Wikidata
EC Number
  • 203-453-4
IUPHAR/BPS
KEGG
RTECS number
  • AS1050000
UNII
UN number 1092
  • InChI=1S/C3H4O/c1-2-3-4/h2-3H,1H2 checkY
    Key: HGINCPLSRVDWNT-UHFFFAOYSA-N checkY
  • InChI=1/C3H4O/c1-2-3-4/h2-3H,1H2
    Key: HGINCPLSRVDWNT-UHFFFAOYAQ
  • O=CC=C
  • C=CC=O
Properties
C3H4O
Molar mass 56.064 g·mol−1
Appearance Colorless to yellow liquid. Colorless gas in smoke.
Odor Acrid, Foul, Irritating
Density 0.839 g/mL
Melting point −88 °C (−126 °F; 185 K)
Boiling point 53 °C (127 °F; 326 K)
Appreciable (> 10%)
Vapor pressure 210 mmHg[1]
Hazards[3]
Occupational safety and health (OHS/OSH):
Main hazards
 Highly poisonous. Causes severe irritation to exposed membranes. Extremely flammable liquid and vapor.
GHS labelling:
GHS02: Flammable GHS05: Corrosive GHS06: Toxic GHS08: Health hazard GHS09: Environmental hazard
Danger
H225, H300, H311, H314, H330, H410
P210, P233, P240, P241, P242, P243, P260, P264, P270, P271, P273, P280, P284, P301+P310, P301+P330+P331, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P310, P312, P320, P321, P322, P330, P361, P363, P370+P378, P391, P403+P233, P403+P235, P405, P501
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 4: Very short exposure could cause death or major residual injury. E.g. VX gasFlammability 3: Liquids and solids that can be ignited under almost all ambient temperature conditions. Flash point between 23 and 38 °C (73 and 100 °F). E.g. gasolineInstability 3: Capable of detonation or explosive decomposition but requires a strong initiating source, must be heated under confinement before initiation, reacts explosively with water, or will detonate if severely shocked. E.g. hydrogen peroxideSpecial hazards (white): no code
4
3
3
Flash point −26 °C (−15 °F; 247 K)
278 °C (532 °F; 551 K)
Explosive limits
 2.8-31%[1]
Lethal dose or concentration (LD, LC):
875 ppm (mouse, 1 min)
175 ppm (mouse, 10 min)
150 ppm (dog, 30 min)
8 ppm (rat, 4 hr)
375 ppm (rat, 10 min)
25.4 ppm (hamster, 4 hr)
131 ppm (rat, 30 min)[2]
674 ppm (cat, 2 hr)[2]
NIOSH (US health exposure limits):
PEL (Permissible)
 TWA 0.1 ppm (0.25 mg/m3)[1]
REL (Recommended)
 TWA 0.1 ppm (0.25 mg/m3) ST 0.3 ppm (0.8 mg/m3)[1]
IDLH
(Immediate danger)
 2 ppm[1]
Safety data sheet (SDS) Sigma-Aldrich SDS
Related compounds
Related alkenals
 Crotonaldehyde

cis-3-Hexenal

(E,E)-2,4-Decadienal

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
checkY verify (what is checkY☒N ?)

Acrolein (systematic name: propenal) is the simplest

propene and mainly used as a biocide and a building block to other chemical compounds, such as the amino acid methionine
.

History

Acrolein was first named and characterized as an aldehyde by the Swedish chemist Jöns Jacob Berzelius in 1839. He had been working with it as a thermal degradation product of glycerol, a material used in the manufacture of soap. The name is a contraction of 'acrid' (referring to its pungent smell) and 'oleum' (referring to its oil-like consistency). In the 20th century, acrolein became an important intermediate for the industrial production of acrylic acid and acrylic plastics.[4]

Production

Acrolein is prepared industrially by oxidation of

heterogeneous catalysts:[5]

CH3CH=CH2 + O2 → CH2=CHCHO + H2O

About 500,000 tons of acrolein are produced in this way annually in North America, Europe, and Japan. Additionally, all acrylic acid is produced via the transient formation of acrolein.

Propane represents a promising but challenging feedstock for the synthesis of acrolein (and acrylic acid).The main challenge is in fact the overoxidation to this acid.

When glycerol (also called glycerin) is heated to 280 °C, it decomposes into acrolein:

(CH2OH)2CHOH → CH2=CHCHO + 2 H2O

This route is attractive when glycerol is co-generated in the production of biodiesel from vegetable oils or animal fats. The dehydration of glycerol has been demonstrated but has not proven competitive with the route from petrochemicals.[6][7]

Niche or laboratory methods

The original industrial route to acrolein, developed by Degussa, involves condensation of formaldehyde and acetaldehyde:

HCHO + CH3CHO → CH2=CHCHO + H2O

Acrolein may also be produced on lab scale by the action of potassium bisulfate on glycerol (glycerine).[8]

Reactions

Acrolein is a relatively

3,4-epoxycyclohexylmethyl-3',4'-epoxycyclohexane carboxylate is also produced from acrolein via the intermediacy of tetrahydrobenzaldehyde
.

Uses

Military uses

Acrolein was used in warfare due to its irritant and blistering properties. The French used the chemical in their hand grenades and artillery shells[9] during World War I under the name "Papite".[10]

Biocide

Acrolein is mainly used as a contact herbicide to control submersed and floating weeds, as well as algae, in irrigation canals. It is used at a level of 10 ppm in irrigation and recirculating waters. In the oil and gas industry, it is used as a biocide in drilling waters, as well as a scavenger for hydrogen sulfide and mercaptans.[5]

Chemical precursor

A number of useful compounds are made from acrolein, exploiting its bifunctionality. The amino acid

methylpyridines.[11] It is also an intermediate in the Skraup synthesis of quinolines
.

Acrolein will polymerize in the presence of oxygen and in water at concentrations above 22%. The color and texture of the polymer depends on the conditions. The polymer is a clear, yellow solid. In water, it will form a hard, porous plastic.[citation needed]

Acrolein has been used as a fixative in preparation of biological specimens for

electron microscopy.[12]

Health risks

Acrolein is toxic and is a strong irritant for the skin, eyes, and nasal passages.[5] The main metabolic pathway for acrolein is the alkylation of glutathione. The WHO suggests a "tolerable oral acrolein intake" of 7.5 μg per day per kg of body weight. Although acrolein occurs in French fries (and other fried foods), the levels are only a few μg per kg.[13] In response to occupational exposures to acrolein, the US Occupational Safety and Health Administration has set a permissible exposure limit at 0.1 ppm (0.25 mg/m3) at an eight-hour time-weighted average.[14] Acrolein acts in an immunosuppressive manner and may promote regulatory cells,[15] thereby preventing the generation of allergies on the one hand, but also increasing the risk of cancer.

Acrolein was identified as one of the chemicals involved in the 2019 Kim Kim River toxic pollution incident.[16]

Cigarette smoke

Connections exist between acrolein gas in the smoke from tobacco cigarettes and the risk of lung cancer.[17] Acrolein is one of seven toxicants in cigarette smoke that are most associated with respiratory tract carcinogenesis.[18] The mechanism of action of acrolein appears to involve induction of increased reactive oxygen species and DNA damage related to oxidative stress.[19]

In terms of the "noncarcinogenic health quotient"[

E-cigarettes, used normally, only generate "negligible" levels of acrolein (less than 10 μg "per puff").[25][26]

Chemotherapy metabolite

Cyclophosphamide and ifosfamide treatment results in the production of acrolein.[27] Acrolein produced during cyclophosphamide treatment collects in the urinary bladder and if untreated can cause hemorrhagic cystitis.

Endogenous production

Acrolein is a component of reuterin.[28] Reuterin can be produced by gut microbes when glycerol is present. Microbe-produced reuterin is a potential resource of acrolein.[29]

Analytical methods

The "acrolein test" is for the presence of

glycerin or fats. A sample is heated with potassium bisulfate, and acrolein is released if the test is positive. When a fat is heated strongly in the presence of a dehydrating agent such as potassium bisulfate (KHSO
4), the glycerol portion of the molecule is dehydrated to form the unsaturated aldehyde, acrolein (CH2=CH–CHO), which has the odor peculiar to burnt cooking grease. More modern methods exist.[13]

In the US, EPA methods 603 and 624.1 are designed to measure acrolein in industrial and municipal wastewater streams.[30][31]

References

  1. ^ a b c d e f g h i NIOSH Pocket Guide to Chemical Hazards. "#0011". National Institute for Occupational Safety and Health (NIOSH).
  2. ^ a b "Acrolein". Immediately Dangerous to Life or Health Concentrations (IDLH). National Institute for Occupational Safety and Health (NIOSH).
  3. ^ "Archived copy". Archived from the original on 2015-04-02. Retrieved 2015-03-26.{{cite web}}: CS1 maint: archived copy as title (link)
  4. ^ Jan F. Stevens and Claudia S. Maier, "Acrolein: Sources, metabolism, and biomolecular interactions relevant to human health and disease", Mol Nutr Food Res. 2008 Jan; 52(1): 7–25.
  5. ^
    ISBN 978-3527306732
    .
  6. doi:10.1002/ejlt.201100047
    .
  7. S2CID 246853148
    .
  8. doi:10.15227/orgsyn.006.0001
    ; Collected Volumes, vol. 1, p. 15.
  9. ^ Prentiss, Augustin Mitchell; Fisher, George J. B. (1937). Chemicals in War: A Treatise on Chemical Warfare. McGraw-Hill Book Company, Incorporated. p. 139. Retrieved 21 November 2021.
  10. ^ Eisler, Ronald (1994). Acrolein Hazards to Fish, Wildlife, and Invertebrates: A Synoptic Review. U.S. Department of the Interior, National Biological Survey. Retrieved 21 November 2021.
  11. ISBN 978-3527306732
    .
  12. ISBN 0-306-47749-1
    .
  13. ^
    PMID 21898908
    .
  14. ^ CDC - NIOSH Pocket Guide to Chemical Hazards
  15. PMID 28332605
    .
  16. ^ Tara Thiagarajan (Mar 15, 2019). "8 Chemicals Have Been Identified in Pasir Gudang's Kim Kim River, Here's What They Are". World of Buzz.
  17. PMID 17030796
    .
  18. PMID 21802474
  19. PMID 18404534
  20. PMID 22352345
    .
  21. PMID 20161525
    .
  22. PMID 26422308
    .
  23. PMID 26726281
    .
  24. S2CID 26116099
    .
  25. ^ McNeill, A, SC (2015). "E - cigarettes: an evidence update A report commissioned by Public Health England" (PDF). www.gov.uk. UK: Public Health England. pp. 76–78. Retrieved 20 August 2015.{{cite web}}: CS1 maint: multiple names: authors list (link)
  26. S2CID 31872198
    .
  27. PMID 10755368
    .
  28. PMID 27819285
    .
  29. PMID 29339426
    .
  30. ^ Appendix A To Part 136 Methods For Organic Chemical Analysis of Municipal and Industrial Wastewater, Method 603—Acrolein And Acrylonitrile>
  31. ^ Method 624.1 — Purgables by GC-MS>
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