| Identification | More | [Name]
Coumarin | [CAS]
91-64-5 | [Synonyms]
1,2-BENZOPYRONE
1-BENZOPYRAN-2-ONE
2H-1-BENZOPYAN-2-ONE
2H-1-BENZOPYRAN-2-ONE
5,6-BENZO-2-PYRONE
AKOS 212-75
CHROMEN-2-ONE
CIS-O-COUMARINIC ACID LACTONE
COUMARIN
COUMARIN, CHINESE
COUMARINIC ANHYDRIDE
CUMARIN
O-HYDROXYCINNAMIC ACID LACTONE
TIMTEC-BB SBB000094
TONKA BEAN CAMPHOR
2H-1-Benzopyran, 2-oxo-
2h-benzo(b)pyran-2-one
2H-Benzo[b]pyran-2-one
2H-Chromen-2-one
2-Oxo-1,2-benzopyran | [EINECS(EC#)]
202-086-7 | [Molecular Formula]
C9H6O2 | [MDL Number]
MFCD00006850 | [Molecular Weight]
146.14 | [MOL File]
91-64-5.mol |
| Chemical Properties | Back Directory | [Appearance]
WHITE CRYSTALS OR CRYSTALLINE POWDER | [Melting point ]
68-73 °C(lit.)
| [Boiling point ]
298 °C(lit.)
| [density ]
0.935 | [vapor pressure ]
0.01 mm Hg ( 47 °C)
| [refractive index ]
1.5100 (estimate) | [Fp ]
162 °C
| [storage temp. ]
Refrigerator | [solubility ]
1.7g/l | [form ]
Crystals or Crystalline Powder | [color ]
White | [Odor]
at 10.00 % in dipropylene glycol. sweet hay tonka new mown hay | [PH Range]
Non' uorescence (9.5) to light green ' uorescence (10.5) | [Odor Type]
tonka | [Water Solubility ]
1.7 g/L (20 ºC) | [λmax]
275nm | [Detection Methods]
HPLC | [Merck ]
14,2562 | [BRN ]
383644 | [Major Application]
color filter, organic electroluminescent devices, liquid crystal displays, field emission displays, inks, nickel plating, detergents, deodorant for shoes, petroleum products, cigarettes, personal care products, cosmetics, sunscreen cream, perfumes, nucleic acid sequencing, antiinflammatory agent, treatment of cancer, neurotransmission disorders, bleeding disorders, cerebrovascular disease, thrombosis, hemorrhoids, rheumatic disease, arthritic disease, epilepsy, vaginitis, painkiller, teeth whitening agent, skin whitening agent, wound healing promoter | [Contact allergens]
Coumarin is an aromatic lactone naturally occurring in Tonka beans and other plants. As a fragrance allergen, it has to be mentioned by name in cosmetics within the EU | [InChIKey]
ZYGHJZDHTFUPRJ-UHFFFAOYSA-N | [LogP]
1.39 at 25℃ | [Uses]
coumarin is considered a blood thinner, it can also increase blood flow. Some sources cite anti-oxidant capacities, as well. It is a specific plant constituent and is what creates the fragrance of freshly mowed hay. Coumarin is found in such plants as cherries, lavender, licorice, and sweet clover. | [CAS DataBase Reference]
91-64-5(CAS DataBase Reference) | [IARC]
3 (Vol. Sup 7, 77) 2000 | [NIST Chemistry Reference]
Coumarin(91-64-5) | [EPA Substance Registry System]
91-64-5(EPA Substance) |
| Hazard Information | Back Directory | [Definition]
ChEBI: A chromenone having the keto group located at the 2-position. | [General Description]
Colorless crystals, flakes or colorless to white powder with a pleasant fragrant vanilla odor and a bitter aromatic burning taste. | [Reactivity Profile]
COUMARIN(91-64-5) is sensitive to exposure to light. COUMARIN(91-64-5) is also sensitive to heat. This chemical is incompatible with strong acids, strong bases and oxidizers. COUMARIN(91-64-5) is hydrolyzed by hot concentrated alkalis. COUMARIN(91-64-5) can be halogenated, nitrated and hydrogenated (in the presence of catalysts). | [Air & Water Reactions]
Insoluble in water. | [Hazard]
Toxic by ingestion; carcinogenic. Use in
food products prohibited (FDA). Questionable carcinogen. | [Health Hazard]
SYMPTOMS: Exposure to this compound may cause narcosis. It may also cause irritation and liver damage. | [Fire Hazard]
This chemical is combustible. | [Description]
Coumarin is a naturally occurring Benzopyrone compound.
It is found in a large number of plants belonging to many
different families including tonka beans, woodruff, lavender
oil, cassia, melilot (sweet clover), and other plants. It is found
in edible plants such as strawberries, cinnamon, peppermint,
green tea, carrots, and celery, as well as in partially fermented
tea, red wine, beer, and other foodstuffs. Concentrations range
from 87 000 ppm in cassia and 40 000 ppm in cinnamon to
20 ppm in peppermint and 5 ppb in tangerines. | [Occurrence]
Found in many plants and essential oils such as cassia, melilot, orchid, lavender and balsam of Peru (Sp?th, 1937; Gildemeister & Hoffman, 1966). | [Preparation]
Coumarin is currently produced by Perkin synthesis from salicylaldehyde.
In the presence of sodium acetate, salicylaldehyde reacts with acetic
anhydride to produce coumarin and acetic acid. The reaction is carried out in the
liquid phase at elevated temperature.
A process for the production of coumarin from hexahydrocoumarin by dehydrogenation has also been elaborated.
Since the odor of coumarin is relatively weak, strong-smelling by-products (e.g.,
vinylphenol) must be removed. Many purification methods have been reported
and patented. | [Aroma threshold values]
Detection at 34 to 50 ppb; recognition, 250 ppb | [Synthesis Reference(s)]
The Journal of Organic Chemistry, 27, p. 4704, 1962 DOI: 10.1021/jo01059a541
Tetrahedron Letters, 27, p. 3911, 1986 DOI: 10.1016/S0040-4039(00)83914-3 | [Flammability and Explosibility]
Nonflammable | [Biological Activity]
Oral anticoagulants can be prepared from compounds with coumarin as a base. Coumarin has been known for well over a century and, in addition to its use pharmaceutically, it is also an excellent odor-enhancing agent. However, because of its toxicity, it is not permitted in food products in the United States (Food and Drug Administration). One commercial drug is 3-(alpha-acetonyl-4-nitrobenzyl)- 4-hydroxycoumarin. This drug reduces the concentration of prothrombin in the blood and increases the prothrombin time by inhibiting the formation of prothrombin in the liver. The drug also interferes with the production of factors VII, IX, and X, so that their concentration in the blood is lowered during therapy. The inhibition of prothrombin involves interference with the action of vitamin K, and it has been postulated that the drug competes with vitamin K for an enzyme essential for prothrombin synthesis. Another commercial drug is bis-hydroxy-coumarin, C19H12O6. The actions of this drug are similar to those just described. | [Synthesis]
May be extracted from tonka beans; from salicylaldehyde and acetic anhydride in the presence of sodium acetate; also
from o-cresol and carbonyl chloride followed by chlorination of the carbonate and fusion with a mixture of alkali acetate, acetic
anhydride and a catalyst. | [Environmental Fate]
Coumarin toxicity is a function of blood and target tissue levels
of coumarin relative to the metabolic capacity of the target
organ. Cellular toxicity results when the formation of the toxic
moieties exceeds the capacity of the cell to detoxify. This can
have significant impact when comparing dosing by gavage to
dietary exposure. | [storage]
Store at -20°C | [Purification Methods]
Coumarin crystallises from ethanol or water and sublimes in vacuo at 43o [Srinivasan & deLevie J Phys Chem 91 2904 1987]. [Beilstein 17/10 V 143.] | [Toxicity evaluation]
Coumarin is readily biodegradable. Coumarin is unlikely to
bind to soil. Coumarin does not bioaccumulate; the bioconcentration
factor has been determined to be <10–40.
Various environmental fate studies have shown that coumarin
in the environment would biodegrade and be lost to volatilization.
Losses resulting from photolysis may also occur. |
| Safety Data | Back Directory | [Hazard Codes ]
Xn | [Risk Statements ]
R22:Harmful if swallowed.
R40:Limited evidence of a carcinogenic effect.
R36/37/38:Irritating to eyes, respiratory system and skin .
R20/21/22:Harmful by inhalation, in contact with skin and if swallowed .
R43:May cause sensitization by skin contact. | [Safety Statements ]
S36:Wear suitable protective clothing .
S36/37:Wear suitable protective clothing and gloves .
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice . | [RIDADR ]
UN 2811 6.1/PG 3
| [WGK Germany ]
1
| [RTECS ]
GN4200000
| [TSCA ]
Yes | [HazardClass ]
6.1 | [PackingGroup ]
III | [HS Code ]
29322000 | [Safety Profile]
Poison by ingestion,
intraperitoneal, and subcutaneous routes.
Questionable carcinogen with experimental
tumorigenic data. Experimental teratogenic
effects. Mutation data reported.
Combustible when exposed to heat or
flame. When heated to decomposition it
emits acrid smoke and fumes. See also
KETONES and ANHYDRIDES. | [Hazardous Substances Data]
91-64-5(Hazardous Substances Data) | [Toxicity]
LD50 orally in rats, guinea pigs: 680, 202 mg/kg (Jenner) |
| Questions And Answer | Back Directory | [Brief Introduction]
It is also known as 1, 2-benzopyrone, cis ortho-caberillin, o-hydroxy cinnamon lactone and coumarin. It is contained in many natural plants in the form of glycosides and esters as vanillin instead of free-form. Coumarin will come out when certain plants are fermented and processed. Coumarin is found in the seeds of Dayton beans (Riccinechoides) in 1820 and is widely distributed in the plant kingdom, especially in plant species including Umbelliferae, Soybean, Rutaceae and Calyx. Seeds contain about 1.5% of the coumarin. In addition, coumarin is also contained in lavender oil, cinnamon oil and Peru balsam. Coumarin is spicy with sweet and lemongrass aroma. The aroma is emitted from the pink gum in the leaves of the fragrant beans, and the gum is made from the breakdown of the coumarin glycosides in the leaves. The aroma emitted by Sweet alfalfa is actually from the release of coumarin due to fermentation and decomposition during the stacking process. Precipitate from the ether appears as orthorhombic white pyramid or oblique sheet-like crystals with Lemongrass-type smell. It can subject to sublimation. | [Chemical Properties]
Golden crystalline solid (fronds or rhomboid); it is sweet with black beans-like aroma, dried herbs aroma and fennel aroma. After dilution, it smells like dried straw, nuts and tobacco. It is insoluble in cold water but soluble in hot water, ethanol and chloroform, easily soluble in ether and benzene. The solubility in 100ml of water at 25 ℃ is only 0.01g; 13 7g in 100ml of ethanol at 16 ℃; 1g in 50 mL 100℃ hot water. Oral LD50: 680mg / kg for rat.
| [Uses]
used as a spice for the preparation of floral fragrances such as lavender, rosemary and rosemary, used in perfumes, cosmetics, soaps and detergents; used as flavoring agents for blending fragrances to make the aroma be lasting and unchanged; used as an electroplating additive to prevent the occurrence of pores in coating and can increase the brightness; as the flavor enhancer of printing ink and plastic; formerly used as spices and cigarettes spices, banned from 197; Since then, China had also prohibited it application in food; used as pharmaceutical raw materials.
Coumarin, as a laser dye, has an output laser range be within the blue-green region (420 ~ 570nm), has high fluorescence quantum efficiency, such as 7-ethylamino-6-methyl-4-trifluoromethyl coumarin Lactone 307), the structure is as follows:
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