| Identification | More | [Name]
Tiglic acid | [CAS]
80-59-1 | [Synonyms]
2,3-DIMETHYLACRYLIC ACID
2-METHYL-2-BUTENOIC ACID
2-METHYLBUT-2-ENOIC ACID
2-METHYLCROTONIC ACID
2-METHYL-TRANS-2-BUTENOIC ACID
E-2,3-DIMETHYLACRYLIC ACID
(E)-2-METHYL-2-BUTENOIC ACID
FEMA 3599
RARECHEM AL BO 0403
TIGLIC ACID
TRANS-2,3-DIMETHYLACRYLIC ACID
TRANS-2-METHYL-2-BUTENOIC ACID
TRANS-2-METHYLCROTONIC ACID
TRANS-ALPHA,BETA-DIMETHYLACRYLIC ACID
(E)-2-Methyl-2-butensαure
(E)-2-Methylcrotonic acid
(e)-2-methylcrotonicacid
(E)-2-Methylcrotonsαure
(E)-α-Methylcrotonicacid
2-Butenoicacid,2-methyl-,(2E)- | [EINECS(EC#)]
201-295-0 | [Molecular Formula]
C5H8O2 | [MDL Number]
MFCD00066864 | [Molecular Weight]
100.12 | [MOL File]
80-59-1.mol |
| Chemical Properties | Back Directory | [Appearance]
WHITE TO BEIGE CRYSTALLINE POWDER AND CHUNKS | [Melting point ]
61-64 °C(lit.)
| [Boiling point ]
95-96 °C12 mm Hg(lit.)
| [density ]
0.969 g/mL at 25 °C(lit.)
| [FEMA ]
3599 | [refractive index ]
nD81 1.4342 | [Fp ]
101°C | [storage temp. ]
Refrigerator (+4°C) | [solubility ]
Soluble in Chloroform,Dichloromethane,Ethyl Acetate,DMSO,Acetone,etc. | [form ]
Crystalline Powder and Chunks | [pka]
pK (25°) 5.02 | [color ]
White to beige | [Specific Gravity]
0.969 | [Odor]
at 10.00 % in dipropylene glycol. sweet dry spicy woody caramel | [Odor Type]
spicy | [Water Solubility ]
SOLUBLE IN HOT WATER | [JECFA Number]
1205 | [Merck ]
14,9433 | [BRN ]
1236500 | [InChIKey]
UIERETOOQGIECD-ONEGZZNKSA-N | [LogP]
1.35 | [CAS DataBase Reference]
80-59-1(CAS DataBase Reference) | [NIST Chemistry Reference]
2-Butenoic acid, 2-methyl-, (E)-(80-59-1) | [EPA Substance Registry System]
80-59-1(EPA Substance) |
| Safety Data | Back Directory | [Hazard Codes ]
C,Xi | [Risk Statements ]
R34:Causes burns.
R36/37/38:Irritating to eyes, respiratory system and skin . | [Safety Statements ]
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection .
S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) .
S24/25:Avoid contact with skin and eyes .
S27:Take off immediately all contaminated clothing . | [RIDADR ]
UN 3261 8/PG 2
| [WGK Germany ]
2
| [RTECS ]
GQ5430000
| [TSCA ]
Yes | [HazardClass ]
8 | [PackingGroup ]
III | [HS Code ]
29161980 | [Safety Profile]
Low toxicity by
ingestion and skin contact. A severe skin
irritant. When heated to decomposition it
emits acrid smoke and irritating fumes. | [Hazardous Substances Data]
80-59-1(Hazardous Substances Data) |
| Hazard Information | Back Directory | [General Description]
A white lustrous flaked solid with a fruity or spicy odor. About the same density as water and slightly soluble in water. May burn if heated to high temperatures. May severely irritate skin, eyes, lungs or mucous membranes. | [Reactivity Profile]
TIGLIC ACID is a carboxylic acid. Carboxylic acids donate hydrogen ions if a base is present to accept them. They react in this way with all bases, both organic (for example, the amines) and inorganic. Their reactions with bases, called "neutralizations", are accompanied by the evolution of substantial amounts of heat. Neutralization between an acid and a base produces water plus a salt. Carboxylic acids in aqueous solution and liquid or molten carboxylic acids can react with active metals to form gaseous hydrogen and a metal salt. Such reactions occur in principle for solid carboxylic acids as well, but are slow if the solid acid remains dry. Even "insoluble" carboxylic acids may absorb enough water from the air and dissolve sufficiently in TIGLIC ACID, [CORROSIVE SOLID] to corrode or dissolve iron, steel, and aluminum parts and containers. Carboxylic acids, like other acids, react with cyanide salts to generate gaseous hydrogen cyanide. The reaction is slower for dry, solid carboxylic acids. Insoluble carboxylic acids react with solutions of cyanides to cause the release of gaseous hydrogen cyanide. Flammable and/or toxic gases and heat are generated by the reaction of carboxylic acids with diazo compounds, dithiocarbamates, isocyanates, mercaptans, nitrides, and sulfides. Carboxylic acids, especially in aqueous solution, also react with sulfites, nitrites, thiosulfates (to give H2S and SO3), dithionites (SO2), to generate flammable and/or toxic gases and heat. Their reaction with carbonates and bicarbonates generates a harmless gas (carbon dioxide) but still heat. Like other organic compounds, carboxylic acids can be oxidized by strong oxidizing agents and reduced by strong reducing agents. These reactions generate heat. A wide variety of products is possible. Like other acids, carboxylic acids may initiate polymerization reactions; like other acids, they often catalyze (increase the rate of) chemical reactions. | [Air & Water Reactions]
Slightly soluble in water. | [Health Hazard]
TOXIC; inhalation, ingestion or skin contact with material may cause severe injury or death. Contact with molten substance may cause severe burns to skin and eyes. Avoid any skin contact. Effects of contact or inhalation may be delayed. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution. | [Fire Hazard]
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Some are oxidizers and may ignite combustibles (wood, paper, oil, clothing, etc.). Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated. | [Chemical Properties]
trans-2-Methyl-2-butenoic acid has a sweet, warm, spicy odor. | [Chemical Properties]
WHITE TO BEIGE CRYSTALLINE POWDER AND CHUNKS | [Occurrence]
Reported found in celery leaves and stalk, cocoa, mango, dried bonito and Roman chamomile oil | [Uses]
Tiglic acid is the stable isomer of angelic acid. Tiglic acid was found as glyceride in croton oil, as butyl ester in the oil of the Roman camomile, and as geranyl tiglate in oil of geranium. Tiglic a
cid is formed during the charcoaling of maple wood. | [Definition]
ChEBI: A 2-methylbut-2-enoic acid having its double bond in trans-configuration. | [Taste threshold values]
Taste characteristics at 75 ppm: sweet, brown, fruity, with ripe and jamy nuances. | [Synthesis]
Synthesized from 2-hydroxy-2-methylbutyronitrile | [Purification Methods]
Crystallise it from water. It is steam volatile and is soluble in organic solvents. [Beilstein 2 IV 1552.] |
| Questions And Answer | Back Directory | [Description]
Tiglic acid (also (E)-2-Methylbut-2-enoic acid) is an organic acid. It occurs in croton oil, Roman chamomile, and geranium. It can be prepared by dehydration of MEK cyanohydrin, followed by the hydrolysis of the nitrile function. It is either in the form of a thick syrup or colorless crystals. It is with a sweet, warm, spicy odor. It is used to synthesize esters for perfume manufacturing industry and as a raw material to produce acids and esters, which are applied as flavoring agent for food and beverage industry. Tiglic acid is also a useful starting material in the synthesis of pharmaceutical intermediates.
| [References]
[1] H. Panda (2010) Perfumes and Flavours Technology Handbook.
[2] Paul T. Anastas (2009) Handbook of Green Chemistry, Green Catalysis, Biocatalysis.
[3] https://en.wikipedia.org/wiki/Tiglic_acid
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