Crotonic acid supplier | CasNO.107-93-7

Name
Crotonic acid
EINECS 203-533-9
CAS No. 107-93-7
Article Data173
CAS DataBase
Density 1.027 g/cm³
Solubility 94 g/L (25 °C) in water
Melting Point 72 °C
Formula C₄H₆O₂
Boiling Point 177 °C at 760 mmHg
Molecular Weight 86.0904
Flash Point 81.6 °C
Transport Information UN 2823 8/PG 3
Appearance White to light yellow crystalline flakes
Safety 26-36/37/39-45-61
Risk Codes 21/22-34-50/53-36/37/38
Molecular Structure
Hazard Symbols C,N,Xi
Synonyms 2-Butenoicacid, (E)-;Crotonic acid, (E)- (8CI);(2E)-2-Butenoic acid;(E)-2-Butenoicacid;(E)-Crotonic acid;NSC 8751;trans-2-Butenoic acid;trans-Crotonic acid;
PSA 37.30000
LogP 0.64710

Synthetic route

: 625-38-7
but-3-enoic acid

: 107-93-7
(E)-but-2-enoic acid

Conditions

Conditions	Yield
With palladium diacetate; 1,4-di(diphenylphosphino)-butane at 110℃; for 2h;	99%
Kochen ohne Loesungsmittel oder in Decalin-Loesung;
With hydrogenchloride

: 27819-09-6
2-methyl-2-propenyl (E)-2-butenoate

: 15681-48-8
lithium dimethylcuprate

A: 107-93-7
(E)-but-2-enoic acid

B: 563-46-2
2-Methyl-1-butene

Conditions

Conditions	Yield
In diethyl ether at -10℃; for 2h;	A 96% B n/a

...Expand

: 504-61-0
(E)-but-2-enol

: 107-93-7
(E)-but-2-enoic acid

Conditions

Conditions	Yield
With aluminum oxide; potassium ferrate(VI); copper(II) sulfate In benzene for 0.5h; Ambient temperature;	95%
With ruthenium trichloride; potassium hydroxide; potassium peroxomonosulphate for 3h; Ambient temperature;	24%
With sodium hydroxide; sodium periodate

: 5453-44-1
allyl crotonate

: 107-93-7
(E)-but-2-enoic acid

Conditions

Conditions	Yield
With sodium hydrogen telluride; acetic acid In ethanol for 2h; Heating;	95%

: 201230-82-2
carbon monoxide

: 107-18-6
allyl alcohol

: 107-93-7
(E)-but-2-enoic acid

Conditions

Conditions	Yield
With palladium diacetate; 1,4-di(diphenylphosphino)-butane In benzene at 110℃; under 3750.38 Torr; for 18h; Catalytic behavior; Reagent/catalyst; Solvent; Temperature; Glovebox; Autoclave;	94%

: 3068-88-0, 32082-74-9, 36536-46-6, 65058-82-4
4-methyloxetan-2-one

A: 107-93-7
(E)-but-2-enoic acid

B: 7425-21-0
3-Iodo-n-butanoic acid

Conditions

Conditions	Yield
With hydrogen iodide at 125℃; for 1h;	A n/a B 92%

: 5453-44-1
allyl crotonate

: 15681-48-8
lithium dimethylcuprate

A: 106-98-9
1-butylene

B: 107-93-7
(E)-but-2-enoic acid

Conditions

Conditions	Yield
In diethyl ether at -10℃; for 2h;	A n/a B 89%

...Expand

: 123-73-9
trans-Crotonaldehyde

: 107-93-7
(E)-but-2-enoic acid

Conditions

Conditions	Yield
With quinolinium dichromate(VI) In N,N-dimethyl-formamide at 30℃; for 4h;	85%
With tert.-butylhydroperoxide; copper(l) chloride In acetonitrile at 20℃; for 2h;	81%
With hydrogenchloride; sodium chlorite; sodium dihydrogenphosphate; dihydrogen peroxide In water; acetonitrile at 10℃; for 1h;	53%

: 65946-59-0
(trimethylsilyl)ketene bis(trimethylsilyl) acetal

: 75-07-0
acetaldehyde

: 107-93-7
(E)-but-2-enoic acid

Conditions

Conditions	Yield
With zinc dibromide In tetrahydrofuran for 14h; Ambient temperature;	83.6%

: 1074-12-0
phenylglyoxal hydrate

: 35549-90-7
β-(2-Amino-4-trifluoromethyl)-phenylaminobutansaeure

A: 107-93-7
(E)-but-2-enoic acid

B: 102729-42-0
2-phenyl-7-(trifluoromethyl)quinoxaline

Conditions

Conditions	Yield
at 150 - 160℃; for 3h;	A n/a B 82%

...Expand

: 201230-82-2
carbon monoxide

: 29443-23-0
N,N,N-triethylprop-2-en-1-aminium bromide

: 107-93-7
(E)-but-2-enoic acid

Conditions

Conditions	Yield
With sodium hydroxide; dicobalt octacarbonyl at 65℃; Irradiation;	80%

: 4170-24-5
2-chlorobutanoic acid

A: 187737-37-7
propene

B: 625-38-7
but-3-enoic acid

C: 107-93-7
(E)-but-2-enoic acid

D: 74-84-0
ethane

E: 201230-82-2
carbon monoxide

F: 123-38-6
propionaldehyde

Conditions

Conditions	Yield
With cyclohexene In gas at 319.5℃; Kinetics; Mechanism; Product distribution; ΔE(exct.);	A 1% B n/a C 15% D 5% E n/a F 80%

...Expand

: 532-54-7
oxo-phenyl-acetaldehyde oxime

: 35549-90-7
β-(2-Amino-4-trifluoromethyl)-phenylaminobutansaeure

A: 107-93-7
(E)-but-2-enoic acid

B: 102729-42-0
2-phenyl-7-(trifluoromethyl)quinoxaline

Conditions

Conditions	Yield
at 140℃; for 3h;	A n/a B 77%

...Expand

: 488-16-4
D-erythronic acid

A: 107-93-7
(E)-but-2-enoic acid

B: 7425-21-0
3-Iodo-n-butanoic acid

Conditions

Conditions	Yield
With hydrogen iodide at 125℃; for 4h;	A n/a B 74%

: 15667-21-7
D-erythronolactone

A: 107-93-7
(E)-but-2-enoic acid

B: 7425-21-0
3-Iodo-n-butanoic acid

Conditions

Conditions	Yield
With hydrogen iodide at 125℃; for 1h; other aldonolactones and n-alkanolactones;	A n/a B 71%
With hydrogen iodide at 125℃; for 1h;	A n/a B 71%

: 15384-37-9
D-xylono-1,4-lactone

A: 107-93-7
(E)-but-2-enoic acid

B: 108-29-2
5-methyl-dihydro-furan-2-one

Conditions

Conditions	Yield
With hydrogen iodide for 4h; Heating; Title compound not separated from byproducts;	A n/a B 71%

: 625-68-3, 1951-12-8
3-chlorobutyric acid

A: 187737-37-7
propene

B: 625-38-7
but-3-enoic acid

C: 107-93-7
(E)-but-2-enoic acid

Conditions

Conditions	Yield
With cyclohexene In gas at 350.1℃; Kinetics; Mechanism; Product distribution; ΔE(exct.);	A 63.3% B 9.2% C 27.5%

...Expand

: 201230-82-2
carbon monoxide

: 107-18-6
allyl alcohol

A: 625-38-7
but-3-enoic acid

B: 107-93-7
(E)-but-2-enoic acid

C: 5453-44-1
allyl crotonate

D: allyl-3-butenoate

Conditions

Conditions	Yield
With palladium diacetate; 1,4-di(diphenylphosphino)-butane In tetrahydrofuran at 110℃; under 37503.8 Torr; for 18h; Solvent; Glovebox; Autoclave;	A 30% B 60% C 8% D 8%

...Expand

: 4786-20-3
but-2-enenitrile

A: 1190-76-7
(Z)-2-butenenitrile

B: 107-93-7
(E)-but-2-enoic acid

Conditions

Conditions	Yield
With recombinant nitrilase AtNIT1 from Arabidopsis thailana; Tris*HCl buffer In methanol; water at 20℃; for 24h; pH=8.5;	A 51% B 27%

: 1074-12-0
phenylglyoxal hydrate

: 35549-90-7
β-(2-Amino-4-trifluoromethyl)-phenylaminobutansaeure

A: 107-93-7
(E)-but-2-enoic acid

B: 102729-42-0
2-phenyl-7-(trifluoromethyl)quinoxaline

C: 3-[(2-Amino-4-trifluoromethyl-phenyl)-(1-hydroxy-2-oxo-2-phenyl-ethyl)-amino]-butyric acid

Conditions

Conditions	Yield
In ethanol for 3h; Heating;	A 0.27 g B 24% C 48.6%

...Expand

: 600-30-6
2,3-dibromobutanoic acid

: 107-93-7
(E)-but-2-enoic acid

Conditions

Conditions	Yield
With copper; copper(II) perchlorate In methanol for 8h; Ambient temperature;	36%

: 2648-57-9
3,3-Dichloro-2-butanone

: 124-41-4
sodium methylate

A: 107-93-7
(E)-but-2-enoic acid

B: 10024-70-1, 16510-79-5
3-methoxybutanoic acid

C: 21983-72-2
3,3-dimethoxy-butan-2-one

Conditions

Conditions	Yield
In methanol -78 deg C, then 48 days, roomtemp.;	A 4% B 17% C 20%
Product distribution; -78 deg C, then 48 days, roomtemp.;	A 4% B 17% C 20%

...Expand

: 2028-63-9
but-3-yn-2-ol

A: 187737-37-7
propene

B: 107-93-7
(E)-but-2-enoic acid

C: 513-86-0, 52217-02-4
3-hydroxy-2-butanon

D: 300-85-6, 625-71-8
3-Hydroxybutyric acid

Conditions

Conditions	Yield
With water; ruthenium tetrasulfophthalocyanine at 80℃; for 24h; Product distribution; Further Variations:; Catalysts; anti-Markovnikov hydration;	A n/a B 15% C 2% D 7%

...Expand

: 3068-88-0, 32082-74-9, 36536-46-6, 65058-82-4
4-methyloxetan-2-one

: 107-93-7
(E)-but-2-enoic acid

Conditions

Conditions	Yield
With copper diacetate; potassium carbonate und Behandeln des erhaltenen Polyesters mit ueberhittem Wasserdampf;
With 18-crown-6 ether; potassium naphthalenide; Lewatit S 1080 1) THF, 20 deg C, 10 min, 2) Et2O; Yield given. Multistep reaction;
With H-ZSM-5 at 210℃; under 1251.35 Torr; Pressure; Reagent/catalyst; Temperature; Inert atmosphere; Flow reactor;

: 105-57-7
diethyl acetal

: 141-82-2
malonic acid

: 107-93-7
(E)-but-2-enoic acid

Conditions

Conditions	Yield
With piperidine; pyridine

: 123-73-9
trans-Crotonaldehyde

: 638-38-0, 993-02-2, 2180-18-9, 15411-95-7, 22981-23-3, 27004-39-3
manganese(II) acetate

: 107-93-7
(E)-but-2-enoic acid

Conditions

Conditions	Yield
With potassium permanganate; oxygen; acetic acid

: 625-38-7
but-3-enoic acid

A: 107-93-7
(E)-but-2-enoic acid

B: 300-85-6, 625-71-8
3-Hydroxybutyric acid

Conditions

Conditions	Yield
With sodium hydroxide inactive β-oxy-butyric acid;

: 64-17-5
ethanol

: 503-64-0
(Z)-but-2-enoic acid

: 107-93-7
(E)-but-2-enoic acid

Conditions

Conditions	Yield
Rate constant; Isomerisierung;

: 590-15-8
trans-2-propenyl bromide

: 107-93-7
(E)-but-2-enoic acid

Conditions

Conditions	Yield
With diethyl ether; lithium und jeweils anschliessend mit Kohlendioxid;
With tetrahydrofuran; magnesium und jeweils anschliessend mit Kohlendioxid;

: 107-93-7
(E)-but-2-enoic acid

: 2623-86-1
3-bromobutyric acid

Conditions

Conditions	Yield
With hydrogen bromide In acetic acid at 25℃; for 1h; Irradiation;	100%
With hydrogen bromide at 20℃; for 20h;	90%
With water; hydrogen bromide mit oder ohne Zusatz von Peroxyden;

: 107-93-7
(E)-but-2-enoic acid

: 63995-70-0
trisodium tris(3-sulfophenyl)phosphine

: 115524-91-9
C22H18O11PS3(3-)*3Na(1+)

Conditions

Conditions	Yield
In water at 50℃;	100%

: 107-93-7
(E)-but-2-enoic acid

: 63995-70-0
trisodium tris(3-sulfophenyl)phosphine

: 115524-92-0
C22H17(2)HO11PS3(3-)*3Na(1+)

Conditions

Conditions	Yield
With water-d2 at 50℃;	100%

: 107-93-7
(E)-but-2-enoic acid

: 275815-80-0
(S)-3-(4-fluorobenzyl)-piperidine

: 382637-74-3
(3S)-1-[(2E)-2-butenoyl]-3-(4-fluorobenzyl)piperidine

Conditions

Conditions	Yield
With benzotriazol-1-yloxyl-tris-(pyrrolidino)-phosphonium hexafluorophosphate; triethylamine In dichloromethane at 20℃; for 24h;	100%
With benzotriazol-1-yloxyl-tris-(pyrrolidino)-phosphonium hexafluorophosphate; triethylamine at 0℃; for 20h;

: 107-93-7
(E)-but-2-enoic acid

: 120279-20-1
(RS)-3-(2-mercaptothiophene)butanoic acid

Conditions

Conditions	Yield
Stage #1: 2-bromothiophene With hydrogenchloride; iodine; magnesium; triethylamine In tetrahydrofuran for 2h; Heating / reflux; Stage #2: With sulfur In tetrahydrofuran at 45 - 50℃; for 2h; Stage #3: (E)-but-2-enoic acid With hydrogenchloride; triethylamine hydrochloride; triethylamine more than 3 stages;	100%
Stage #1: 2-bromothiophene With magnesium; iodine In tetrahydrofuran for 2h; Heating / reflux; Stage #2: With sulfur In tetrahydrofuran at 45 - 50℃; for 2h; Stage #3: (E)-but-2-enoic acid With triethylamine hydrochloride; triethylamine more than 3 stages;	100%

: 107-93-7
(E)-but-2-enoic acid

: 6-amino-1,3-diethylquinazoline-2,4(1H,3H)-dione

: (E)-N-(1,3-diethyl-2,4-dioxo-1,2,3,4-tetrahydroquinazolin-6-yl)but-2-enamide

Conditions

Conditions	Yield
With triethylamine; N-[(dimethylamino)-3-oxo-1H-1,2,3-triazolo[4,5-b]pyridin-1-yl-methylene]-N-methylmethanaminium hexafluorophosphate In N,N-dimethyl-formamide at 50℃;	100%

: 107-93-7
(E)-but-2-enoic acid

: (R)-5-(2-methyl-4-phenoxyphenyl)-4-oxo-N-(piperidin-3-yl)-4,5-dihydro-3H-1-thia-3,5,8-triazaacenaphthylene-2-carboxamide

: (R,E)-N-(1-(but-2-enoyl)piperidin-3-yl)-5-(2-methyl-4-phenoxyphenyl)-4-oxo-4,5-dihydro-3H-1-thia-3,5,8-triazaacenaphthylene-2-carboxamide

Conditions

Conditions	Yield
With triethylamine; N-[(dimethylamino)-3-oxo-1H-1,2,3-triazolo[4,5-b]pyridin-1-yl-methylene]-N-methylmethanaminium hexafluorophosphate In N,N-dimethyl-formamide at 20℃; for 4h; Inert atmosphere;	100%
With triethylamine; N-[(dimethylamino)-3-oxo-1H-1,2,3-triazolo[4,5-b]pyridin-1-yl-methylene]-N-methylmethanaminium hexafluorophosphate In N,N-dimethyl-formamide at 20℃; for 4h;	100%

: 107-93-7
(E)-but-2-enoic acid

: 17342-77-7
crotonic acid sodium salt

Conditions

Conditions	Yield
With sodium hydroxide In water	99.6%

: 107-93-7
(E)-but-2-enoic acid

: 100-39-0
benzyl bromide

: 71338-71-1
benzyl (E)-2-butenoate

Conditions

Conditions	Yield
With potassium carbonate In N,N-dimethyl-formamide at 20℃; for 18.3333h; Inert atmosphere; Cooling with ice;	99.4%
With potassium carbonate In N,N-dimethyl-formamide at 20℃; for 18.33h;	99.4%
With potassium carbonate In N,N-dimethyl-formamide at 20℃; for 18h; Cooling with ice; Inert atmosphere;	99.4%

: 29943-42-8
Tetrahydro-4H-pyran-4-one

: 61-54-1
tryptamine

: 107-93-7
(E)-but-2-enoic acid

: 119072-55-8, 7188-38-7
tert-butylisonitrile

: 4-{but-2-enoyl-[2-(1H-indol-3-yl)ethyl]amino}tetrahydropyran-4-carboxylic acid tert-butylamide

Conditions

Conditions	Yield
In methanol at 20℃; for 18h; Ugi reaction;	99%

...Expand

: 1445-73-4
1-Methyl-4-piperidone

: 61-54-1
tryptamine

: 107-93-7
(E)-but-2-enoic acid

: 119072-55-8, 7188-38-7
tert-butylisonitrile

: 4-{(but-2-enoyl)-[2-(1H-indole-3-yl)ethyl]amino}-1-methylpiperidine-4-carboxylic acid tert-butylamide

Conditions

Conditions	Yield
In methanol at 20℃; for 18h; Ugi reaction;	99%

...Expand

: 103977-75-9
p-trifluoromethyl cinnamyl chloride

: 107-93-7
(E)-but-2-enoic acid

: (E)-(-)-1-(4-trifluoromethylphenyl)allyl but-2-enoate

Conditions

Conditions	Yield
With C32H40N2O2PRu(1+)*F6P(1-); sodium carbonate In tetrahydrofuran at 25℃; for 4h; Inert atmosphere; optical yield given as %ee; enantioselective reaction;	99%

: 107-93-7
(E)-but-2-enoic acid

: 352616-24-1
C11H11ClO2

: (E)-(-)-methyl 4-(1-(but-2-enyloxy)allyl)benzoate

Conditions

Conditions	Yield
With C32H40N2O2PRu(1+)*F6P(1-); sodium carbonate In tetrahydrofuran at 25℃; for 4h; Inert atmosphere; optical yield given as %ee; enantioselective reaction;	99%

: 107-93-7
(E)-but-2-enoic acid

: 2464-98-4
1-(3-chloro-1-propen-1-yl)naphthalene

: (E)-(-)-1-(naphthalene-1-yl)allyl but-2-enoate

Conditions

Conditions	Yield
With C32H40N2O2PRu(1+)*F6P(1-); sodium carbonate In tetrahydrofuran at 25℃; for 4h; Inert atmosphere; optical yield given as %ee; enantioselective reaction;	99%

: 107-93-7
(E)-but-2-enoic acid

: 1-bromo-4-(3-chloro-propenyl)benzene

: (E)-(-)-1-(4-bromophenyl)allyl but-2-enoate

Conditions

Conditions	Yield
With C32H40N2O2PRu(1+)*F6P(1-); sodium carbonate In tetrahydrofuran at 25℃; for 4h; Inert atmosphere; optical yield given as %ee; enantioselective reaction;	99%

: 107-93-7
(E)-but-2-enoic acid

: 77485-20-2
trans-potassium crotonate

Conditions

Conditions	Yield
With potassium hydroxide In water at 20 - 52℃; under 760.051 Torr; pH=7.1 - 7.25;	99%

: 107-93-7
(E)-but-2-enoic acid

: 13991-36-1
4-bromocrotonic acid

Conditions

Conditions	Yield
With N-Bromosuccinimide; 2,2'-azobis(isobutyronitrile) In tetrachloromethane Reflux;	98%
With N-Bromosuccinimide; dibenzoyl peroxide In tetrachloromethane at 77℃; for 4h;	93%
With N-Bromosuccinimide; 2,2'-azobis(isobutyronitrile) In benzene at 84℃; for 2.5h;	91.3%

: 107-93-7
(E)-but-2-enoic acid

: 38986-88-8
crotonoyl fluoride

Conditions

Conditions	Yield
With sulfur tetrafluoride at 20℃; for 1.5h; autoclave;	98%
With N-ethyl-N,N-diisopropylamine; (bis-(2-methoxyethyl)amino)sulfur trufluoride In dichloromethane at 0℃;

: 107-93-7
(E)-but-2-enoic acid

: 1464-69-3
2-(vinyloxy)ethyl methacrylate

: 1-[2-(methacryloyloxy)ethoxy]ethyl (E)-2-butenoate

Conditions

Conditions	Yield
With trifluoroacetic acid In 1,2-dimethoxyethane at 60℃; for 1h;	98%

: 107-93-7
(E)-but-2-enoic acid

: 2687-12-9
cinnamyl chloride

: (E)-1-phenylallyl but-2-enoate

Conditions

Conditions	Yield
With C28H32N2O2PRu(1+)*F6P(1-); sodium carbonate In tetrahydrofuran at 25℃; for 4h; Inert atmosphere; regioselective reaction;	98%

: 107-93-7
(E)-but-2-enoic acid

: 108-98-5
thiophenol

: 880-13-7
2-hydroxycarbonyl-1-methylethyl phenyl sulfide

Conditions

Conditions	Yield
With iodine at 50℃; for 2.5h; Michael reaction;	97%
With piperidine
With triethylamine In tetrahydrofuran at 0 - 20℃;
With N-ethyl-N,N-diisopropylamine In N,N-dimethyl-formamide at 60℃; for 48h; Addition;

: 107-93-7
(E)-but-2-enoic acid

: 591-87-7
Allyl acetate

: 5453-44-1
allyl crotonate

Conditions

Conditions	Yield
With [Ir(1,5-cyclooctadiene)2]PF6 In toluene at 100℃; for 5h;	97%

: 136-95-8
2-amino-benzthiazole

: 107-93-7
(E)-but-2-enoic acid

: 530-62-1
1,1'-carbonyldiimidazole

: 1038740-96-3
C14H14N4OS

Conditions

Conditions	Yield
Stage #1: (E)-but-2-enoic acid; 1,1'-carbonyldiimidazole In N,N-dimethyl-formamide at 70℃; for 2h; Stage #2: 2-amino-benzthiazole In N,N-dimethyl-formamide at 100℃; for 6h; Further stages.;	97%

...Expand

: 107-93-7
(E)-but-2-enoic acid

: 3277-26-7
1,1,3,3-Tetramethyldisiloxane

: 10038-98-9
germaniumtetrachloride

: 21187-26-8
3-(trichlorogermyl)butanoic acid

Conditions

Conditions	Yield
In neat (no solvent) mixt. kept 12 days at 20°C (acid completely dissolved after 1 day, pptn. begins after 3 days); pptn., liquid layer sepd. by decantation, crystals recrystn. (hexane);	97%

...Expand

: 107-93-7
(E)-but-2-enoic acid

: 1135592-61-8
C11H13ClO

: (E)-(-)-1-(benzyloxy)but-3-en-2-yl but-2-enoate

Conditions

Conditions	Yield
With C32H40N2O2PRu(1+)*F6P(1-); sodium carbonate In tetrahydrofuran at 25℃; for 4h; Inert atmosphere; optical yield given as %ee; enantioselective reaction;	97%

: 107-93-7
(E)-but-2-enoic acid

: 2687-12-9
cinnamyl chloride

: (E)-(-)-1-phenylallyl but-2-enoate

Conditions

Conditions	Yield
With C32H40N2O2PRu(1+)*F6P(1-); sodium carbonate In tetrahydrofuran at 25℃; for 4h; Inert atmosphere; optical yield given as %ee; enantioselective reaction;	97%

: 107-93-7
(E)-but-2-enoic acid

: 75-09-2
dichloromethane

: methylidene dicrotonate

Conditions

Conditions	Yield
With potassium carbonate In dimethyl sulfoxide at 130℃; for 5h;	97%

: 107-93-7
(E)-but-2-enoic acid

: 162252-06-4
(2R)-2-benzyl-2-fluoro-3-(p-methoxybenzyloxy)-1-propanol

: 162252-09-7
(E)-But-2-enoic acid (S)-2-fluoro-2-(4-methoxy-benzyloxymethyl)-3-phenyl-propyl ester

Conditions

Conditions	Yield
With dmap; dicyclohexyl-carbodiimide	96%

Crotonic acid Consensus Reports

Reported in EPA TSCA Inventory.

Crotonic acid Standards and Recommendations

DOT Classification: 8; Label: Corrosive

Crotonic acid Specification

The CAS registry number of Crotonic acid is 107-93-7. Its EINECS registry number is 203-533-9. It is a short-chain unsaturated carboxylic acid. In addition, the molecular formula is C₄H₆O₂. It crystallizes as needles from hot water. Besides, it should be stored in a cool, ventilated place. The storage place must stay away from oxidant, the fire and heat source.

Physical properties about this chemical are: (1)ACD/LogP: 0.80; (2)ACD/LogD (pH 5.5): 0.02; (3)ACD/LogD (pH 7.4): -1.77; (4)ACD/BCF (pH 5.5): 1; (5)ACD/BCF (pH 7.4): 1; (6)ACD/KOC (pH 5.5): 10.86; (7)ACD/KOC (pH 7.4): 1; (8)#H bond acceptors: 2; (9)#H bond donors: 1; (10)#Freely Rotating Bonds: 1; (11)Polar Surface Area: 26.3 Å²; (12)Index of Refraction: 1.448; (13)Molar Refractivity: 22.2 cm³; (14)Molar Volume: 82.8 cm³; (15)Polarizability: 8.8×10^-24cm³; (16)Surface Tension: 34.2 dyne/cm; (17)Density: 1.039 g/cm³; (18)Flash Point: 81.6 °C; (19)Enthalpy of Vaporization: 45.57 kJ/mol; (20)Boiling Point: 177 °C at 760 mmHg; (21)Vapour Pressure: 0.505 mmHg at 25°C.

Preparation of Crotonic acid: it can be prepared by but-2-enal. This reaction will need reagent (bipy)H₂CrOCl₅ and solvent CH₂Cl₂. The reaction time is 0.5 hour at reaction temperature of 28-30 °C. The yield is about 90%.

Crotonic acid can be prepared by but-2-enal

Uses of Crotonic acid: it can be used as a monomer to synthesize polymer. In addition, it can be used to get 2,3-dideuterio-butyric acid. This reaction will need reagent D₂, catalyst 5 percent Pd/C and solvent aq. ethanol. The yield is about 86% with ambient temperature and reaction pressure of 760 Pa.

Crotonic acid can be used to get 2,3-dideuterio-butyric acid.

When you are using this chemical, please be cautious about it as the following:
This chemical is harmful in contact with skin and if swallowed. It is irritating to eyes, respiratory system and skin. In addition, it can cause burns. Moreover, it is very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. During using it, wear suitable protective clothing, gloves and eye/face protection. In case of contacting with eyes, rinse immediately with plenty of water and seek medical advice. And in case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.). In addition, you should avoid releasing to the environment and you can refer to special instructions safety data sheet.

You can still convert the following datas into molecular structure:
(1)SMILES: O=C(O)/C=C/C
(2)InChI: InChI=1/C4H6O2/c1-2-3-4(5)6/h2-3H,1H3,(H,5,6)/b3-2+
(3)InChIKey: LDHQCZJRKDOVOX-NSCUHMNNBH

Product Name

Crotonic acid

Synthetic route

Crotonic acid Consensus Reports

Crotonic acid Standards and Recommendations

Crotonic acid Specification

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