2-butenoic acid
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IUPAC name :but-2-enoic acid
InChI :InChI=1/C4H6O2/c1-2-3-4(5)6/h2-3H,1H3,(H,5,6)
InChIKey :LDHQCZJRKDOVOX-UHFFFAOYAC
SMILES :CC=CC(=O)O
cas number :3724-65-0
(EINECS) number :223-077-4
beilstein number :1098434
fema number :3908
coe number :10080
fl. number :08.072
molar refractivity :22.20 ± 0.3 cm3
parachor :200.2 ± 4.0 cm3
index of refraction :1.448 ± 0.02
surface tension :34.2 ± 3.0 dyne/cm
density :1.039 ± 0.06 g/cm3
polarizability :8.80 ± 0.5 10-24cm3
XlogP : 0.70
XlogP3 : 0.70
molecular weight : 86.0892400 (IUPAC)
formula :C4 H6 O2
NMR Predictor :Predict
 
 
export tariff code :unspecified
fda reg :175.105
175.350
176.170
176.180

Suppliers :
Frutarom :2-BUTENOIC ACID (CROTONIC ACID)
≥99.00%, NI, Kosher
Odor:  Roast, Burnt
Suggested Uses: Bread, Coffee, Tropical Fruits
Godavari :Crotonic Acid
99%
Inoue :CROTONIC ACID
Nanjing :crotonic acid
orders in chinese only.
Penta :crotonic acid
Pfaltz & Bauer :Crotonic acid
99%

organoleptics :
odor type :burnt
odor strength :high ,
recommend smelling in a 0.10 % solution or less
odor description:
at 0.10 % in propylene glycol.  
roasted burnt

properties :
appearence :white solid
assay : 99.00 to 100.00 %   sum of isomers
Food Chemicals Codex Listed :No
melting point : 71.00 to 73.00 °C. @ 760.00 mm Hg
boiling point : 184.00 to 185.00 °C. @ 760.00 mm Hg
boiling point : 66.00 to 67.00 °C. @ 10.00 mm Hg
vapor density :2.9 ( Air = 1 )
flash point : 186.00  °F.  TCC  ( 85.56 °C. )
logP (o/w) : 0.72

safety :
most important hazard(s) :Xn - Harmful.
  R 20/21/22 - Harmful by inhalation, in contact with skin and if swallowed.
R 34 - Causes burns.
S 02 - Keep out of the reach of children.
S 26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S 27 - Take off immediately all contaminated clothing.
S 28 - After contact with skin, wash immediately with plenty of water.
S 36/37/39 - Wear suitable clothing, gloves and eye/face protection.
Oral Toxicity(LD50) : 
  Oral-Rat    1000.00  mg/kg
Journal of Industrial Hygiene and Toxicology. Vol. 26, Pg. 269, 1944.

Oral-Mouse    4800.00  mg/kg
Biochemical Journal. Vol. 34, Pg. 1196, 1940.

Intraperitoneal-Mouse    25.00  mg/kg

Dermal Toxicity(LD50) : 
  Skin-Rabbit  600.00  mg/kg
Journal of Industrial Hygiene and Toxicology. Vol. 26, Pg. 269, 1944.

Subcutaneous-Mouse  3590.00  mg/kg
Journal of Pharmacy and Pharmacology. Vol. 21, Pg. 85, 1969.

Skin-Guineapig  200.00  mg/kg

Inhalation Toxicity(LC50) : 
  Not determined
 

safety in use :
Category :flavoring agents
 
recommendation for 2-butenoic acid fragrance usage levels up to :
 not for fragrance use.

safety references :
EPI System :view
NIOSH International Chemical Safety Cards :search
NLM Hazardous Substances Data Bank :search
Env. Mutagen Info. Center :Search
Canada Domestic Sub. List :Yes
EPA Chem. Sub. Inventory : Yes
WISER :UN 2823
 
WGK Germany :3
 
 
 
 
but-2-enoic acid
(EINECS) number :223-077-4
RTECS :3724-65-0
chemidplus :003724650
EPA/NOAA CAMEO :hazardous materials
EPA Substance Registry Services :3724-65-0

references :
 
but-2-enoic acid
fl. number :08.072
NIST Chemistry WebBook :3016727019
pubchem :10520625

Cosmetics :
Cosmetic uses : masking agents
stabilising agents

other :
CosIng :cosmetic data
VCF-Online: VCF Volatile Compounds in Food
FDA Everything Added to Food in the United States (EAFUS)View
synonyms :
 but-2-enoic acid
2-butenoic acid
alpha-butenoic acid
 crotonic acid
alpha-crotonic acid
beta-methacrylic acid
3-methyl acrylic acid
beta-methyl acrylic acid
3-methylacrylic acid
beta-methylacrylic acid

soluble in :
 alcohol
 water, 86000 mg/L @ 25C

insoluble in :
 water

potential blenders :    note
3-acetyl-2,5-dimethyl thiopheneFL
4-allyl-2,6-dimethoxyphenolFL
 benzyl methyl sulfideFL
2-isobutyl-4,5-dimethyl oxazoleFL
4,5-dimethyl-2-propyl oxazoleFL
2,5-dimethyl-4-ethyl oxazoleFL
 furfuryl thioacetateFL
 hexyl mercaptanFL

potential uses :
 banana
 bread
 cheese
 coffee
 fruit tropical fruit
 stabilising agents
 wine

natural occurrence in :    note
 banana  
 beer  
 bread  
 cheese  
 coffee  
 tea black tea  
 wine  

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