Record Information
Version1.0
Creation date2015-10-09 22:31:14 UTC
Update date2017-01-19 02:36:27 UTC
FoodComEx IDPC000539
FoodDB RecordFDB003277
Chemical Information
Name2-Methylpropanoic acid
DescriptionPresent in apple, morello cherry, guava fruit, wine grapes, pineapple, crispbread, other breads, cheeses, wines, scallop and several essential oils, e.g. Roman chamomile. Acid and simple esters used as flavouring agents Isobutyric acid is a carboxylic or short chain fatty acid with characteristic sweat-like smell. Small amount of isobutyrate is generated via microbial (gut) metabolism. Small amounts may also be found in certain foods or fermented beverages. There is anosmia (genetic inability to smell) for the odor of isobutyric acid with a frequency of about 2.5%. (OMIM 207000). Isobutyric acid is slightly soluble in water but much more soluble in ethanol, ether and organic solvents. Isobutyric acid can affect people if breathed in and may be absorbed through the skin. Contact can irritate and burn the skin and eyes. Breathing Isobutyric acid can irritate the nose, throat and lungs causing coughing, wheezing and/or shortness of breath.; Isobutyric acid is an isomer of n-butyric acid; they have the same chemical formula C4H8 O2 but a different structure.; Isobutyric acid, also known as 2-methylpropanoic acid, is a carboxylic acid with structural formula (CH3)2-CH-COOH. It is found in the free state in carobs (Ceratonia siliqua) and in the root of Arnica dulcis, and as an ethyl ester in croton oil.
CAS Number79-31-2
Structure
Thumb
Synonyms
SynonymSource
α-methylpropanoic acidbiospider
α-methylpropionic acidbiospider
1iupbiospider
2-METHYL-propionateGenerator
2-METHYL-PROPIONIC ACIDbiospider
2-Methylpropanoatebiospider
2-Methylpropionatebiospider
2-Methylpropionic acidbiospider
2-MethylpropionsaeureChEBI
2,2-DimethylacetateGenerator
2,2-Dimethylacetic acidChEBI
533-90-4 (calcium salt)biospider
a-IsobutyrateGenerator
a-Isobutyric acidGenerator
A-methylpropanoatebiospider
A-methylpropanoic acidbiospider
A-methylpropionatebiospider
A-methylpropionic acidbiospider
Acetic acid, dimethyl-biospider
alpha-IsobutyrateGenerator
alpha-Isobutyric acidChEBI
Alpha-methylpropanoatebiospider
Alpha-methylpropanoic acidbiospider
Alpha-methylpropionatebiospider
Alpha-methylpropionic acidbiospider
ALQbiospider
Cenex RP b2biospider
Dimethylacetatebiospider
Dimethylacetic acidbiospider
FEMA 2222db_source
I-butyratebiospider
I-butyric acidbiospider
ISBbiospider
Iso-butyratebiospider
Iso-butyric acidbiospider
iso-C3H7COOHbiospider
Isobutanoatebiospider
Isobutanoic acidbiospider
IsobuttersaeureChEBI
Isobutyratebiospider
Isobutyric acidbiospider
Isobutyric acid [UN2529] [Flammable liquid]biospider
Isobutyric acid, 8CIdb_source
Isopropylformatebiospider
Isopropylformic acidbiospider
Methylpropanoic acidbiospider
Methylpropanoic acid, 2-biospider
Methylpropionic acidbiospider
Propanoic acid, 2-methyl-biospider
Propionic acid, 2-methyl-biospider
Tenox EBP 2biospider
Tenox IBP-2biospider
Tenox IBP-2 Grain Prbiospider
Tenox IBP-2 Grain Pr.biospider
α-isobutyrateGenerator
α-isobutyric acidGenerator
α-methylpropanoateGenerator
α-methylpropanoic acidGenerator
α-methylpropionateGenerator
α-methylpropionic acidGenerator
Chemical FormulaC4H8O2
IUPAC name2-methylpropanoic acid
InChI IdentifierInChI=1S/C4H8O2/c1-3(2)4(5)6/h3H,1-2H3,(H,5,6)
InChI KeyKQNPFQTWMSNSAP-UHFFFAOYSA-N
Isomeric SMILESCC(C)C(O)=O
Average Molecular Weight88.1051
Monoisotopic Molecular Weight88.0524295
Chemical Taxonomy
Description Belongs to the class of organic compounds known as carboxylic acids. Carboxylic acids are compounds containing a carboxylic acid group with the formula -C(=O)OH.
KingdomOrganic compounds
Super ClassOrganic acids and derivatives
ClassCarboxylic acids and derivatives
Sub ClassCarboxylic acids
Direct ParentCarboxylic acids
Alternative Parents
Substituents
  • Monocarboxylic acid or derivatives
  • Carboxylic acid
  • Organic oxygen compound
  • Organic oxide
  • Hydrocarbon derivative
  • Organooxygen compound
  • Carbonyl group
  • Aliphatic acyclic compound
Molecular FrameworkAliphatic acyclic compounds
External Descriptors
Physico-Chemical Properties - Experimental
PropertyValueReference
Experimental logP0.94SANGSTER (1993)
Experimental Water Solubility167 mg/mL at 20 oCYALKOWSKY,SH & DANNENFELSER,RM (1992)
Melting PointFp -47°DFC
Foods of Origin
FoodContent Range AverageReference
FoodReference
Production Data
Production Methodcommercial
Production Method ReferenceNot Available
Production Method Reference FileNot Available
Quantity AvailableProduction upon request, up to 4 g
Delivery TimeNot Available
Storage Formliquid
Storage Conditions-80°C
StabilityNot Available
PurityNot Available
Spectra
Spectral Data Upon RequestNot Available
Provider Information
Contact NameContact InstitutionContact Email
Rosa Vazquez Fresnovazquezf@ualberta.ca
Commercial Vendors
AKSci K400
MetaSci HMDB0001873
Tokyo Chemical Industry HMDB0001873
Toronto Research Chemicals I781005