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79-31-2

79-31-2 structural image
Product Name: Isobutyric acid
Formula: C4H8O2
Synonyms: 2-Methylpropionic acid;Isobutanoic acid;Isobutyric acid
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CHEMICAL AND PHYSICAL PROPERTIES

Physical Description Isobutyric acid appears as a colorless liquid with a light odor of rancid butter. Corrosive to metals and tissue.
Color/Form Colorless liquid
Odor Pungent odor like that of butyric acid, but not as unpleasant
Taste CHEESY TASTE
Boiling Point 309 °F at 760 mmHg (USCG, 1999)
Melting Point -51 °F (USCG, 1999)
Flash Point 132 °F (NFPA, 2010)
Solubility 167000 mg/L (at 20 °C)
Density 0.949 at 68 °F (USCG, 1999) - Less dense than water; will float
Vapor Density 3.0
Vapor Pressure 1.81 [mmHg]
LogP 0.94
LogS 0.28
Henry's Law Constant Henry's Law constant = 8.85X10-7 atm-cu m/mol at 25 °C
Stability/Shelf Life Stable during transport.
Autoignition Temperature 935 °F (USCG, 1999)
Decomposition When heated to decomposition it emits acrid smoke and fumes.
Viscosity 1.126 mPa.s
Corrosivity /2-Methylpropanoic acid/ is corrosive to metals.
Heat of Vaporization 11,182.8 g cal/g mole
Surface Tension 24.4mN/m at 25 °C /Methyl propanoate/
Odor Threshold Odor Threshold Low: 8.0 [mmHg] [Merck Index] Odor threshold from CHEMINFO
Refractive Index Index of refraction: 1.3930 at 20 °C/D
Dissociation Constants 4.84 (at 20 °C)
Kovats Retention Index 752 732 723 731 731 780 756 723
Other Experimental Properties Hydroxyl radical reaction rate constant = 2.00X10-12 cu cm/molec-sec at 25 °C
Chemical Classes Other Classes -> Organic Acids

SAFETY INFORMATION

Signal word Danger
Pictogram(s)

Flame
Flammables
GHS02

Corrosion
Corrosives
GHS05

Skull and Crossbones
Acute Toxicity
GHS06
GHS Hazard Statements H226:Flammable liquids
H302:Acute toxicity,oral
H311:Acute toxicity,dermal
H314:Skin corrosion/irritation
Precautionary Statement Codes P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking.
P233:Keep container tightly closed.
P280:Wear protective gloves/protective clothing/eye protection/face protection.
P301+P312:IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.
P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.
P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

COMPUTED DESCRIPTORS

Molecular Weight 88.11 g/mol
XLogP3 0.8
Hydrogen Bond Donor Count 1
Hydrogen Bond Acceptor Count 2
Rotatable Bond Count 1
Exact Mass 88.052429494 g/mol
Monoisotopic Mass 88.052429494 g/mol
Topological Polar Surface Area 37.3 Ų
Heavy Atom Count 6
Formal Charge 0
Complexity 56.6
Isotope Atom Count 0
Defined Atom Stereocenter Count 0
Undefined Atom Stereocenter Count 0
Defined Bond Stereocenter Count 0
Undefined Bond Stereocenter Count 0
Covalently-Bonded Unit Count 1
Compound Is Canonicalized Yes

PRODUCT INTRODUCTION

description

Isobutyric acid appears as a colorless liquid with a light odor of rancid butter. Corrosive to metals and tissue.

RELATED SUPPLIERS

JSK Chemicals

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product:79-31-2 Isobutyric acid, 97% 99%

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