Isobutylamine is an organic chemical compound (specifically, an amine) with the formula (CH₃)₂CHCH₂NH₂, and occurs as a colorless liquid.^[1][2] Isobutylamine is one of the four isomeric amines of butane, the others being n-butylamine, sec-butylamine and tert-butylamine. It is the decarboxylated form of the amino acid valine, and the product of the metabolism thereof by the enzyme valine decarboxylase.

Quick Facts Names, Identifiers ...

Isobutylamine

Names
Preferred IUPAC name 2-Methylpropan-1-amine
Other names (2-Methylpropyl)amine
Identifiers
CAS Number	78-81-9 Y
3D model (JSmol)	Interactive image
3DMet	B00498
Beilstein Reference	385626
ChEBI	CHEBI:15997 Y
ChemSpider	6310 Y
ECHA InfoCard	100.001.042
EC Number	201-145-4
Gmelin Reference	81862
KEGG	C02787 Y
MeSH	isobutylamine
PubChem CID	6558
RTECS number	NP9900000
UNII	1H60H4LOHZ Y
UN number	1214
CompTox Dashboard (EPA)	DTXSID9025459
InChI InChI=1S/C4H11N/c1-4(2)3-5/h4H,3,5H2,1-2H3 Y Key: KDSNLYIMUZNERS-UHFFFAOYSA-N Y
SMILES CC(C)CN
Properties
Chemical formula	C4H11N
Molar mass	73.139 g·mol−1
Appearance	Colorless liquid
Odor	Fishy, ammoniacal
Density	736 mg mL−1
Melting point	−86.6 °C; −124.0 °F; 186.5 K
Boiling point	67 to 69 °C; 152 to 156 °F; 340 to 342 K
Solubility in water	Miscible
Magnetic susceptibility (χ)	-59.8·10−6 cm3/mol
Refractive index (nD)	1.397
Viscosity	500 μPa s (at 20 °C)
Thermochemistry
Heat capacity (C)	194 J K−1 mol−1
Std enthalpy of formation (ΔfH⦵298)	−133.0–−132.0 kJ mol−1
Std enthalpy of combustion (ΔcH⦵298)	−3.0139–−3.0131 MJ mol−1
Hazards
GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H225, H301, H314
Precautionary statements	P210, P280, P301+P310, P305+P351+P338, P310
Flash point	−9 °C (16 °F; 264 K)
Lethal dose or concentration (LD, LC):
LD50 (median dose)	224 mg kg−1 (oral, rat)
Related compounds
Related alkanamines	Ethylamine Ethylenediamine Propylamine Isopropylamine 1,2-Diaminopropane 1,3-Diaminopropane tert-Butylamine n-Butylamine sec-Butylamine Putrescine
Related compounds	2-Methyl-2-nitrosopropane N-Methylisobutylamine
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is YN ?) Infobox references

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Isobutylamine is an odorant binding to TAAR3 in mice and can trigger sexual behaviour in male mice dependent on the cluster of TAAR2 through TAAR9.^[3]