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W222003

Sigma-Aldrich

Isobutyraldehyde

≥98%, FG

Synonym(s):

2-Methylpropanal, Isobutanal, 2-Methylpropionaldehyde

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About This Item

Linear Formula:
(CH3)2CHCHO
CAS Number:
78-84-2
Molecular Weight:
72.11
FEMA Number:
2220
Beilstein/REAXYS Number:
605330
EC Number:
201-149-6
Council of Europe no.:
92
MDL number:
MFCD00006980
UNSPSC Code:
12164502
PubChem Substance ID:
24900932
Flavis number:
5.004
NACRES:
NA.21
Organoleptic:
fresh; green; floral
Grade:
FG
Fragrance grade
Halal
Kosher
Biological source:
synthetic
Agency:
follows IFRA guidelines
meets purity specifications of JECFA
Food allergen:
no known allergens

Key Documents

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biological source

synthetic

Quality Level

300
400

grade

FG
Fragrance grade
Halal
Kosher

agency

follows IFRA guidelines
meets purity specifications of JECFA

reg. compliance

EU Regulation 1223/2009
EU Regulation 1334/2008 & 178/2002
FDA 21 CFR 117
FDA 21 CFR 172.515

vapor density

2.5 (vs air)

vapor pressure

66 mmHg ( 4.4 °C)

assay

≥98%

autoignition temp.

384 °F

expl. lim.

10 %, 25 °F
2 %, 32 °F

refractive index

n20/D 1.374 (lit.)

bp

63 °C (lit.)

mp

−65 °C (lit.)

solubility

60 g/L at 25 °C

density

0.79 g/mL at 25 °C (lit.)

application(s)

flavors and fragrances

documentation

see Safety & Documentation for available documents

food allergen

no known allergens

fragrance allergen

no known allergens

organoleptic

fresh; green; floral

storage temp.

2-8°C

SMILES string

[H]C(=O)C(C)C

InChI

1S/C4H8O/c1-4(2)3-5/h3-4H,1-2H3

InChI key

AMIMRNSIRUDHCM-UHFFFAOYSA-N

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General description

Isobutyraldehyde is an aliphatic aldehyde that can be used as a flavoring agent. It has been identified as one of the volatile flavor components in wheat essence. Some humans are anosmic towards the odor of isobutanal.

pictograms

FlameExclamation mark
GHS02,GHS07

signalword

Danger

hcodes

H225,H319

Hazard Classifications

Eye Irrit. 2 - Flam. Liq. 2

Storage Class

3 - Flammable liquids

wgk_germany

WGK 1

flash_point_f

-11.2 °F - closed cup

flash_point_c

-24 °C - closed cup

ppe

Eyeshields, Faceshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
SHBP0357
SHBN9907
SHBN8681
STBK1795
SHBM9589

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Burdock GA
Encyclopedia of Food and Color Additives, 1, 1462-1463 (1997)
Specific anosmia to isobutyraldehyde: the malty primary odor.
MOORE JE, et al.
Chemical Senses, 2(1), 17-25 (1976)
Wheat flavor components
Mcwilliams M & Mackey AC
Journal of Food Science, 34(6), 493-496 (1969)
Bettina M Pause et al.
Psychophysiology, 40(2), 209-225 (2003-06-25)
The aim of the present study was to investigate the similarities and differences in the olfactory and visual processing of emotional stimuli in healthy subjects and in patients with major depressive disorder (MDD). Twenty-five inpatients were investigated after admission to
Atsushi Sato et al.
Chemical communications (Cambridge, England), (46)(46), 6242-6244 (2008-12-17)
Phenylalanine lithium salt was found to be an effective catalyst for asymmetric Michael addition of isobutyraldehyde with beta-nitroalkenes to give quaternary carbon-containing nitroalkanes.
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