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Description References
Isobutyraldehyde structure
Chemical Name:
FEMA 2220;NCI-C60968;Isobutanal;isobutyral;isobutyric;iso-Butanal;iso-C3H7CHO;methylpropanal;valinealdehyde;Isobutaldehyde
Molecular Formula:
Formula Weight:
MOL File:

Isobutyraldehyde Properties

Melting point:
−65 °C(lit.)
Boiling point:
63 °C(lit.)
0.79 g/mL at 25 °C(lit.)
vapor density 
2.5 (vs air)
vapor pressure 
66 mm Hg ( 4.4 °C)
refractive index 
n20/D 1.374(lit.)
Flash point:
−40 °F
storage temp. 
water: soluble11g/100mL at 20°C(lit.)
explosive limit
Water Solubility 
75 g/L (20 ºC)
Air Sensitive
JECFA Number
Stable. Refrigerate. Highly flammable. Incompatible with strong oxidizing agents, strong bases, strong acids, strong reducing agents.
CAS DataBase Reference
78-84-2(CAS DataBase Reference)
NIST Chemistry Reference
Propanal, 2-methyl-(78-84-2)
EPA Substance Registry System
Propanal, 2-methyl-(78-84-2)
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
  • NFPA
Hazard Codes  F,Xn,Xi
Risk Statements  11-22-36
Safety Statements  16-36/37-9-33-29-26
RIDADR  UN 2045 3/PG 2
WGK Germany  1
RTECS  NQ4025000
Autoignition Temperature 384 °F
HS Code  2912 19 00
HazardClass  3
PackingGroup  II
Hazardous Substances Data 78-84-2(Hazardous Substances Data)
Toxicity LD50 orally in rats: 3.7 g/kg (Smyth)
Signal word: Danger
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H225 Highly Flammable liquid and vapour Flammable liquids Category 2 Danger P210,P233, P240, P241, P242, P243,P280, P303+ P361+P353, P370+P378,P403+P235, P501
H302 Harmful if swallowed Acute toxicity,oral Category 4 Warning P264, P270, P301+P312, P330, P501
H303 May be harmfulif swallowed Acute toxicity,oral Category 5 P312
H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P
H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning
H341 Suspected of causing genetic defects Germ cell mutagenicity Category 2 Warning P201,P202, P281, P308+P313, P405,P501
H401 Toxic to aquatic life Hazardous to the aquatic environment, acute hazard Category 2 P273, P501
Precautionary statements:
P201 Obtain special instructions before use.
P202 Do not handle until all safety precautions have been read and understood.
P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking.
P233 Keep container tightly closed.
P240 Ground/bond container and receiving equipment.
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P264 Wash hands thoroughly after handling.
P264 Wash skin thouroughly after handling.
P270 Do not eat, drink or smoke when using this product.
P271 Use only outdoors or in a well-ventilated area.
P273 Avoid release to the environment.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
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.
P308+P313 IF exposed or concerned: Get medical advice/attention.
P370+P378 In case of fire: Use … for extinction.
P405 Store locked up.
P403+P233 Store in a well-ventilated place. Keep container tightly closed.

NFPA 704

Diamond Hazard Value Description
Flammability   3 Liquids and solids (including finely divided suspended solids) that can be ignited under almost all ambient temperature conditions . Liquids having a flash point below 22.8 °C (73 °F) and having a boiling point at or above 37.8 °C (100 °F) or having a flash point between 22.8 and 37.8 °C (73 and 100 °F). (e.g. gasoline, acetone)
Instability   1 Normally stable, but can become unstable at elevated temperatures and pressures (e.g. propene)

(NFPA, 2010)

Isobutyraldehyde price More Price(25)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 240788 Isobutyraldehyde ≥99% 78-84-2 2ml $28.7 2018-11-13 Buy
Sigma-Aldrich 240788 Isobutyraldehyde ≥99% 78-84-2 100ml $60.9 2018-11-13 Buy
TCI Chemical I0101 Isobutyraldehyde >98.0%(GC) 78-84-2 25mL $15 2018-11-22 Buy
TCI Chemical I0101 Isobutyraldehyde >98.0%(GC) 78-84-2 500mL $23 2018-11-22 Buy
Alfa Aesar A12106 Isobutyraldehyde, 98% 78-84-2 500ml $23.2 2018-11-13 Buy

Isobutyraldehyde Chemical Properties,Uses,Production


Isobutyraldehyde, also known as 2-Methylpropanal, is an organic compound belonging to the family of aldehydes, which can be found in alcoholic beverages, tea, breads, cooked pork, spearmint oil as well as fresh fruits, such as apple, banana, cherry, etc. It is manufactured by the hydroformylation of propene, usually obtained as a side-product. It can be applied as a source for producing other chemicals, including isobutyl alcohol, neopentyl glycol as well as isobutanoic acid production and used to produce amino acids such as valine and leucine. Besides, isobutyraldehyde commonly serves as an intermediate in the field of chemical industry for manufacture of pharmaceuticals (such as Vitamin B5), crop protection products, pesticides, synthetic resins, antioxidants, vulcanisation accelerators, textile auxiliaries, perfumery and flavors.



Isobutyraldehyde has a characteristic odor. Synthesized via oxidation of isobutyl alcohol with potassium dichromate and concentrated sulfuric acid.

Chemical Properties

Isobutyraldehyde has a characteristic sharp, pungent odor.

Chemical Properties

colourless liquid with an extremely unpleasant smell


Reported found in apple and currant aromas and in the essential oils from tobacco leaves and tea leaves, also in the essential oils of Pinus jeffreyi Murr. leaves, Citrus aurantium leaves, and Datura stramonium. Reported found in apple, banana, sweet and sour cherry, currants, kohlrabi, carrots, celery, peas, potato, tomato, peppermint, corn mint and spearmint oil, vinegar, wheat and rye breads, cheeses, butter, yogurt, egg, caviar, fatty fish, meats, hop oil, beer, brandy, rum, sherry, cider, whiskies, grape wines, cocoa, coffee, tea, filberts, peanuts, popcorn, oats, soybeans, honey, mushrooms, macadamia nuts, cauliflower, pear and apple brandy, rice, sukiyaki, malt, loquat, clary sage, shrimps, truffle, scallops and squid


Isobutyraldehyde is used in the synthesisof cellulose esters, resins, and plasticizers;in the preparation of pantothenic acid andvaline; and in flavors.


In the synthesis of pantothenic acid, valine, leucine, cellulose esters, perfumes, flavors, plasticizers, resins, gasoline additives.


ChEBI: A member of the class of propanals that is propanal substituted by a methyl group at position 2.


By oxidation of isobutyl alcohol with potassium dichromate and concentrated sulfuric acid.

Aroma threshold values

Detection: 0.4 to 43 ppb

General Description

A clear colorless liquid with a pungent odor. Flash point of -40°F. Less dense than water and insoluble in water. Hence floats on water. Vapors are heavier than air. Used to make other chemicals.

Air & Water Reactions

Highly flammable. Oxidizes slowly on exposure to air. Stable (less than 10% decomposition) for four hours when exposed to light and air in a closed system. Stable for two weeks when stored under nitrogen at temperatures up to 77°F. Insoluble in water.

Reactivity Profile

Isobutyraldehyde can react vigorously with reducing agents, with oxidizing agents, strong bases and mineral acids. Can undergo exothermic self-condensation or polymerization reactions that are often catalyzed by acid. Generates flammable and/or toxic gases in combination with azo, diazo compounds, dithiocarbamates, nitrides, and strong reducing agents. Reacts slowly when exposed to air with air to give peroxides and other products. These reactions are activated by light, catalyzed by salts of transition metals, and are autocatalytic (catalyzed by their products). The addition of stabilizers (antioxidants) retards autoxidation.


Highly flammable, dangerous fire and explosion risk. Irritant to skin and eyes.

Health Hazard

Vapor is irritating to the eyes and mucous membranes.

Health Hazard

Isobutyraldehyde is a moderate skin and eyeirritant; the effect may be slightly greaterthan that of n-butyraldehyde. An amounttotaling 500 mg in 24 hours produced severeskin irritation in rabbits; 100 mg causedmoderate eye irritation.
The toxicity of isobutyraldehyde determinedon test animals was very low. Exposureto 8000 ppm (23,600 mg/m3) for 4 hours waslethal to rats.
LD50 value, oral (rats): 2810 mg/kg.

Fire Hazard

Behavior in Fire: Vapors are heavier than air and may travel considerable distance to a source of ignition and flash back. Fires are difficult to control due to ease of reignition.

Fire Hazard

Flash Point (°F): 13 ℃, -40 ℃; Flammable Limits in Air (%): 2.0 -10.0; Fire Extinguishing Agents: Foam, dry chemical or carbon dioxide; Fire Extinguishing Agents Not To Be Used: Data not available; Special Hazards of Combustion Products: Not pertinent; Behavior in Fire: Vapors are heavier than air and may travel considerable distances to a source of ignition and flash back. Fires are difficult to control because of reignition; Ignition Temperature (°F): 385; Electrical Hazard: Not pertinent; Burning Rate: 4.8 mm/min.

Chemical Reactivity

Reactivity with Water No reaction; Reactivity with Common Materials: No reactions; Stability During Transport: Stable; Neutralizing Agents for Acids and Caustics: Not pertinent; Polymerization: Not pertinent; Inhibitor of Polymerization: Not pertinent.

Purification Methods

Dry isobutyraldehyde with CaSO4 and use it immediately after distillation under nitrogen because of the great difficulty in preventing oxidation. It can be purified through its acid bisulfite derivative. [Beilstein 1 IV 3262.]

Waste Disposal

Isobutyraldehyde is burned in a chemicalincinerator equipped with an afterburner andscrubber.

Isobutyraldehyde Preparation Products And Raw materials

Raw materials

Preparation Products

Isobutyraldehyde Suppliers

Global( 178)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Henan DaKen Chemical CO.,LTD.
+86-371-55531817 CHINA 21930 58
Henan Tianfu Chemical Co.,Ltd.
0371-55170693 CHINA 20680 55
Mainchem Co., Ltd.
+86-0592-6210733 CHINA 32457 55
Xiamen AmoyChem Co., Ltd
+86 (0)592-605 1114 CHINA 6374 58
career henan chemical co
+86-371-86658258 CHINA 20516 58
Chemwill Asia Co.,Ltd.
86-21-51861608;;; CHINA 23982 58
Hubei Jusheng Technology Co.,Ltd.
86-188-71490254 CHINA 20094 58
Shanghai Aladdin Bio-Chem Technology Co.,LTD 021-20337333/400-620-6333
021-50323701 China 24991 65
Shandong Dong Ajinyuan Chemical Co., Ltd. 18963592510 CHINA 17 58
Shandong Dong Ajinyuan Chemical Co., Ltd. 18963573761
18963573761 China 18 58

View Lastest Price from Isobutyraldehyde manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2018-07-23 Isobutyraldehyde
US $1800.00 / KG 25KG 99% 20tons career henan chemical co

Isobutyraldehyde Spectrum

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