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149-57-5

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Identification

Name
2-Ethylhexanoic acid
CAS
149-57-5
Synonyms
2-BUTYLBUTANOIC ACID
2-ETHYLCAPROIC ACID
2-ETHYLCAPRONIC ACID
(+/-)-2-ETHYLHEXANOIC ACID
2-ETHYLHEXANOIC ACID
2-ETHYLHEXOIC ACID
3-HEPTANECARBOXYLIC ACID
A-ETHYLCAPROIC ACID
ALPHA-ETHYLCAPROIC ACID
BUTYLETHYLACETIC ACID
CARBOXYLIC ACID C8
ETHYLBUTYLACETIC ACID
OCTANOIC ACID
RARECHEM AL BE 0136
(RS)-2-Ethylhexansαure
2-Ethyl-1-hexanoic acid
2-Ethyl-1-hexanoicacid
2-ethylhexanoic
2-ethylhexanoicacid(eha)
2-ethyl-hexansyra
EINECS(EC#)
205-743-6
Molecular Formula
C8H16O2
MDL Number
MFCD00002675
Molecular Weight
144.21
MOL File
149-57-5.mol

Chemical Properties

Appearance
colourless liquid
Melting point 
-59 °C
mp 
-59 °C
Boiling point 
228 °C(lit.)

bp 
228 °C(lit.)

density 
0.906
vapor density 
4.98 (vs air)

vapor pressure 
<0.01 mm Hg ( 20 °C)

refractive index 
n20/D 1.425(lit.)

Fp 
230 °F

storage temp. 
Store below +30°C.
solubility 
1.4g/l
pka
pK1:4.895 (25°C)
form 
Liquid
color 
Clear
PH
3 (1.4g/l, H2O, 20℃)
PH Range
3 at 1.4 g/l at 20 °C
Odor
Mild odour
Stability:
Stable. Combustible. Incompatible with strong oxidizing agents, reducing agents, bases.
explosive limit
1.04%, 135°F
Water Solubility 
2 g/L (20 ºC)
BRN 
1750468
InChIKey
OBETXYAYXDNJHR-UHFFFAOYSA-N
Uses
Paint and varnish driers (metallic salts). Ethylhexoates of light metals are used to convert some mineral oils to greases. Its esters are used as plasticizers.
CAS DataBase Reference
149-57-5(CAS DataBase Reference)
NIST Chemistry Reference
Hexanoic acid, 2-ethyl-(149-57-5)
EPA Substance Registry System
149-57-5(EPA Substance)

Safety Data

Hazard Codes 
Xn
Risk Statements 
R63:Possible risk of harm to the unborn child.
Safety Statements 
S36/37:Wear suitable protective clothing and gloves .
RIDADR 
UN 3265 8/PG 2

WGK Germany 
1

RTECS 
MO7700000


13
Autoignition Temperature
699 °F
TSCA 
Yes
HazardClass 
8
PackingGroup 
III
HS Code 
29159080
Safety Profile
Moderately toxic by ingestion and skin contact. An experimental teratogen. A skin and severe eye irritant. Combustible when exposed to heat or flame. When heated to decomposition, it emits acrid and irritating fumes.
Hazardous Substances Data
149-57-5(Hazardous Substances Data)
Toxicity
LD50 orally in Rabbit: 3640 mg/kg LD50 dermal Rabbit > 2000 mg/kg

Raw materials And Preparation Products

Hazard Information

General Description
ETHYLHEXOIC ACID(149-57-5) is a colorless to light yellow liquid with a mild odor. ETHYLHEXOIC ACID(149-57-5) will burn though ETHYLHEXOIC ACID(149-57-5) may take some effort to ignite. ETHYLHEXOIC ACID(149-57-5) is slightly soluble in water. ETHYLHEXOIC ACID(149-57-5) is corrosive to metals and tissue. ETHYLHEXOIC ACID(149-57-5) is used to make paint dryers and plasticizers.
Reactivity Profile
ETHYLHEXOIC ACID is a carboxylic acid. Carboxylic acids donate hydrogen ions if a base is present to accept them. They react in this way with all bases, both organic (for example, the amines) and inorganic. Their reactions with bases, called "neutralizations", are accompanied by the evolution of substantial amounts of heat. Neutralization between an acid and a base produces water plus a salt. Carboxylic acids with six or fewer carbon atoms are freely or moderately soluble in water; those with more than six carbons are slightly soluble in water. Soluble carboxylic acid dissociate to an extent in water to yield hydrogen ions. The pH of solutions of carboxylic acids is therefore less than 7.0. Many insoluble carboxylic acids react rapidly with aqueous solutions containing a chemical base and dissolve as the neutralization generates a soluble salt. Carboxylic acids in aqueous solution and liquid or molten carboxylic acids can react with active metals to form gaseous hydrogen and a metal salt. Such reactions occur in principle for solid carboxylic acids as well, but are slow if the solid acid remains dry. Even "insoluble" carboxylic acids may absorb enough water from the air and dissolve sufficiently in ETHYLHEXOIC ACID to corrode or dissolve iron, steel, and aluminum parts and containers. Carboxylic acids, like other acids, react with cyanide salts to generate gaseous hydrogen cyanide. The reaction is slower for dry, solid carboxylic acids. Insoluble carboxylic acids react with solutions of cyanides to cause the release of gaseous hydrogen cyanide. Flammable and/or toxic gases and heat are generated by the reaction of carboxylic acids with diazo compounds, dithiocarbamates, isocyanates, mercaptans, nitrides, and sulfides. Carboxylic acids, especially in aqueous solution, also react with sulfites, nitrites, thiosulfates (to give H2S and SO3), dithionites (SO2), to generate flammable and/or toxic gases and heat. Their reaction with carbonates and bicarbonates generates a harmless gas (carbon dioxide) but still heat. Like other organic compounds, carboxylic acids can be oxidized by strong oxidizing agents and reduced by strong reducing agents. These reactions generate heat. A wide variety of products is possible. Like other acids, carboxylic acids may initiate polymerization reactions; like other acids, they often catalyze (increase the rate of) chemical reactions.
Health Hazard
Harmful if swallowed, inhaled or absorbed through skin. Material is extremely destructive to tissues of mucous membranes and upper respiratory tract, eyes and skin. Inhalation may be fatal as a result of spasm, inflammation and edema of the larynx, bronchii, chemical pneumonitis and pulmonary edema. Symptoms of exposure may include burning sensation, coughing, wheezing, laryngitis, shortness of breath, headache, nausea and vomiting.
Fire Hazard
This chemical is combustible.
Chemical Properties
colourless liquid

Material Safety Data Sheet(MSDS)

Spectrum Detail

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