Octanoic acid

  • Caprylic acid
Formula
CH3(CH2)6COOH
Structure
Description
Colorless, oily liquid with a characteristic unpleasant, irritating odor. May solidify to leafy crystals when used or stored below room temperature.
Uses
Synthesis of various dyes, drugs, perfumes, antiseptics and fungicides, ore separations, synthetic flavors.

Registry Numbers and Inventories.
CAS
124-07-2
EC (EINECS/ELINCS)
204-677-5
EC Class
corrosive
S 26 36/37/39 45
RTECS
RH0175000
RTECS class
Mutagen; Primary Irritant
UN (DOT)
3265
Merck
13,1771
Beilstein/Gmelin
1747180
Beilstein Reference
4-02-00-00982
EPA OPP
128919
Swiss Giftliste 1
G-2179
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C8H16O2
Formula mass
144.22
Melting point, °C
16
Boiling point, °C
239.7
Vapor pressure, mmHg
0.022 (25 C)
Vapor density (air=1)
5.0
Saturation Concentration
Extremely low at room temperature.
Odor Threshold Odor threshold It can be detected @ 0.008 ppm.
Critical temperature
421
Critical pressure
26.65
Density
0.9066 g/cm3
Solubility in water
Soluble
Viscosity
5.86 cp (20 C)
Surface tension
23.7 g/s2
Refractive index
1.428 (20 C)
pKa/pKb
4.895 (pKa)
Partition coefficient, pKow
3.05
Heat of vaporization
40.3 kJ/mol
Heat of combustion
-4799.9 kJ/mol

Hazards and Protection.
Storage
Keep container closed when not in use. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Corrosives area.
E
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use only in a well ventilated area. Do not get in eyes, on skin, or on clothing. Keep container tightly closed. Do not ingest or inhale. Use with adequate ventilation. Discard contaminated shoes.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use. Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Clean up spills immediately, using the appropriate protective equipment. Provide ventilation.
Disposal code
4
Stability
Stable under normal temperatures and pressures. Forms explosive mixtures with air (56F/13C).
Incompatibilities
Strong oxidizing agents.
Decomposition
Carbon monoxide, carbon dioxide, acrid smoke and fumes.

Fire.
Flash Point,°C
107
Autoignition, °C
440
Upper exp. limit, %
6.4
Lower exp. limit, %
1
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. May accumulate static electrical charges, and may cause ignition of its own vapors. Extinguishing media: Water may be ineffective. In case of fire use water spray, dry chemical, carbon dioxide, or chemical foam.
Fire potential
This chemical is combustible.
Hazards
When heated, vapors may form explosive mixtures with air: indoors, outdoors, and sewers explosion hazards.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.
Health
3
 
Flammability
0
 
 
Reactivity
0
 

Health.
Poison_Class
4
Exposure effects
Chronic inhalation may cause effects similar to those of acute inhalation. Effects may be delayed.
   Ingestion
May cause severe and permanent damage to the digestive tract. Causes gastrointestinal tract burns. May cause perforation of the digestive tract. May cause systemic effects.
   Inhalation
Dust is irritating to the respiratory tract. Causes chemical burns to the respiratory tract. Aspiration may cause respiratory swelling and pneumonitis. Causes irritation of mucous membrane. Aspiration may lead to pulmonary edema. May cause systemic effects.
   Skin
Causes skin burns. May cause skin burns. Causes severe skin irritation and burns. May cause skin rash (in milder cases), and cold and clammy skin with cyanosis or pale color.
   Eyes
Causes eye burns. May cause chemical conjunctivitis and corneal damage.

First aid
 
   Ingestion
Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Possible aspiration hazard. Get medical aid immediately.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If breathing is difficult, give oxygen. DO NOT use mouth-to-mouth respiration. If breathing has ceased apply artificial respiration using oxygen and a suitable mechanical device such as a bag and a mask.
   Skin
Get medical aid immediately. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse. Destroy contaminated shoes.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately. Do NOT allow victim to rub or keep eyes closed. Extensive irrigation is required (at least 30 minutes).

Transport.
UN number
3265
Response guide
Hazard class
8
Packing Group
I; II; III
 
USCG CHRIS Code
OAA
 
HS Code
2915 90 80
 
Std. Transport #
4932037
 
IMO Chemical Code
18
IMO Pollution Category
D