Valeric acid

  • Pentanoic acid
Formula
CH3(CH2)3COOH
Structure
Description
Clear, colorless liquid, with a characteristic, unpleasant odor, similar to butyric acid.
Uses
Intermediate for flavors and perfumes, ester-type lubricants, plasticizers, pharmaceuticals, vinyl stabilizers.

Registry Numbers and Inventories.
CAS
109-52-4
EC (EINECS/ELINCS)
203-677-2
EC Index Number
607-143-00-3
EC Class
Corrosive; Dangerous for the Environment
R 34 52/53
S 26 36 45 61
RTECS
YV6100000
RTECS class
Reproductive Effector
UN (DOT)
3265
Merck
12,10042
Beilstein/Gmelin
969454
Beilstein Reference
4-02-00-00868
Swiss Giftliste 1
G-7732
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C5H10O2
Formula mass
102.13
Melting point, °C
-32
Boiling point, °C
186
Vapor pressure, mmHg
0.45 (25 C)
Vapor density (air=1)
3.52
Saturation Concentration
Approximately 200 ppm (0.02%) at 20 C (calculated)
Evaporization number
0.015 (butyl acetate = 1)
Critical temperature
367
Critical pressure
35.53
Density
1.11 g/cm3
Solubility in water
20 g/L
Viscosity
2.05 cp (25 C)
Surface tension
27.83 g/s2 (15 C)
Refractive index
1.40781 (15 C)
pKa/pKb
4.84 (pKa)
Partition coefficient, pKow
1.39
Heat of vaporization
44.6 kJ/mol
Heat of combustion
-2837.8 kJ/mole

Hazards and Protection.
Storage
Keep away from sources of ignition. Store in a cool, dry, well-ventilated area away from incompatible substances. Keep containers tightly closed.
B3 D1B E
Handling
Wash thoroughly after handling. Wash hands before eating. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation. Use with adequate ventilation.
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 gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
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. Neutralize spill with a weak acid such as vinegar or acetic acid. Clean up spills immediately, using the appropriate protective equipment. Remove all sources of ignition. Provide ventilation.
Disposal code
4
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Ammonia, alkylene oxides, amines, caustics (e.g. ammonia, ammonium hydrozide, calcium hydroxide, potassium hydroxide, sodium hydroxide), epichlorohydrin, isocyanates, strong bases, sulfuric acid.
Decomposition
Carbon monoxide, carbon dioxide, acrid smoke and fumes.

Fire.
Flash Point,°C
86
Autoignition, °C
360
Upper exp. limit, %
7.3
Lower exp. limit, %
1.8
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. Use water spray to keep fire-exposed containers cool. Containers may explode in the heat of a fire. To extinguish fire, use water, dry chemical, chemical foam, or alcohol-resistant foam. Water spray may cause frothing. Cool containers with flooding quantities of water until well after fire is out.
Fire potential
Combustible material: may burn but does not ignite readily.
Hazards
When heated, vapors may form explosive mixtures with air: indoors, outdoors, and sewers explosion hazards.
Combustion products
Irritating vapors and toxic gases, such as carbon dioxide and carbon monoxide, may be formed when involved in fire.
Health
3
 
Flammability
1
 
 
Reactivity
0
 

Health.
Poison_Class
4
Exposure effects
Prolonged or repeated skin contact may cause dermatitis.
   Ingestion
May cause severe gastrointestinal tract irritation with nausea, vomiting and possible burns. Causes severe pain, nausea, vomiting, diarrhea, and shock.
   Inhalation
Irritation may lead to chemical pneumonitis and pulmonary edema. Causes severe irritation of upper respiratory tract with coughing, burns, breathing difficulty, and possible coma.
   Skin
May cause severe irritation and possible burns.
   Eyes
Contact with eyes may cause severe irritation, and possible eye burns. May cause eye injury.

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. Get medical aid immediately.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. DO NOT use mouth-to-mouth respiration.
   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. Discard contaminated clothing in a manner which limits further exposure.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Transport.
UN number
3265
Response guide
Hazard class
8
Packing Group
I; II; III
 
USCG CHRIS Code
POC
 
HS Code
2915 60 90
 
Std. Transport #
4932044
 
IMO Chemical Code
18
IMO Pollution Category
D