Palmitic acid

  • Hexadecanoic acid
  • Cetylic acid
  • 1-Pentadecanecarboxylic acid
  • Palmitinic acid
  • Prifac 2960
  • Neo-Fat 16
Formula
CH3(CH2)14COOH
Structure
Description
White crystals, scales or flakes or white to yellow-white crystalline solid or powder.
Uses
Manufacture of metallic palmitates, soaps, lube oils, waterproofing, food-grade additives.

Registry Numbers and Inventories.
CAS
57-10-3
EC (EINECS/ELINCS)
200-312-9
R 36/37/38
RTECS
RT4550000
RTECS class
Tumorigen; Natural Product; Primary Irritant
Merck
12,7128
Beilstein/Gmelin
607489
Beilstein Reference
4-02-00-01157
Swiss Giftliste 1
G-7389
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C16H32O2
Formula mass
256.43
Melting point, °C
61 - 63
Boiling point, °C
352
Vapor pressure, mmHg
3E-5 (25 C)
Saturation Concentration
Very low at 25 C
Evaporization number
Negligible
Critical temperature
457
Critical pressure
14.90
Density
0.853 g/cm3 (20 C)
Solubility in water
Insoluble
Viscosity
142.90 cp (160 C)
Surface tension
28.2 g/s2 at 70 C
Refractive index
1.4281 (70 C)
pKa/pKb
4.78 (pKa)
Partition coefficient, pKow
7.17
Heat of vaporization
61.7 kJ/mol
Heat of combustion
-10030.6 kJ/mol

Hazards and Protection.
Storage
Keep away from sources of ignition. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
Insufficient information
Handling
Remove contaminated clothing and wash before reuse. Use only in a well ventilated area. Minimize dust generation and accumulation. Use spark-proof tools and explosion proof equipment. Avoid breathing dust, vapor, mist, or gas. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation.
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 minimize contact with skin.
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.
Small spills/leaks
Vacuum or sweep up material and place into a suitable disposal container. Avoid generating dusty conditions. Remove all sources of ignition. Use a spark-proof tool. Provide ventilation. Clean up residual material by washing area with a 2-5% solution of soda ash.
Disposal code
4
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Bases, oxidizing materials, reducing materials.
Decomposition
Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.

Fire.
Flash Point,°C
154
Autoignition, °C
377
Upper exp. limit, %
4.9
Lower exp. limit, %
0.5
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. Will burn if involved in a fire. This material in sufficient quantity and reduced particle size is capable of creating a dust explosion. Extinguishing media: Use agent most appropriate to extinguish fire. In case of fire use water spray, dry chemical, carbon dioxide, or appropriate foam.
Health
2
 
Flammability
1
 
 
Reactivity
0
 

Health.
Poison_Class
-
Exposure effects
The toxicological properties of this material have not been investigated.
   Ingestion
May cause gastrointestinal irritation with nausea, vomiting and diarrhea. The toxicological properties of this substance have not been fully investigated.
   Inhalation
Causes respiratory tract irritation. The toxicological properties of this substance have not been fully investigated.
   Skin
Causes skin irritation.
   Eyes
Causes eye irritation.

First aid
 
   Ingestion
Never give anything by mouth to an unconscious person. Get medical aid. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid if cough or other symptoms appear.
   Skin
Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Get medical aid if irritation develops or persists. Wash clothing before reuse.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.
USCG CHRIS Code
FAD
 
HS Code
2915 70 15
 
IMO Chemical Code
18
IMO Pollution Category
III