Trioctyl phosphate

  • tris(2-Ethylhexyl) phosphate
  • Phosphoric acid tris(2-ethylhexyl) ester
Formula
[CH3(CH2)3CH(C2H5)CH2O]3PO
Structure
Description
Pale yellow liquid.
Uses
Flame retardant plasticizer for polyvinyl chloride resins.

Registry Numbers and Inventories.
CAS
78-42-2
EC (EINECS/ELINCS)
201-116-6
EC Class
irritant
R 36/38
RTECS
MP0770000
RTECS class
Tumorigen; Primary Irritant
Beilstein/Gmelin
1715839
Beilstein Reference
4-01-00-01786
Swiss Giftliste 1
G-2152
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C24H51O4P
Formula mass
434.65
Melting point, °C
-70
Boiling point, °C
406
Vapor pressure, mmHg
2E-6 (25 C)
Vapor density (air=1)
14.95
Density
0.92 g/cm3 (20 C)
Solubility in water
Insoluble
Refractive index
1.443 (20 C)
Partition coefficient, pKow
10.09
Heat of vaporization
63.2 kJ/mol

Hazards and Protection.
Storage
In general, materials which are toxic as stored or which can decomp into toxic components.Should be stored in a cool, well-ventilated place, out of direct rays of the sun, away from areas of high fire hazard, and should be periodically inspected. Incompatible materials should be isolated from each other.
Handling
Containers of this material may be hazardous when emptied. Since emptied containers retain product residues (vapor, liquid, and/or solid), all hazard precautions given in the data sheet must be observed.
Protection
Chemical splash goggles in compliance with OSHA regulations are advised; however, OSHA regulations also permit other type safety glasses. Wear resistant gloves. To prevent repeated or prolonged skin contact, wear impervious clothing and boots.
Respirators
Wear a NIOSH-approved half face respirator equipped with an organic vapor/acid gas cartridge (specific for organic vapors, HCl, acid gas and SO2) with a dust/mist filter.
Small spills/leaks
If you spill this chemical, FIRST REMOVE ALL SOURCES OF IGNITION. Then, use absorbent paper to pick up all liquid spill material. Your contaminated clothing and absorbent paper should be sealed in a vapor-tight plastic bag for eventual disposal. Solvent wash all contaminated surfaces with 60-70% ethanol followed by washing with a soap and water solution. Do not reenter the contaminated area until the Safety Officer (or other responsible person) has verified that the area has been properly cleaned.
Disposal code
1
Stability
Stable.
Incompatibilities
Incompatible with oxidizing materials Incompatible with cellulose acetate and cellulose acetate butyrate.
Decomposition
Oxides of carbon and phosphorous.

Fire.
Flash Point,°C
170
Autoignition, °C
370
Fire fighting
Fires involving this material can be controlled with a dry chemical, carbon dioxide or Halon extinguisher. A water spray may also be used.
Fire potential
This chemical is combustible.

Health.
Poison_Class
5
Exposure effects
The toxological properties of this substance have not been fully investigated.
   Ingestion
Swallowing small amounts of this material during normal handling is not likely to cause harmful effects. Swallowing large amounts may be harmful.
   Inhalation
Symptoms of exposure to this compound include irritation of the skin and eyes. Skin contact may cause discomfort, itching, reddening and swelling of the skin. Eye contact may cause discomfort, redness, tearing and swelling. Other symptoms may include difficult breathing and pulmonary edema.
   Skin
Can cause skin irritation. Symptoms may include redness and burning of skin, and other skin damage.
   Eyes
May cause mild eye irritation. Symptoms include stinging, tearing, and redness.

First aid
 
   Ingestion
DO NOT INDUCE VOMITING. If the victim is conscious and not convulsing, give 1 or 2 glasses of water to dilute the chemical and IMMEDIATELY call a hospital or poison control center. Be prepared to transport the victim to a hospital if advised by a physician.
   Inhalation
IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. If symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop, call a physician and be prepared to transport the victim to a hospital. Provide proper respiratory protection to rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus (SCBA) should be used.
   Skin
IMMEDIATELY flood affected skin with water while removing and isolating all contaminated clothing. Gently wash all affected skin areas thoroughly with soap and water. If symptoms such as redness or irritation develop, IMMEDIATELY call a physician and be prepared to transport the victim to a hospital for treatment.
   Eyes
First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop.

Transport.
HS Code
2919 00 90