Tri(p-tolyl) phosphite

  • Tris(4-tolyl) phosphite
  • Tri-p-cresyl phosphite
  • Tris(p-methylphenyl) phosphite
  • Tris(4-methylphenyl) phosphite
  • Phosphorous acid, tri-p-tolyl ester
  • Phosphorous acid, tris(4-methylphenyl) ester
Formula
C21H21O3P
Structure
Description
Slightly yellow powder.

Registry Numbers and Inventories.
CAS
620-42-8
EC (EINECS/ELINCS)
210-639-9
RTECS
TH1100000
RTECS class
Other
Beilstein/Gmelin
620298
Beilstein Reference
4-06-00-02128
Canada DSL/NDSL
NDSL
US TSCA
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
C21H21O3P
Formula mass
352.36
Melting point, °C
116 - 120
Boiling point, °C
414
Vapor pressure, mmHg
1E-6
Density
1.134 g/cm3 (15 C)
Solubility in water
Insoluble
Refractive index
1.5751 (20 C)
Partition coefficient, pKow
8.81
Heat of vaporization
64.1 kJ/mol

Hazards and Protection.
Storage
Keep away from sources of ignition. Store in a cool, dry place. Store in a tightly closed container. Corrosives area.
Handling
Avoid breathing dust, vapor, mist, or gas. Avoid contact with skin and eyes.
Protection
Wear appropriate protective clothing and gloves to prevent skin exposure. Use safety goggles.
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
Vacuum or sweep up material and place into a suitable disposal container.
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents.
Decomposition
Carbon monoxide, oxides of phosphorus, carbon dioxide.

Fire.
Flash Point,°C
253
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Will burn if involved in a fire. Combustible Liquid. Can form explosive mixtures at temperatures above the flashpoint. To extinguish fire use water spray, dry chemical, carbon dioxide, or chemical foam.

Health.
Exposure effects
   Ingestion
Causes gastrointestinal tract burns. May cause corrosion and permanent tissue destruction of the esophagus and digestive tract.
   Inhalation
May cause irritation of the respiratory tract with burning pain in the nose and throat, coughing, wheezing, shortness of breath and pulmonary edema. Causes chemical burns to the respiratory tract. May cause abdominal pain, nausea, vomiting, and inflammation of the gums nd mouth.
   Skin
May cause severe irritation and possible burns.
   Eyes
Contact with eyes may cause severe irritation, and possible eye burns.

First aid
 
   Ingestion
Get medical aid. Wash mouth out with water.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
   Skin
Get medical aid. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.