Phosphoric acid, mono(2-ethylhexyl) ester

  • 2-Ethylhexyl acid phosphate
  • 2-Ethylhexyl dihydrogen phosphate
  • 1-Hexanol, 2-ethyl, dihydrogen phosphate
  • Mono(2-ethylhexyl) phosphate
  • Orthophosphoric acid, 2-ethylhexyl alcohol monoester
Formula
C8H19O4P
Structure
Description
Light tan colored paste.
Uses
Surface-active agent (hydrotrope, penetrant, wetting agent).

Registry Numbers and Inventories.
CAS
1070-03-7
EC (EINECS/ELINCS)
213-967-0
RTECS
TC6593725
RTECS class
Primary Irritant
Beilstein/Gmelin
1908502
EPA OPP
111286
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C8H19O4P
Formula mass
210.24
Density
1.0034 g/cm3 (20 C)
Solubility in water
Very soluble
Refractive index
1.443 (20 C)
pKa/pKb
1.93 (pKa)

Hazards and Protection.
Storage
Store away from foodstuffs or animal feed. Containers should be stored in a cool, dry, well-ventilated area away from flammable or incompatible materials and sources of heat or flame. Exercise due caution to prevent damage to or leakage from the container.
Handling
Keep away from heat, sparks, and open flames. Avoid contact with skin. Avoid inhalation of vapors and mists. Personnel handling this product should wash thoroughly after contact with this product.
Protection
Chemical splash goggles in compliance with OSHA regulations are advised; however, OSHA regulations also permit other type safety glasses. Whre chemical resistant gloves. To prevent repeated or prolonged skin contact, wear impervious clothing and boots.
Respirators
Use a NIOSH-approved organic vapor acid gas respirator (OVAG) with dust , mist, and fume filters to reduce potential for inhalation exposure if use conditions generate vapor, mist, or aerosol and adequate ventilation (e.g., outdoor or well ventilated area) is not available. Where exposure potential necessitates a higher level of protection use a NIOSH-approved, positive-pressure, pressure demand, air-supplied respirator.
Small spills/leaks
Stop source of spill. Dike area to prevent spill from spreading. Soak up liquid with suitable absorbent such as clay, sawdust, or kitty litter. Sweep up absorbed material and place in a chemical waste container for disposal. CAUTION! The spill area may be slippery.
Stability
Stable at ambient temperatures and atmospheric pressures.
Incompatibilities
Strong oxidizing agents.
Decomposition
Oxides of phosphorous, carbon.

Fire.
Flash Point,°C
93
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 agent most appropriate to extinguish fire.
Health
2
 
Flammability
1
 
 
Reactivity
0
 

Health.
Exposure effects
   Ingestion
Nausea, vomiting, and diarrhea are common. Oral, pharyngeal and esophageal burns may occur following ingestion of low phosphate detergents which are generally more alkaline. Colitis, esophageal stricture, and irritation of mucous membranes have also been reported.
   Inhalation
Occupational asthma has been reported. Aspiration may result in upper airway edema and significant respiratory distress. Difficulty in breathing has been described in animals inhaling high concentrations of anionic surfactants.
   Skin
Skin irritation has been reported after prolonged occupational dermal contact. Skin dryness, irritation, and contact dermatitis have been reported following varying degrees of exposure to detergents.
   Eyes
Mild irritation.

First aid
 
   Ingestion
Immediately dilute with 4 to 8 ounces (120 to 240 ml) of milk or water (not to exceed 4 ounces/120 ml in a child). Spontaneous vomiting frequently occurs following ingestion. If spontaneous vomiting does not occur then significant ingestion is unlikely. Administration of activated charcoal is unnecessary. Observe patients with ingestion carefully for the possible development of esophageal or gastrointestinal tract irritation or burns. If signs or symptoms of esophageal irritation or burns are present, consider endoscopy to determine the extent of injury. Patient should be evaluated for burns to the mouth and esophagus following ingestion of low phosphate detergents which are generally more alkaline.
   Inhalation
Move patient to fresh air. Monitor for respiratory distress. If cough or difficulty breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer oxygen and assist ventilation as required. Treat bronchospasm with beta2 agonist and corticosteroid aerosols.
   Skin
Remove contaminated clothing, wash exposed area with copious amounts of water. A physician should examine the area if irritation or pain persists.
   Eyes
Irrigate exposed eyes with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility.

Transport.