2-Chloroethylphosphonic acid

  • Ethephon
  • Chlorethephon
  • Tomathrel
  • Flordimex
  • Ethephon
  • Kamposan
Formula
ClCH2CH2PO(OH)2
Structure
Description
Needles from benzene.
Uses
Growth regulator.

Registry Numbers and Inventories.
CAS
16672-87-0
EC (EINECS/ELINCS)
240-718-3
EC Index Number
015-154-00-4
EC Class
Harmful; Corrosive; Dangerous for the Environment
R 20/21 34 52/53
S 26 28 36/37/39 45 61
RTECS
SZ7100000
RTECS class
Agricultural Chemical and Pesticide
UN (DOT)
3261
Merck
13,3767
Beilstein/Gmelin
1751208
Beilstein Reference
3-04-00-01780
EPA OPP
99801
Swiss Giftliste 1
G-8146
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C2H6ClO3P
Formula mass
144.49
Melting point, °C
74 - 75
Vapor density (air=1)
4.9
Density
1.58 g/cm3 (20 C)
Solubility in water
Very soluble
pKa/pKb
1.99 (pKa)
Partition coefficient, pKow
0.62

Hazards and Protection.
Storage
Keep container closed when not in use. Store in a cool, dry, well-ventilated area away from incompatible substances. Store protected from moisture.
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use only in a well ventilated area. Do not get in eyes, on skin, or on clothing. Keep container tightly closed. Do not ingest or inhale. Discard contaminated shoes.
Protection
Gloves and eye shields are advised.
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
Clean up spills immediately. Avoid generating dusty conditions. Carefully scoop up and place into appropriate disposal container. Provide ventilation.
Stability
Stable at room temperature in closed containers under normal storage and handling conditions.
Incompatibilities
Strong oxidizing agents.
Decomposition
Carbon monoxide, oxides of phosphorus, carbon dioxide, chloride fumes, phosphorous fumes.

Fire.
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.
Fire potential
Nonflammable

Health.
Poison_Class
3
Exposure effects
Abnormal neuropsychologic function has been reported following hydrochloric acid exposure from a leaking tanker truck.
   Ingestion
Ingestion of acids may result in burns, gastrointestinal bleeding, gastritis, perforations, dilation, edema, necrosis, vomiting, stenosis, fistula, and duodenal/jejunal injury.
   Inhalation
Inhalation may produce dyspnea, pleuritic chest pain, upper airway edema, pulmonary edema, hypoxemia, bronchospasm, pneumonitis, and persistent pulmonary function abnormalities. Airway hyperreactivity has also been reported.
   Skin
Causes irritation.
   Eyes
Causes irritation.

First aid
 
   Ingestion
Seek medical attention. If individual is drowsy or unconscious, do not give anything by mouth; place individual on the left side with the head down. Contact a physician, medical facility, or poison control center for advice about whether to induce vomiting. If possible, do not leave individual unattended.
   Inhalation
If symptoms develop, move individual away from exposure and into fresh air. If symptoms persist, seek medical attention. If breathing is difficult, administer oxygen. Keep person warm and quiet; seek immediate medical attention.
   Skin
Remove contaminated clothing, wash exposed area with copious amounts of water. A physician should examine the area if irritation or pain persists.
   Eyes
If symptoms develop, immediately move individual away from exposure and into fresh air. Flush eyes gently with water for at least 15 minutes while holding eyelids apart; seek immediate medical attention.

Transport.
UN number
3261
Response guide