Product Identification

Product Name

2-Chloroethylphosphonic acid

Synonyms

Chlorethephon
Ethephon
Flordimex
Kamposan
Tomathrel

CAS

16672-87-0

Formula

C2H6ClO3P

Molecular Weight

144.49

EINECS

240-718-3

RTECS

SZ7100000

RTECS Class

Agricultural Chemical and Pesticide

Merck

13,3767

Beilstein/Gmelin

1751208

Beilstein Reference

3-04-00-01780

EC Index Number

015-154-00-4

EC Class

Harmful; Corrosive; Dangerous for the Environment

Physical and Chemical Properties

Appearance

Needles from benzene.

Solubility in water

Very soluble

Melting Point

74 - 75

Density

1.58 g/cm3 (20 C)

pKa/pKb

1.99 (pKa)

Partition Coefficient

.62

Usage

Growth regulator.

Vapor Density

4.9

First Aid Measures

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.

Handling and Storage

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.

Hazards Identification

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.

Ingestion

Ingestion of acids may result in burns, gastrointestinal bleeding, gastritis, perforations, dilation, edema, necrosis, vomiting, stenosis, fistula, and duodenal/jejunal injury.

EC Risk Phrase

R 20/21 34 52/53

EC Safety Phrase

S 26 28 36/37/39 45 61

UN (DOT)

3261

Exposure Controls/Personal Protection

Personal 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.

Exposure Effects

Abnormal neuropsychologic function has been reported following hydrochloric acid exposure from a leaking tanker truck.

Poison Class

3

Fire Fighting Measures

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

Accidental Release Measures

Small spills/leaks

Clean up spills immediately. Avoid generating dusty conditions. Carefully scoop up and place into appropriate disposal container. Provide ventilation.

Stability and Reactivity

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.

Transport Information

UN Number

3261