Supplier Product Identification Physical and Chemical Properties First Aid Measures Handling and Storage Hazards Identification Exposure Controls/Personal Protection Fire Fighting Measures Accidental Release Measures Stability and Reactivity Transport Information
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2-Propynoic acid(471-25-0)

Supplier Product Identification Physical and Chemical Properties First Aid Measures Handling and Storage Hazards Identification Exposure Controls/Personal Protection Fire Fighting Measures Accidental Release Measures Stability and Reactivity Transport Information

Product Identification

Product Name
2-Propynoic acid
Synonyms
2-Propyne-1-carboxylic acid
2-Propynoic acid
Acetylenecarboxylic acid
Acetylenemonocarboxylic acid
Carboxyacetylene
Propiolic acid
CAS
471-25-0
Formula
C3H2O2
Molecular Weight
70.05
EINECS
207-437-8
RTECS
UD9300000
RTECS Class
Other
Merck
12,8006
Beilstein/Gmelin
878176
Beilstein Reference
4-02-00-01687
EC Class
toxic, corrosive

Physical and Chemical Properties

Appearance
Clear yellow to orange liquid. Acetic odor.
Solubility in water
Very soluble
Melting Point
18
Boiling Point
140
Vapor Pressure
3.7 (25 C0
Density
1.1499 g/cm3 (4 C)
pKa/pKb
1.99 (pKa)
Partition Coefficient
0.31 kJ/mol
Heat Of Vaporization
41.6 kJ/mol
Vapor Density
2.42
Refractive Index
1.4302 (20 C)

First Aid Measures

Ingestion
Never give anything by mouth to an unconscious person. Get medical aid immediately. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water.
Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. Do not use mouth-to-mouth respiration if victim ingested or inhaled the substance; induce artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device.
Skin
Get medical aid immediately. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately. Do NOT allow victim to rub or keep eyes closed.

Handling and Storage

Storage
Keep away from heat, sparks, and flame. Keep away from sources of ignition. Flammables-area. Refrigerator (approx 4 C). Keep containers tightly closed. Store protected from moisture.
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Ground and bond containers when transferring material. Use spark-proof tools and explosion proof equipment. Do not get in eyes, on skin, or on clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Keep container tightly closed. Avoid contact with heat, sparks and flame. Do not ingest or inhale. Use only in a chemical fume hood. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames.

Hazards Identification

Ingestion
Harmful if swallowed. May cause gastrointestinal irritation with nausea, vomiting and diarrhea. Ingestion of large amounts may cause CNS depression.
Inhalation
May cause severe irritation of the respiratory tract with sore throat, coughing, shortness of breath and delayed lung edema. Causes chemical burns to the respiratory tract. Inhalation may be fatal as a result of spasm, inflammation, edema of the larynx and bronchi, chemical pneumonitis and pulmonary edema. Vapors may cause dizziness or suffocation. May cause burning sensation, coughing, wheezing, laryngitis, shortness of breath, headache, nausea, and vomiting.
Skin
May cause severe irritation and possible burns. May cause dermatitis. Substance is readily absorbed through the slkin. May cause cyanosis of the extremities.
Eyes
Contact with eyes may cause severe irritation, and possible eye burns. Lachrymator. May cause chemical conjunctivitis and corneal damage.
Hazards
Contact with metals may evolve flammable hydrogen gas.
EC Risk Phrase
R 24/25 34 36/37
EC Safety Phrase
S 26 36/37/39 45
UN (DOT)
1760

Exposure Controls/Personal Protection

Personal Protection
Eyes: Wear safety glasses and chemical goggles if splashing is possible. Skin: Wear appropriate protective gloves and clothing to prevent skin exposure. Clothing: Wear appropriate protective clothing to minimize contact with skin.
Respirators
A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use.

Fire Fighting Measures

Flash Point
58
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. Will burn if involved in a fire. Use water spray to keep fire-exposed containers cool. Containers may explode in the heat of a fire. Extinguishing media: For small fires, use dry chemical, carbon dioxide, water spray or alcohol-resistant foam. For large fires, use water spray, fog, or alcohol-resistant foam. Use water spray to cool fire-exposed containers. Water may be ineffective. Do NOT use straight streams of water.
Fire Potential
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.

Accidental Release Measures

Small spills/leaks
Remove all sources of ignition. Absorb spill using an absorbent, non-combustible material such as earth, sand, or vermiculite. Use a spark-proof tool. Provide ventilation. A vapor suppressing foam may be used to reduce vapors.

Stability and Reactivity

Incompatibilities
Moisture, bases, oxidizing agents, reducing agents, copper (I) + ammonia, silver salts + ammonia.
Stability
Stable under normal temperatures and pressures.
Decomposition
Carbon monoxide, carbon dioxide, acrid smoke and fumes.
Combustion Products
Fire may produce irritating, corrosive and/or toxic gases.

Transport Information

UN Number
1760
Hazard Class
8
Packing Group
I; II; III
HS Code
2916 19 80
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