Propargyl alcohol

  • 2-Propyn-1-ol
  • 2-Propynyl alcohol
  • 1-Propyn-3-ol
  • Prop-2-yn-1-ol
Formula
HC CCH2OH
Structure
Description
Clear, colorless to straw-colored, moderately volatile liquid, mild geranium-like odor, lachrymator.
Uses
Has been used to prevent hydrogen embrittlement of steel, as corrosion inhibitor, solvent stabilizer, soil fumigant, chemical intermediate.

Registry Numbers and Inventories.
CAS
107-19-7
EC (EINECS/ELINCS)
203-471-2
EC Index Number
603-078-00-X
EC Class
Flammable; Toxic; Corrosive; Dangerous for the Environment
R 10 23/24/25 34 51/53
S 26 28 36 45 61
RTECS
UK5075000
RTECS class
Agricultural Chemical and Pesticide; Tumorigen; Mutagen
UN (DOT)
1986
Merck
12,7993
Beilstein/Gmelin
506003
Beilstein Reference
4-01-00-02214
RCRA
P102
EPA OPP
68702
Swiss Giftliste 1
G-2815
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C3H4O
Formula mass
56.06
Melting point, °C
-53
Boiling point, °C
114
Vapor pressure, mmHg
11 (25 C)
Vapor density (air=1)
1.93
Saturation Concentration
Approximately 15300 ppm (1.53%) at 20 C (calculated)
Density
0.9485 g/cm3 (20 C)
Solubility in water
Soluble
Viscosity
1.65 cp (20 C)
Surface tension
36 g/s2
Refractive index
1.4295 (20 C)
pKa/pKb
13.21 (pKa)
Partition coefficient, pKow
-0.38
Heat of vaporization
41.0 kJ/mol
Heat of combustion
-1805 kJ/mol

Hazards and Protection.
Storage
Keep away from sources of ignition. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Flammables-area. Refrigerator/flammables.
B2 D1A D2B E
Handling
Wash thoroughly after handling. Ground and bond containers when transferring material. Use spark-proof tools and explosion proof equipment. Avoid contact with eyes, skin, and 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 with adequate ventilation. Discard contaminated shoes. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear a chemical apron. Wear appropriate protective clothing to prevent skin exposure.
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. 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
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Clean up spills immediately, using the appropriate protective equipment. Remove all sources of ignition. Use a spark-proof tool. Provide ventilation. A vapor suppressing foam may be used to reduce vapors.
Disposal code
9
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Incompatible with isocyanates, halogenated organics, peroxides, phenols (acidic), epoxides, anhydrides, and acid halides Flammable gaseous hydrogen is generated in combination with strong reducing agents, such as hydrides Reacts violently with alcohols or water.
Decomposition
Carbon monoxide, carbon dioxide.

Fire.
Flash Point,°C
33
Autoignition, °C
365
Upper exp. limit, %
86.2
Lower exp. limit, %
1.9
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
Quite flammable.
Hazards
Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion and poison hazard indoors, outdoors or in sewers.
Combustion products
Acrid smoke, fumes
Health
4
 
Flammability
3
 
 
Reactivity
3
 

Health.
Exposure limit(s)
TLV: 1 ppm; 2.3 mg/m3 (skin) (ACGIH 1996). MAK: 2 ppm; 5 mg/m3; H (1995). NIOSH REL: TWA 1 ppm (2 mg/m3) skin
Poison_Class
3
Exposure effects
Headache, dizziness, giddiness, ataxia, sedation and coma may occur.
   Ingestion
May be fatal if swallowed. May cause severe and permanent damage to the digestive tract. Causes gastrointestinal tract burns.
   Inhalation
Harmful if inhaled. Causes chemical burns to the respiratory tract. Vapors may cause dizziness or suffocation.
   Skin
May be fatal if absorbed through the skin. Causes skin burns.
   Eyes
Causes eye burns. Lachrymator.

First aid
 
   Ingestion
Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. DO NOT use mouth-to-mouth respiration.
   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. Wash clothing before reuse. Destroy contaminated shoes.
   Eyes
Get medical aid immediately. Do NOT allow victim to rub or keep eyes closed. Extensive irrigation is required (at least 30 minutes).

Transport.
UN number
1986
Response guide
Hazard class
3
Packing Group
I; II; III
 
USCG CHRIS Code
PRO
 
HS Code
2905 29 90
 
Std. Transport #
4907830